CN113373791A - Anti-pulling and non-shearing connecting piece and construction method - Google Patents
Anti-pulling and non-shearing connecting piece and construction method Download PDFInfo
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- CN113373791A CN113373791A CN202110624517.8A CN202110624517A CN113373791A CN 113373791 A CN113373791 A CN 113373791A CN 202110624517 A CN202110624517 A CN 202110624517A CN 113373791 A CN113373791 A CN 113373791A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
本发明公开了一种抗拔不抗剪的连接件及施工方法，包括栓钉、套管、上垫片和下垫片，所述栓钉套接于套管，所述上垫片和下垫片分别套接于套管的两端，所述栓钉的中部的外径小于套管的内径，所述套管包括第一半圆管和第二半圆管，所述第一半圆管和第二半圆管相对设置，且所述第一半圆管和第二半圆管拼接成型，所述第一半圆管和第二半圆管的两端均设有法兰边，所述上垫片和下垫片均位于法兰边的内端。此连接件的栓钉的中部的外径小于套管的内径，将栓钉改为中部预留空间与套管结合，使混凝土与连接件之间相互作用，导致套管变形，让混凝土挤压至预留空间内，从而增强了桥面板与钢梁的抗拔强度。
The invention discloses a pull-resistant but shear-resistant connector and a construction method, comprising a stud, a sleeve, an upper gasket and a lower gasket, the stud is sleeved on the sleeve, and the upper gasket and the lower gasket are sleeved. The gaskets are respectively sleeved on both ends of the sleeve, the outer diameter of the middle part of the peg is smaller than the inner diameter of the sleeve, the sleeve includes a first semicircular tube and a second semicircular tube, the first semicircular tube and the third semicircular tube. The two semi-circular tubes are arranged opposite to each other, and the first semi-circular tube and the second semi-circular tube are formed by splicing together. Both ends of the first semi-circular tube and the second semi-circular tube are provided with flanges. The upper gasket and the lower gasket The sheets are located on the inner end of the flange edge. The outer diameter of the middle of the stud of this connector is smaller than the inner diameter of the casing. Change the stud to the reserved space in the middle to combine with the casing, so that the concrete and the connector interact, causing the casing to deform and squeeze the concrete. into the reserved space, thereby enhancing the pull-out strength of the bridge deck and the steel beam.
Description
Technical Field
The invention relates to the technical field of combined connection among members in buildings, in particular to a connecting piece resisting pulling and shearing and a construction method.
Background
The traditional steel-concrete composite structure generally adopts a shear connecting piece, and the shear connecting piece enables the deformation of a concrete slab and a steel beam to be consistent, so that the purpose of the composite structure is achieved. Conventional steel-concrete slab shear connectors serve primarily as: 1. the shear connector can resist the separation or lifting tendency of the concrete slab and the steel beam in the vertical direction caused by the integral longitudinal bending, local transverse bending and the like of the concrete slab; 2. the longitudinal shear resisting effect is realized, the longitudinal shear force between the steel beam and the concrete slab interface is borne through the shear rigidity of the shear connecting piece, the relative sliding between the steel beam and the concrete slab is limited, and the steel beam and the concrete slab cooperatively deform and work together to improve the whole bending rigidity and the bearing capacity of the section.
In the area of the steel-concrete composite structure bearing the negative bending moment, because of the existence of the shearing resistance of the traditional shear connector, the concrete slab on the upper part mainly bears the tensile force, and the steel beam on the lower part mainly bears the pressure, at the moment, the respective advantages of concrete materials and steel materials cannot be exerted in the structural stress mode, and the steel-concrete composite structure is contrary to the original intention of adopting the composite structure. The use of the uplift-resistant non-shear connection peg allows slippage between two parts of a steel beam and a concrete slab in a steel-concrete composite structure, so that the shearing force transmitted to the concrete slab in a hogging moment area of the composite structure is reduced, and the structural stress performance of the area is effectively improved. The novel concrete slab shear force releasing device embodies the transformation from the traditional concept of resisting the tensile stress of the concrete slab to the novel concept of releasing the shear force in the concrete slab. At present, various types of anti-pulling and anti-shearing shear connectors are proposed, such as an anti-pulling and anti-shearing shear connector of a rubber sleeve, a T-shaped anti-pulling and anti-shearing shear connector and a screw type anti-pulling and anti-shearing shear connector, and the above anti-pulling and anti-shearing connectors all have the following defects: 1. the connecting piece is extruded by concrete static load, and the connecting piece is easily damaged in the long-time extrusion process; 2. the connecting piece is not tightly connected with the concrete, and the pulling resistance of the connecting piece is low.
