CN108614913B - Calculation method and device for reinforcement ratio of concrete unit - Google Patents

Abstract

The invention provides a method and a device for calculating the reinforcement ratio of a concrete unit, wherein the method comprises the following steps: the method comprises the steps of obtaining a concrete model and a steel bar model of a target building, adopting a preset geometric unit to divide the concrete model, obtaining a concrete finite element model, wherein the concrete finite element model comprises M concrete units, M is an integer larger than 0, adopting a preset linear unit to divide the steel bar model, obtaining the steel bar finite element model, the steel bar finite element model comprises N steel bar units, N is an integer larger than 0, and obtaining the reinforcement ratio of each concrete unit according to the position information of the steel bar units and the position information of the concrete units. The method is suitable for calculating the reinforcement ratio of the concrete units in more complex projects, and can provide data support for subsequent finite element calculation and analysis of the combined action of the reinforced concrete.

Description

Calculation method and device for reinforcement ratio of concrete elements

technical field

The invention relates to the field of engineering numerical simulation, in particular to a method and a device for calculating the reinforcement ratio of a concrete unit.

Background technique

Dam bodies such as gravity dams and arch dams are common large-scale hydraulic structures, some of which are distributed in the strong earthquake area in the west of my country. When an earthquake occurs, the dam body is at risk of cracking. Therefore, it is necessary to increase the dam surface reinforcement. Seismic resistance of the dam body. Generally, it is necessary to calculate the reinforcement ratio of the concrete of the building in the project, and the reinforcement ratio of the concrete can be used to reflect the reinforcement conditions of the project. , to avoid the occurrence of super-strand damage and less-strength damage.

The method of calculating the reinforcement ratio of building concrete in the prior art is to obtain the reinforcement ratio of concrete by dividing the volume of reinforcement by the volume of concrete. The method in the prior art is only applicable to the calculation of the reinforcement ratio of such simple buildings as beams, columns, slabs, etc., and is not applicable to the complex building models and complex reinforcement conditions in the engineering, and through the existing technology The obtained reinforcement ratio of concrete cannot provide data support for the subsequent finite element analysis of reinforced concrete combined action.

SUMMARY OF THE INVENTION

Aiming at the defects in the prior art, the present invention provides a method and device for calculating the reinforcement ratio of a concrete unit.

In one aspect, the present invention provides a method for calculating the reinforcement ratio of a concrete unit, the method comprising:

Obtain the concrete model and reinforcement model of the target building;

Divide the concrete model by using a preset three-dimensional geometric unit to obtain a concrete finite element model, where the concrete finite element model includes M concrete units, where M is an integer greater than 0;

Use preset linear elements to divide the steel bar model, and obtain a steel bar finite element model, where the steel bar finite element model includes N steel bar elements, and N is an integer greater than 0;

According to the position information of the reinforcing bar unit and the position information of the concrete unit, the reinforcement ratio of each concrete unit is acquired.

Further, before acquiring the reinforcement ratio of each concrete unit according to the location information of the reinforcing bar unit and the location information of the concrete unit, the method further includes:

According to the shape function of the concrete unit, the location information of the reinforcing bar unit, and the location information of the concrete unit, a mapping relationship between the reinforcing bar unit and the concrete unit is established.

Further, according to the shape function of the concrete unit, the location information of the reinforcing bar unit, and the location information of the concrete unit, establishing the mapping relationship between the reinforcing bar unit and the concrete unit includes:

According to the shape function of the concrete unit and the position information of the concrete unit, isoparametric transformation of the concrete unit is performed, and the Newton iteration method is used for calculation to calculate the local coordinates of the end points of each of the reinforcing bar units;

A mapping relationship is established between the concrete unit where the local coordinates of the end points of the reinforcing bar unit are located and the reinforcing bar unit.

