CN203008236U - SCS (steel concrete structure) concrete-filled steel tube structure with vertical reinforcing structure in internal whole length - Google Patents

Abstract

The utility model discloses an SCS steel pipe concrete structure with a longitudinal stiffening structure arranged throughout its length, comprising an outer steel pipe, an inner steel pipe, multiple longitudinal stiffening ribs arranged on the inner side wall of the outer steel pipe, and filled between the outer steel pipe and the inner steel pipe. The concrete structure formed by pouring concrete in the space cavity; the outer steel pipe and the inner steel pipe are arranged coaxially; multiple longitudinal stiffeners are arranged along the circumferential direction of the inner steel pipe; the longitudinal length of the outer steel pipe, inner steel pipe and multiple longitudinal stiffeners are the same; and the transverse width of each longitudinal stiffener is equal to the distance between the outer steel pipe and the inner steel pipe at the position where it is laid.

The utility model is simple in structure, reasonable in design, convenient in construction, low in construction cost, excellent in mechanical properties and good in use effect, and can effectively solve the problems of self-heaviness, poor connection performance between the outer steel pipe and the inner concrete in the existing steel pipe concrete structure, and Issues such as the small hoop effect of the outer steel pipe on the inner concrete.

Description

A SCS steel tube concrete structure with longitudinal stiffening structure laid out throughout its length

technical field

The utility model relates to a steel pipe concrete structure, in particular to an SCS steel pipe concrete structure in which a longitudinal stiffening structure is arranged throughout the length of the interior.

Background technique

Concrete filled steel pipe refers to the structure formed after the steel pipe is filled with concrete. The two materials of steel and concrete make up for each other's weaknesses and give full play to each other's strengths, so that the steel tube concrete has a high bearing capacity and has excellent mechanical properties. Nowadays, CFST structures are more and more widely used in structures such as offshore platforms, long-span, heavy-duty, and light bridges, and the CFST structures used mainly have circular, square, and rectangular cross-sectional forms. However, currently used concrete-filled steel tube structures generally have defects such as structural weight, which limits the development and application of steel tube concrete structures to a large extent.

In addition, after the perforated stiffeners (referred to as PBL stiffeners) are arranged in the steel pipe, it not only improves the compressive strength of the core concrete, but also enhances the stability of the steel pipe wall; at the same time, the perforated stiffener acts as a shear member. The steel pipe and concrete are connected as a whole, and the combined effect of steel and concrete is improved. But in actual use, the buckling of the steel pipe is directly related to the stiffness of the PBL stiffener, so it is not easy to control, and the structure has a heavy weight.

To sum up, there are several problems in the existing concrete-filled steel tube structures: first, the outer steel tube has a weak hoop effect on the concrete, which is prone to local buckling, and the composite structure formed by the steel tube and concrete is not integral enough; second, The self-weight is too large, which limits the size of the structure; third, the fire resistance of steel is poor.

Utility model content

The technical problem to be solved by the utility model is to provide a SCS steel pipe concrete structure with a longitudinal stiffening structure laid out throughout the length of the interior, which has a simple structure, reasonable design, convenient construction and low construction cost. It has excellent performance and good use effect, and can effectively solve the problems existing in the existing steel pipe concrete structure, such as self-heaviness, poor connection performance between the outer steel pipe and the inner concrete, and the small hoop effect of the outer steel pipe on the inner concrete.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an SCS steel pipe concrete structure with a longitudinal stiffening structure arranged throughout its length, which is characterized in that it includes an outer steel pipe, an inner steel pipe set inside the outer steel pipe, and an outer steel pipe arranged on the outer The multiple longitudinal stiffeners on the inner wall of the steel pipe and the concrete structure formed by pouring the concrete filled in the cavity between the outer steel pipe and the inner steel pipe after the multiple longitudinal stiffeners are laid out, the inner steel pipe is a round shaped steel pipe and it is arranged in the middle part of the inner side of the outer steel pipe; the outer steel pipe and the inner steel pipe are arranged coaxially, and the arrangement direction of the multiple longitudinal stiffeners is consistent with the direction of the central axis of the inner steel pipe and the outer steel pipe, The plurality of longitudinal stiffeners are all tightly connected with the concrete structure; the longitudinal stiffeners are elongated steel ribs, and the plurality of longitudinal stiffeners are arranged along the circumferential direction of the inner steel pipe; the outer steel pipe 1. The longitudinal lengths of the inner steel pipe and the plurality of longitudinal stiffeners are the same, and the top ends of the outer steel pipe and the plurality of longitudinal stiffeners are flush with the top ends of the inner steel pipe, and the outer steel pipe The bottom end of the longitudinal stiffener and the bottom ends of the plurality of longitudinal stiffeners are all flush with the bottom end of the inner steel pipe; and the transverse width of each longitudinal stiffener is equal to the outer steel pipe and the inner spacing between steel pipes