Disclosure of Invention
In view of the technical problems in the prior art, the invention aims to provide a connecting piece which is resistant to pulling and shearing. The connecting piece increases the friction force between the bridge deck and the steel beam and improves the pulling strength of the connecting piece.
Another object of the present invention is to provide a construction method of a connecting member which is resistant to pulling and shearing. The construction method can improve the pulling strength of the connecting piece and is simple to operate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a connecting piece that resistance to plucking is not anti, includes peg, sleeve pipe, goes up gasket and gasket down, the peg cup joints in the sleeve pipe, go up the gasket and cup joint respectively in sheathed tube both ends with gasket down, the external diameter at the middle part of peg is less than sheathed tube internal diameter, the sleeve pipe includes first semicircle pipe and second semicircle pipe, first semicircle pipe and second semicircle pipe set up relatively, just first semicircle pipe and second semicircle pipe concatenation shaping, the both ends of first semicircle pipe and second semicircle pipe all are equipped with the flange limit, it all is located the inner on flange limit with gasket down to go up the gasket.
Preferably, the outer diameter of the middle part of the peg becomes gradually smaller relative to the two ends of the peg, and the middle part of the peg is stepped.
Preferably, the outer diameter of the middle part of the stud is gradually reduced relative to the two ends of the stud, and the middle part of the stud is in a circular truncated cone shape.
Preferably, the cross-sectional area of the middle part of the peg accounts for more than 80% of the cross-sectional area of the two ends of the peg.
Preferably, the corresponding flange edge is perpendicular to the pipe wall of the first semicircular pipe or the second semicircular pipe respectively.
Preferably, the connecting piece further comprises an upper nut and a lower nut, and the upper nut and the lower nut are respectively in threaded connection with two ends of the stud.
Preferably, the diameter of the flange edge is larger than the diameter of the circumscribed circle of the upper nut or the lower nut.
A construction method of a connecting piece resisting pulling and shearing comprises the following steps:
s1, presetting a connecting hole on the steel beam, inserting the stud into one end of the steel beam, and fixing the lower end of the stud by a bracket;
s2, pouring concrete at the other end of the steel beam, wherein the pouring height of the concrete is flush with the upper gasket of the sleeve, and after the concrete is solidified, the upper nut and the lower nut of the stud are screwed down respectively;
and S3, chiseling the surface of the concrete block, and pouring concrete again to finish the construction of the connecting piece.
Preferably, in S2, the concrete is poured and vibrated uniformly, and the cured concrete reaches the design grade.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the connecting piece with the pulling resistance and the non-shearing resistance, the outer diameter of the middle part of the stud of the connecting piece is smaller than the inner diameter of the sleeve, the stud is changed into the middle reserved space to be combined with the sleeve, so that the sleeve deforms due to the interaction between concrete and the connecting piece, and the concrete is extruded into the reserved space, and the pulling resistance strength of the bridge deck and the steel beam is enhanced.
2. According to the connecting piece with the pulling resistance and the non-shearing resistance, due to the pressure born by the concrete or the expansion and contraction effect of the concrete, the sleeve of the connecting piece deforms under the pressure of the concrete in the process of generating deformation, and the damage process of the concrete can be relieved by the deformation of the sleeve.
3. According to the connecting piece with the pulling resistance and the non-shearing resistance, the flange edges are arranged at the two ends of the first semicircular tube and the second semicircular tube of the connecting piece, and the upper gasket and the lower gasket are positioned at the inner ends of the flange edges, so that the bridge deck and the steel beam are combined more tightly under the condition that the studs are pressed.