Further, according to the position information of the reinforcement unit and the position information of the concrete unit, the reinforcement ratio of each concrete unit is obtained, including:

According to the mapping relationship between the reinforcing bar unit and the concrete unit, traverse the reinforcing bar units with the mapping relationship of each concrete unit;

The reinforcement ratio of each concrete element is obtained according to the number of end points of each reinforcement element located in the corresponding concrete element among the reinforcement elements in which each concrete element has a mapping relationship.

Further, obtain the reinforcement ratio of each concrete unit according to the number of end points of each reinforcement unit in the corresponding concrete unit in the reinforcement unit with the mapping relationship of each concrete unit, including:

Calculate the volume of the reinforcement unit with the mapping relationship of each concrete unit in the corresponding concrete unit, wherein, if the number of end points of the reinforcement unit in the corresponding concrete unit is 1, then the volume of the reinforcement unit in the corresponding concrete unit is the reinforcement 1/2 of the actual volume of the unit; if the number of end points of the reinforcement unit in the corresponding concrete unit is 2, the volume of the reinforcement unit in the corresponding concrete unit is the actual volume of the reinforcement unit;

The reinforcement ratio of each concrete unit is obtained according to the volume of the reinforcing bar unit with the mapping relationship of each concrete unit in the corresponding concrete unit.

In another aspect, the present invention also provides a device for calculating the reinforcement ratio of a concrete unit, the device comprising:

The acquisition module is used to acquire the concrete model and reinforcement model of the target building;

a first meshing module, configured to divide the concrete model by using preset three-dimensional geometric units to obtain a concrete finite element model, where the concrete finite element model includes M concrete units, where M is an integer greater than 0;

a second meshing module, configured to divide the reinforcing bar model by using preset line elements to obtain a reinforcing bar finite element model, where the reinforcing bar finite element model includes N reinforcing bar elements, and N is an integer greater than 0;

The calculation module is configured to obtain the reinforcement ratio of each concrete unit according to the position information of the reinforcement unit and the position information of the concrete unit.

Further, the calculation module is further configured to, before obtaining the reinforcement ratio of each concrete unit according to the position information of the reinforcement unit and the position information of the concrete unit, according to the shape function of the concrete unit, the The location information of the reinforcement unit and the location information of the concrete unit establish a mapping relationship between the reinforcement unit and the concrete unit.

Further, the calculation module is specifically used for isoparametric transformation of the concrete unit according to the shape function of the concrete unit and the position information of the concrete unit, and calculates by using the Newton iteration method to calculate each of the steel bar units. the local coordinates of the endpoint;

A mapping relationship is established between the concrete unit where the local coordinates of the end points of the reinforcing bar unit are located and the reinforcing bar unit.

Further, the calculation module is specifically configured to traverse the reinforcing bar units that have a mapping relationship in each concrete unit according to the mapping relationship between the reinforcing bar unit and the concrete unit;

The reinforcement ratio of each concrete element is obtained according to the number of end points of each reinforcement element located in the corresponding concrete element among the reinforcement elements in which each concrete element has a mapping relationship.

Further, the calculation module is specifically used to calculate the volume of the reinforcing bar unit with the mapping relationship of each concrete unit in the corresponding concrete unit, wherein, if the number of end points of the reinforcing bar unit in the corresponding concrete unit is 1, then The volume in the corresponding concrete unit is 1/2 of the actual volume of the reinforcement unit; if the number of end points of the reinforcement unit in the corresponding concrete unit is 2, the volume of the reinforcement unit in the corresponding concrete unit is the reinforcement unit actual volume;

The reinforcement ratio of each concrete unit is obtained according to the volume of the reinforcing bar unit with the mapping relationship of each concrete unit in the corresponding concrete unit.

In the method and device for calculating the reinforcement ratio of a concrete unit provided by the present invention, the concrete model and the reinforcement model of the target building are obtained, and the concrete model is divided by a preset three-dimensional geometric unit to obtain the concrete finite element model. The concrete finite element model includes M concrete units, where M is an integer greater than 0, and the steel bar model is divided by using preset line elements to obtain a steel bar finite element model, where the steel bar finite element model includes N steel bar units, N is an integer greater than 0, and the reinforcement ratio of each concrete unit is obtained according to the position information of the reinforcement unit and the position information of the concrete unit. That is, by obtaining the concrete finite element model and the steel finite element model of the target building respectively, and using the finite element isoparametric transformation function and the Newton iteration method for calculation, the reinforcement ratio of the concrete element is obtained, which can be applied to more It can calculate the reinforcement ratio of concrete elements in many complex projects, and the obtained reinforcement ratio of concrete elements of the target building can provide data support for the subsequent finite element calculation and analysis of reinforced concrete combined action.

Description of drawings

In order to explain the various embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of each embodiment. Obviously, the accompanying drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic flow chart of Embodiment 1 of a method for calculating the reinforcement ratio of a concrete unit provided by the present invention;

Figure 2 is a schematic diagram of the local coordinate system in the concrete finite element model;

3 is a schematic structural diagram of Embodiment 1 of the computing device for the reinforcement ratio of concrete units provided by the present invention;

4 is a schematic structural diagram of Embodiment 2 of the device for calculating the reinforcement ratio of concrete units provided by the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a schematic flowchart of Embodiment 1 of the method for calculating the reinforcement ratio of concrete units provided by the present invention. As shown in FIG. 1 , the method includes:

S101. Acquire a concrete model and a steel bar model of the target building.

The separate reinforced concrete model is established under the overall coordinate system according to the entity target building, that is, the concrete model and the steel bar model are respectively established under the overall coordinate system according to the entity target building. Also, in this model, it is assumed that the bond between the concrete and the rebar is good and there will be no relative slippage.

S102. Use a preset three-dimensional geometric unit to divide the concrete model to obtain a concrete finite element model, where the concrete finite element model includes M concrete units, where M is an integer greater than 0.

Optionally, the preset three-dimensional geometric unit may be a three-dimensional 8-node hexahedron unit, a three-dimensional 6-node triangular prism unit, and a three-dimensional 4-node tetrahedron unit. It should be noted that the above-mentioned preset three-dimensional geometric unit may also be other three-dimensional geometric units. , is not limited to the above three three-dimensional geometric units, which is not limited in the present invention.

When dividing the above concrete model and obtaining the concrete finite element model, the size of the preset three-dimensional geometric element should not be too large. The smaller the size of the preset three-dimensional geometric unit, the higher the accuracy of the calculation result, but the larger the amount of calculation. Therefore, the concrete model for different target buildings can be divided into three-dimensional geometric units of suitable size according to the actual situation. Obtain a finite element model. Optionally, in an implementation manner, the length of each side of the preset three-dimensional geometric unit may be 1-2 meters.

Further, the above-mentioned concrete finite element model includes M concrete elements, and each concrete element has a plurality of nodes. For example, if the concrete model is divided by a cube with a side length of 1 meter, then each concrete element has 8 nodes.

It should be noted that, in practical applications, one or more solid geometric units can be selected to divide the concrete model of the target building according to the actual situation, that is to say, different areas of the concrete model of the target building can be selected. The three-dimensional geometric unit is divided to make the obtained concrete finite element model more accurate, which is not limited in the present invention.

S103. Use preset line elements to divide the steel bar model to obtain a steel bar finite element model, where the steel bar finite element model includes N steel bar units, and N is an integer greater than 0.

Since the steel bar is a slender material, its transverse shear strength can usually be ignored, and it is considered that it only bears the axial force in the longitudinal direction. Therefore, the steel bar model is divided by linear elements to obtain the steel bar finite element model. For example: use three-dimensional 2-node line elements to divide the reinforcement model.

Among them, the smaller the size of the linear element, the higher the accuracy of the obtained calculation result, and the larger the size of the linear element, the lower the accuracy of the obtained result. In order to accurately simulate the combined effect of reinforced concrete and reduce the calculation error, optionally in an implementation manner, the size of the linear unit may be 5% of the size of the concrete solid geometric unit. For example, when a concrete model is partitioned with a 1-meter cube, the linear element size is 0.05 meters.