4. The construction method of the connecting piece with the resistance to pulling and the non-shearing property adopts sectional type pouring concrete, can enhance the resistance to pulling strength of the connecting piece to the maximum extent, is simple to operate, and has low requirement on the precision of the mounting hole of the connecting piece.
Drawings
FIG. 1 is a schematic view of a connector of the present invention that resists pullout and shear.
FIG. 2 is a schematic view of a sleeve of a pullout resistant, non-shear connector of the present invention.
FIG. 3 is a schematic view of the connection of a connector of the present invention to a concrete block.
Fig. 4 is a schematic illustration of a stud for a pullout and shear resistant connection according to an embodiment of the invention.
Fig. 5 is a schematic illustration of a stud for a pullout and shear resistant connection according to a second embodiment of the invention.
The concrete block comprises a bolt 1, a stepped bolt 101, a truncated cone 102, a sleeve 2, a first semicircular pipe 201, a second semicircular pipe 202, a flange 203, an upper gasket 3, a lower gasket 4, an upper nut 5, a lower nut 6, a steel beam 7 and a concrete block 8.
Detailed Description
The following describes the object of the present invention in further detail with reference to the drawings and specific examples, which are not repeated herein, but the embodiments of the present invention are not limited to the following examples.
Example one
As shown in fig. 1 to 3, a connecting member for resisting pulling and shearing comprises a stud 1, a sleeve 2, an upper gasket 3 and a lower gasket 4, wherein the stud 1 is sleeved on the sleeve 2, the upper gasket 3 and the lower gasket 4 are respectively sleeved on two ends of the sleeve 2, the outer diameter of the middle part of the stud 1 is smaller than the inner diameter of the sleeve 2, so that the middle part of the stud 1 has a reserved space, the sleeve 2 comprises a first semicircular tube 201 and a second semicircular tube 202, the first semicircular tube 201 and the second semicircular tube 202 are oppositely arranged and are spliced for convenient field installation operation, when the first semicircular tube 201 and the second semicircular tube 202 are sleeved on the stud 1, slurry liquid for pouring concrete into the stud 1 cannot penetrate into the reserved space, so that the reserved space of the stud 1 is prevented from being eroded by the slurry, two ends of the first semicircular tube 201 and the second semicircular tube 202 are respectively provided with a flange 203, the upper gasket 3 and the lower gasket 4 are both located at the inner end of the flange edge 203, which is a position between two ends of the first semicircular pipe 201 and the second semicircular pipe 202. After the connecting piece installation, go up gasket 3 and lower gasket 4 and offset with concrete block 8, increase the frictional force of concrete block 8 and connecting piece, thereby increase the resistance to plucking performance of connecting piece, the external diameter at the middle part of the peg 1 of this connecting piece is less than the internal diameter of sleeve pipe 2, change peg 1 into middle part headspace and sleeve pipe 2 combination, interact between messenger's concrete block 8 and the connecting piece leads to sleeve pipe 2 to warp, let concrete block 8 extrude to in the headspace, thereby strengthened the resistance to plucking intensity of decking and girder steel 7.
As shown in fig. 4, the outer diameter of the middle portion of the peg 1 becomes gradually smaller with respect to both ends of the peg 1, and the middle portion of the peg 1 is stepped 101. The middle part of the stud 1 is reserved with a buffer area, and because of the pressure born by the concrete in the concrete block 8 or the heat expansion and cold contraction effect of the concrete, the sleeve 2 of the connecting piece deforms when being subjected to the concrete pressure, and the concrete compresses to the buffer area, so that the damage process of the concrete is relieved by the deformation of the sleeve 2. The cross section area of the middle part of the stud 1 accounts for more than 80% of the cross section area of the two ends of the stud 1, so that the stud 1 cannot be broken due to too low structural rigidity of the middle part of the stud 1 when a connecting piece is pulled.