Further, the above-mentioned finite element model of reinforcing bars includes N reinforcing bar units, and each reinforcing bar unit includes two end points. And number all the endpoints of the above N reinforcement elements.

S104. Acquire the reinforcement ratio of each concrete unit according to the location information of the reinforcing bar unit and the location information of the concrete unit.

In this embodiment, by obtaining the concrete model and the steel bar model of the target building, the concrete model is divided by using preset three-dimensional geometric units, and the concrete finite element model is obtained. The concrete finite element model includes M concrete units, where M is If the integer is greater than 0, the steel bar model is divided by the preset line element, and the steel bar finite element model is obtained. The steel bar finite element model includes N steel bar units, and N is an integer greater than 0. The location information and the location information of the concrete unit are used to obtain the reinforcement ratio of each concrete unit. That is, by obtaining the concrete finite element model and the steel finite element model of the target building respectively, and using the finite element isoparametric transformation function and the Newton iteration method for calculation, the reinforcement ratio of the concrete element is obtained, which can be applied to more It can calculate the reinforcement ratio of concrete elements in many complex projects, and the obtained reinforcement ratio of concrete elements of the target building can provide data support for the subsequent finite element calculation and analysis of reinforced concrete combined action.

Optionally, in an implementation manner, in the above embodiment, the reinforcement ratio of each concrete unit is obtained according to the position information of the reinforcement unit and the position information of the concrete unit, and the following process may be performed:

First, according to the shape function of the concrete unit, the location information of the reinforcing bar unit, and the location information of the concrete unit, a mapping relationship between the reinforcing bar unit and the concrete unit is established.

Specifically, according to the shape function of the concrete unit and the position information of the concrete unit, isoparametric transformation of the concrete unit is performed, and the Newton iteration method is used for calculation to calculate the local coordinates of each end point of the steel bar unit.

A mapping relationship is established between the concrete unit where the local coordinates of the end points of the reinforcing bar unit are located and the reinforcing bar unit.

It should be noted here that, when obtaining the local coordinates of the end points of the reinforcing bar unit in a certain concrete unit, a local coordinate system is first established according to the concrete unit. For example, after the concrete model is divided by a three-dimensional eight-node hexahedron element, the schematic diagram of the corresponding concrete element and the schematic diagram of the local coordinate system established according to the concrete element are shown in Figure 2. Of course, other nodes in the concrete element can also be used as the origin. Establishing a local coordinate system and establishing different local coordinate systems for the same concrete unit does not affect the calculation results. When other types of solid geometric elements are used to divide the concrete model, the corresponding concrete elements and the method for establishing the local coordinate system based on the concrete elements are similar to the existing methods, and the present invention will not describe them in detail here.

In practical applications, based on the finite element isoparametric transformation of the concrete element, the corresponding local coordinates are calculated according to the coordinates of the end points of the reinforcement element in the global coordinate system, and then it is judged whether the local coordinates of the end points of the reinforcement element are in the concrete within the unit.

From a geometrically regular cell in local coordinates to a geometrically distorted cell in global coordinates, the coordinate transformation is as follows:

Among them, m is the number of nodes of the concrete element, _xi , y _i , _zi are the coordinate values of a concrete element node in the global coordinate, ξ, η, ζ are the local coordinate system, N _i (ξ,η,ζ ) is the shape function expressed in local coordinates, and Ni (ξ,η, _ζ ) can be obtained from books on finite element methods according to the preset solid geometry element type.

According to formula (1), let:

利用方程

求所述钢筋单元端点在该混凝土单元中的局部坐标

The global coordinates of one of the end points of the reinforcement element are known as

Use equations

Find the local coordinates of the end points of the reinforcement element in the concrete element

make:

Solve:

According to Newton's iteration method, we can get:

为第n+1步的迭代结果，

为第n步的迭代结果。Among them, in formula (5)

is the iterative result of the n+1th step,

is the iterative result of the nth step.

make:

称为雅克比Jacobi矩阵，

为

的逆矩阵。Among them, in formula (8)

is called the Jacobi matrix,

for

The inverse matrix of .

代入(5)、(6)、(8)中可得：Will

Substitute into (5), (6), (8) to get:

的所述钢筋单元端点在所述混凝土单元中的局部坐标为：If |ξ _n+1 -ξ _n |≤ε, |η _n+ 1 -η _n |≤ε, |ζ _n+1 -ζ _n |≤ε, the iteration ends, and ε is the set convergence tolerance, then The overall coordinates are

The local coordinates of the end points of the reinforcement element in the concrete element are:

Further, the determination is made according to the local coordinates of the end points of the reinforcing bar unit in the concrete unit and the position information of the concrete unit.

If the local coordinates of the end points of the reinforcing bar units are in the concrete unit, a mapping relationship between the end numbers of the reinforcing bar units and the concrete unit numbers is established.

If the local coordinates of the end point of the reinforcing bar unit are not in the concrete unit, traverse the next concrete unit until a concrete unit corresponding to the end point of the reinforcing bar unit is found, and a corresponding mapping relationship is established.

It should be noted that the method of judging whether the local coordinates of the end points of the reinforcing bar unit are in the concrete unit by the coordinate position is similar to the prior art, and the present invention will not describe it in detail here.

Optionally, in an implementation manner, if the local coordinates of the end points of the reinforcing bar units are not in the concrete unit, the traversal is performed according to the order of the concrete unit numbers from small to large.

Further, according to the mapping relationship between the reinforcing bar unit and the concrete unit, traverse the reinforcing bar units with the mapping relationship of each concrete unit.

The reinforcement ratio of each concrete element is obtained according to the number of end points of each reinforcement element located in the corresponding concrete element among the reinforcement elements in which each concrete element has a mapping relationship.

Specifically, for a certain concrete unit, the reinforcement unit is traversed, and the number of end points of the reinforcement unit in the concrete unit is determined according to the mapping relationship established above. If the reinforcement unit is located in the corresponding concrete The number of endpoints in a unit is 1, then the volume of the reinforcing bar unit in the x, y, and z directions of the corresponding concrete unit is 1/2 of the actual volume of the reinforcing bar unit and the direction vector of the reinforcing bar unit is in the x, y, and z directions. If the number of end points of the reinforcement element in the corresponding concrete element is 2, the volume of the reinforcement element in the x, y, and z directions in the corresponding concrete element is the actual volume of the reinforcement element and the direction vector of the reinforcement element in x The product of the , y, and z direction components. When the traversal of the reinforcement element is completed, the volumes of all reinforcement elements in the concrete element in the x, y, and z directions are accumulated and divided by the volume of the concrete element. Reinforcement ratios ρ _x , ρ _y , ρ _z in the z direction.

It should be noted that, when the traversal is performed, if there is no mapping relationship between the reinforcement element and the concrete element, the volume of the reinforcement element in the concrete element is 0.

It should be noted that the actual volume of the reinforcing bar unit is the product of the cross-sectional area of the reinforcing bar unit and the length of the linear unit.

Further, start to traverse each of the concrete units in the concrete finite element model until the reinforcement ratios of all the concrete units are obtained, and end the traversal of the concrete units.

Optionally, a traversal method is to traverse according to the order of the reinforcement unit numbers and the concrete unit numbers from small to large.