The corresponding flange 203 is perpendicular to the wall of the first semicircular pipe 201 or the second semicircular pipe 202. The flange limit 203 increases the tightness of being connected of sleeve pipe 2 and peg 1, adopts last gasket 3 and lower gasket 4 to carry flange limit 203, and the pipe wall of flange limit 203 and first semicircle pipe 201 or second semicircle pipe 202 is perpendicular, can let flange limit 203 and last gasket 3 and lower gasket 4 laminating inseparable, when last nut 5 and lower nut 6 screwed up simultaneously, flange limit 203 increases sleeve pipe 2 and peg 1's structural integrity and stability.
The connecting piece also comprises an upper nut 5 and a lower nut 6, wherein the upper nut 5 and the lower nut 6 are respectively in threaded connection with two ends of the stud 1. The upper nut 5 is used for screwing the connecting piece on the contact surface of the concrete block 8, and the lower nut 6 is used for screwing the connecting piece on the contact surface of the steel beam 7, so that the connecting piece has the function of fixing the concrete block 8 and the steel beam 7 at the same time.
The diameter of the flange edge 203 is larger than the diameter of the circumscribed circle of the upper nut 5 or the lower nut 6. The action surface for screwing the stud 1 by the upper nut 5 and the lower nut 6 is larger, and the structure of the flange edge 203 is not damaged.
A construction method of a connecting piece resisting pulling and shearing comprises the following steps:
s1, presetting a connecting hole on the steel beam 7, inserting the connecting piece into one end of the steel beam 7, and fixing the lower end of the connecting piece by adopting a bracket; the connecting piece is prevented from falling.
S2, pouring concrete at the other end of the steel beam 7, wherein the pouring height of the concrete is flush with the upper gasket 3 at the upper end of the sleeve 2, after the concrete is solidified, a concrete block 8 is formed, and the upper nut 5 and the lower nut 6 of the connecting piece are screwed tightly respectively;
and S3, chiseling the surface of the concrete block 8, and pouring concrete again to finish the construction. And the groove removing treatment is adopted for tightly connecting the concretes poured at different stages and increasing the friction force between the concretes poured at different stages.
In S2, the concrete is poured and vibrated uniformly, and the cured concrete reaches the design grade. When the concrete is cured to reach the designed mechanism, the concrete is basically solidified and formed, so that the problem that the connection between the concrete and the connecting piece is not tight enough in the initial stage is solved.
The concrete pouring in the construction method is divided into two steps, the concrete and the connection are seamlessly and fixedly connected by adopting a staged method, the concrete is uniformly vibrated after being poured in the first step, so that the connection strength of the connecting piece and the concrete is effectively ensured, the concrete is poured in the second step again, the pulling strength of the connecting piece can be enhanced to the maximum extent, the operation is simple, and the required precision of the reserved mounting hole of the steel beam 7 is not high.
Example two
The connecting piece resisting pulling and shearing is the same as the first embodiment except for the following technical characteristics:
as shown in fig. 5, the outer diameter of the middle part of the peg 1 is gradually reduced relative to the two ends of the peg 1, and the middle part of the peg 1 is in a truncated cone shape 102. The middle part of the stud 1 is reserved with a buffer area, and due to the pressure born by the concrete or the expansion and contraction effect of the concrete, the sleeve 2 of the connecting piece deforms when being subjected to the pressure of the concrete, and the concrete compresses to the buffer area, so that the damage process of the concrete is relieved by the deformation of the sleeve 2. The cross section area of the middle part of the stud 1 accounts for more than 80% of the cross section area of the two ends of the stud 1, so that the stud 1 cannot be broken due to too low structural rigidity of the middle part of the stud 1 when a connecting piece is pulled.
The above-mentioned embodiments are preferred embodiments of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions that do not depart from the technical spirit of the present invention are included in the scope of the present invention.
Claims (9)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624517.8A CN113373791A (en) | 2021-06-04 | 2021-06-04 | Anti-pulling and non-shearing connecting piece and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110624517.8A CN113373791A (en) | 2021-06-04 | 2021-06-04 | Anti-pulling and non-shearing connecting piece and construction method |
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| CN113373791A true CN113373791A (en) | 2021-09-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113684932A (en) * | 2021-09-30 | 2021-11-23 | 西安建筑科技大学 | Two-stage stress bolt group and construction method thereof |
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Application publication date: 20210910 |
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