For example, the concrete finite element model has M concrete elements, and the reinforcement finite element model has N reinforcement elements, then for the first concrete element, start to traverse the N reinforcement elements in the reinforcement finite element model. First, according to the mapping relationship, determine the number of end points of the first reinforcing bar element in the first concrete unit, and obtain the corresponding reinforcing bars of the first reinforcing bar unit in the x, y, and z directions of the first concrete unit. The unit volume, and then according to the mapping relationship, determine the number of end points of the second reinforcing bar unit in the first concrete unit, and obtain the corresponding x, y, and z directions of the second reinforcing bar unit in the first concrete unit. , and so on, to obtain the corresponding reinforcement unit volumes of N reinforcement elements in the x, y, and z directions of the first concrete element. Then, the corresponding reinforcement volumes of the N reinforcement elements in the reinforcement finite element model in the x, y, and z directions of the first concrete element are summed, and then divided by the volume of the first concrete element to obtain the first concrete element. The reinforcement ratio of the element in the x, y, and z directions.

Further, for the second concrete element, start to traverse all N reinforcement elements in the finite element model of reinforcement, and obtain the reinforcement ratio of the second concrete element in the x, y, and z directions by the same method as above. By analogy, the M concrete elements in the concrete finite element model are traversed, and the reinforcement ratios of the M concrete elements in the x, y, and z directions are obtained.

It should be noted that, in the present invention, the reinforcement unit and the concrete unit can also be traversed in other order. For example, the reinforcement unit number and the concrete unit number can be traversed in descending order, which is not limited in the present invention. .

According to the position information of the reinforcing bar unit and the position information of the concrete unit, the reinforcement ratio of each concrete unit is obtained. Another implementation manner may be:

First, according to the shape function of the concrete element and the position information of the concrete element, the isoparametric transformation of the concrete element is carried out, and the Newton iteration method is used for calculation to calculate the local coordinates of the end points of each of the steel reinforcement elements;

According to the local coordinates of the end points of each reinforcing bar unit, it is directly judged whether it is in the concrete unit. If the number of end points of the reinforcing bar unit in the corresponding concrete unit is 1, the reinforcing bar unit is in the x, y, and z directions of the corresponding concrete unit. The volume above is the product of 1/2 of the actual volume of the reinforcement element and the components of the direction vector of the reinforcement element in the x, y, and z directions; if the number of endpoints of the reinforcement element in the corresponding concrete element is 2, the reinforcement element is in the The volume corresponding to the x, y, and z directions in the concrete unit is the product of the actual volume of the reinforcing bar unit and the components of the direction vector of the reinforcing bar unit in the x, y, and z directions.

It should be noted that the method for calculating the local coordinates of the end points of each of the reinforcing bar elements is the same as the aforementioned method.

In this embodiment, the concrete model and the steel bar model of the target building are obtained, and the concrete model is divided by the preset three-dimensional geometric elements, and the concrete finite element model is obtained. The concrete finite element model includes M concrete elements, and M is greater than or equal to an integer of 0, the steel bar model is divided by a preset line type element, and a steel bar finite element model is obtained. The steel bar finite element model includes N steel bar elements, and N is an integer greater than 0. According to the position of the steel bar element information, the location information of the concrete unit, and obtain the reinforcement ratio of each concrete unit. That is, by obtaining the concrete finite element model and the steel finite element model of the target building respectively, and using the finite element isoparametric transformation function and the Newton iteration method for calculation, the reinforcement ratio of the concrete element is obtained, which can be applied to more It can calculate the reinforcement ratio of concrete elements in many complex projects, and the obtained reinforcement ratio of concrete elements of the target building can provide data support for the subsequent finite element calculation and analysis of reinforced concrete combined action.

FIG. 3 is a schematic structural diagram of Embodiment 1 of the apparatus for calculating the reinforcement ratio of concrete units provided by the present invention. The device for calculating the reinforcement ratio of a concrete unit provided by the present invention can be used to implement the technical solution of the method embodiment shown in FIG. 1 . As shown in FIG. 3 , the calculation device for the reinforcement ratio of concrete units provided in this embodiment includes:

The acquiring module 31 is used to acquire the concrete model and the steel reinforcement model of the target building.

The first mesh dividing module 32 is configured to divide the concrete model by using preset three-dimensional geometric units to obtain a concrete finite element model, where the concrete finite element model includes M concrete units, where M is an integer greater than 0.

The second meshing module 33 is configured to divide the reinforcing bar model by using preset line elements to obtain a reinforcing bar finite element model, where the reinforcing bar finite element model includes N reinforcing bar elements, and N is an integer greater than 0.

The calculation module 34 is configured to obtain the reinforcement ratio of each concrete unit according to the position information of the reinforcement unit and the position information of the concrete unit.

The device provided in this embodiment specifically obtains the concrete finite element model and the reinforcement finite element model of the target building, and uses the finite element isoparametric transformation function and the Newton iteration method to calculate, so as to obtain the reinforcement ratio of the concrete element. , which can be applied to the calculation of the reinforcement ratio of concrete elements in more complex projects, and the obtained reinforcement ratio of concrete elements of the target building can provide data support for the subsequent finite element calculation and analysis of reinforced concrete combined action.

In an embodiment of the present invention, the calculation module 34 is further configured to, before acquiring the reinforcement ratio of each concrete unit according to the position information of the reinforcement unit and the position information of the concrete unit, calculate the reinforcement ratio according to the concrete unit. The shape function of the unit, the location information of the reinforcing bar unit, and the location information of the concrete unit are used to establish the mapping relationship between the reinforcing bar unit and the concrete unit.

Specifically, the calculation module 34 is specifically configured to perform isoparametric transformation of the concrete unit according to the shape function of the concrete unit and the position information of the concrete unit, and use the Newton iteration method for calculation to calculate the end points of each of the steel bar units. the local coordinates of ;

A mapping relationship is established between the concrete unit where the local coordinates of the end points of the reinforcing bar unit are located and the reinforcing bar unit.

Further, the calculation module 34 is specifically configured to traverse the reinforcing bar units in which the mapping relationship exists in each concrete unit according to the mapping relationship between the reinforcing bar unit and the concrete unit;

The reinforcement ratio of each concrete element is obtained according to the number of end points of each reinforcement element located in the corresponding concrete element among the reinforcement elements in which each concrete element has a mapping relationship.

Further, the calculation module 34 is specifically used to calculate the volume of the reinforcing bar unit in the corresponding concrete unit that each concrete unit has a mapping relationship, wherein, if the number of endpoints of the reinforcing bar unit in the corresponding concrete unit is 1, then the reinforcing bar unit is in the corresponding concrete unit. The volume in the corresponding concrete unit is 1/2 of the actual volume of the reinforcement unit; if the number of endpoints of the reinforcement unit in the corresponding concrete unit is 2, the volume of the reinforcement unit in the corresponding concrete unit is the actual volume of the reinforcement unit. volume;

The reinforcement ratio of each concrete unit is obtained according to the volume of the reinforcing bar unit with the mapping relationship of each concrete unit in the corresponding concrete unit.

FIG. 4 is a schematic structural diagram of Embodiment 2 of the device for calculating the reinforcement ratio of a concrete unit provided by the present invention. The apparatus may include: a memory 401 and a processor 402 .

The memory 401 may be an independent physical unit, and may be connected to the processor 402 through a bus. The memory 401 and the processor 402 may also be integrated together, implemented by hardware, or the like.

The memory 401 is used to store and implement the above method embodiments, and the processor 402 invokes the program to execute the operations of the method embodiments performed by the above devices.

Optionally, when part or all of the methods in the foregoing embodiments are implemented by software, the foregoing apparatus may also only include a processor. The memory for storing the program is located outside the above-mentioned device, and the processor is connected to the memory through a circuit/wire for reading and executing the program stored in the memory.

The processor may be a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), or a combination of CPU and NP.

The processor may further include a hardware chip. The above hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The above-mentioned PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

The memory may include volatile memory (volatile memory), such as random-access memory (random-access memory, RAM); the memory may also include non-volatile memory (non-volatile memory), such as flash memory (flash memory), A hard disk drive (HDD) or a solid-state drive (SSD); the memory may also include a combination of the above types of memory.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps including the above method embodiments are executed; and the foregoing storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention. scope.

Claims (4)

1. A method for calculating the reinforcement ratio of a concrete unit is characterized by comprising the following steps:

acquiring a concrete model and a steel bar model of a target building;

dividing the concrete model by adopting a preset solid geometry unit to obtain a concrete finite element model, wherein the concrete finite element model comprises M concrete units, and M is an integer greater than 0;

dividing the reinforcing steel bar model by adopting a preset linear unit to obtain a reinforcing steel bar finite element model, wherein the reinforcing steel bar finite element model comprises N reinforcing steel bar units, and N is an integer greater than 0;

acquiring the reinforcement ratio of each concrete unit according to the position information of the steel bar unit and the position information of the concrete unit;

the method for acquiring the reinforcement ratio of each concrete unit according to the position information of the steel bar unit and the position information of the concrete unit comprises the following steps:

according to the shape function of the concrete unit and the position information of the concrete unit, performing equal parameter transformation on the concrete unit, calculating by adopting a Newton iteration method, and calculating the local coordinate of each reinforcing steel bar unit end point;

establishing a mapping relation between the concrete unit where the local coordinates of the end points of the steel bar units are located and the steel bar units;

traversing the steel bar units with the mapping relation of the concrete units according to the mapping relation of the steel bar units and the concrete units;

acquiring the volume of the reinforcement unit with the mapping relation in the corresponding concrete unit according to the number of the end points of each reinforcement unit in the reinforcement unit with the mapping relation in the corresponding concrete unit;

and acquiring the reinforcement ratio of each concrete unit according to the volume of the reinforcement unit with the mapping relation in each concrete unit in the corresponding concrete unit.

2. The method of claim 1, wherein if the number of the end points of the reinforcement unit located in the corresponding concrete unit is 1, the volume of the reinforcement unit in the corresponding concrete unit is 1/2 of the actual volume of the reinforcement unit; and if the number of the end points of the steel bar unit in the corresponding concrete unit is 2, the volume of the steel bar unit in the corresponding concrete unit is the actual volume of the steel bar unit.

3. A device for calculating reinforcement ratio of a concrete unit, comprising:

the acquisition module is used for acquiring a concrete model and a steel bar model of a target building;

the first grid division module is used for dividing the concrete model by adopting a preset solid geometric unit to obtain a concrete finite element model, wherein the concrete finite element model comprises M concrete units, and M is an integer greater than 0;

the second mesh division module is used for dividing the steel bar model by adopting preset linear units to obtain a steel bar finite element model, wherein the steel bar finite element model comprises N steel bar units, and N is an integer greater than 0;

the calculation module is used for acquiring the reinforcement ratio of each concrete unit according to the position information of the steel bar unit and the position information of the concrete unit;

the calculation module is specifically configured to perform isoparametric transformation on the concrete unit according to a shape function of the concrete unit and position information of the concrete unit, calculate by using a newton iteration method, and calculate local coordinates of end points of each reinforcement unit;

establishing a mapping relation between the concrete unit where the local coordinates of the end points of the steel bar units are located and the steel bar units;

traversing the steel bar units with the mapping relation of the concrete units according to the mapping relation of the steel bar units and the concrete units;

acquiring the volume of the reinforcement unit with the mapping relation in the corresponding concrete unit according to the number of the end points of each reinforcement unit in the reinforcement unit with the mapping relation in the corresponding concrete unit;

and acquiring the reinforcement ratio of each concrete unit according to the volume of the reinforcement unit with the mapping relation in each concrete unit in the corresponding concrete unit.

4. The apparatus of claim 3, wherein if the number of the end points of the reinforcement unit located in the corresponding concrete unit is 1, the volume of the reinforcement unit in the corresponding concrete unit is 1/2 of the actual volume of the reinforcement unit; and if the number of the end points of the steel bar unit in the corresponding concrete unit is 2, the volume of the steel bar unit in the corresponding concrete unit is the actual volume of the steel bar unit.

Images