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffening structure arranged throughout its length is characterized in that: the middle part of the elongated steel rib plate has a plurality of through holes from top to bottom, and the plurality of through holes are arranged in on the same line.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that: multiple longitudinal stiffeners are evenly laid out along the circumferential direction of the inner steel pipe.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffening structure arranged throughout its length is characterized in that: the outer diameter of the inner steel pipe is Φ102 mm to Φ2000 mm, the wall thickness of the outer steel pipe and the inner steel pipe are both 4 mm to 100 mm, and A1 : A2=1: (0.6～0.8), where A1=a1+b1, a1 is the cross-sectional area of the outer steel pipe and b1 is the cross-sectional area of the inner hollow part of the outer steel pipe, A2=π·r ² and r is the inner steel pipe the outer diameter.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that: each longitudinal stiffener is fixed on the inner side wall of the outer steel pipe by welding, and the concrete structure is a carbon fiber concrete structure.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that: the cross section of the outer steel pipe is circular, rectangular or regular polygonal.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that: the number of longitudinal stiffeners is 4 to 8.

The above-mentioned SCS steel pipe concrete structure with a longitudinal stiffening structure arranged throughout its length is characterized in that: a plurality of said through holes are evenly arranged from top to bottom, and the structures and sizes of the plurality of said through holes are all the same; The number of through holes and the arrangement positions of each through hole on the longitudinal stiffener are the same.

The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that it also includes multiple stirrups arranged on the multiple longitudinal stiffeners from top to bottom, and the multiple stirrups are parallel Arrangement, the number of the plurality of stirrups is the same as the number of the plurality of through holes, and the plurality of stirrups respectively pass through the plurality of through holes opened on each of the longitudinal stiffeners .

其中d3为所述圆形孔所处纵向加劲肋的横向宽度。The above-mentioned SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length is characterized in that: the thickness of multiple longitudinal stiffeners is the same, and the thickness of multiple longitudinal stiffeners is d1, where d1≤D , D is the wall thickness of the outer steel pipe; the larger the wall thickness of the outer steel pipe, the greater the thickness of the multiple longitudinal stiffeners; the through hole is a circular hole, and the aperture of the circular hole

Wherein d3 is the transverse width of the longitudinal stiffener where the circular hole is located.

Compared with the prior art, the utility model has the following advantages:

1. Simple structure, reasonable design and low construction cost.

2. The structure is light and the anti-seismic and torsional performance is good. At the same time, the use method is flexible, and it can be applied to structures such as pier columns, arch ribs, and beams.

3. The construction is convenient and the use effect is good. The SCS steel pipe concrete column structure formed by the construction has good mechanical properties and light structure. The inner and outer steel pipes are connected by poured concrete to form a whole. In actual use, the utility model can fully improve the self-heaviness and other defects of the steel pipe concrete structure. It uses the larger cross-sectional area of the outer steel pipe to provide a larger cross-sectional torsional and bending moment of inertia, and uses the inner steel pipe to effectively reduce the concrete volume. The self-weight is reduced, and the sandwich concrete is in a three-way compression state and the inner and outer steel pipes are connected as a whole. Therefore, the utility model can give full play to the advantages of simple form and easy construction of the steel pipe concrete joint, the relative moment of inertia of the section is relatively large, the performance of earthquake resistance and torsion resistance is good, and it can effectively overcome the poor connection performance between the steel pipe and its internal concrete. 1. The outer steel pipe has small hoop effect on the inner concrete. The utility model uses the built-in round steel pipe to enhance the hoop effect on the concrete, and uses the effective concrete volume of the inner steel pipe to reduce the self-weight.

4. The concrete poured between the inner and outer steel pipes can be either ordinary concrete or carbon fiber concrete. Moreover, the content of carbon fiber added in the carbon fiber concrete used is about 0.6% by mass, which can increase the tensile strength and tensile ductility of the concrete by 30% and 25% respectively. Carbon fiber is made of carbon fiber filaments through chopped mechanical cutting. The length is generally in mm, and the shape is a certain length of velvet. High performance, and has the advantages of uniform dispersion, various feeding methods, and simple process. Adding an appropriate amount of chopped carbon fiber to the concrete can improve the tensile strength, strength and impact resistance of the concrete, reduce drying shrinkage, and improve wear resistance. This concrete is lighter than ordinary concrete and has certain heat insulation properties and shock absorption performance. Compared with the steel pipe concrete structure in which the interior of the inner steel pipe and the space formed between the inner steel pipe and the outer steel pipe are all filled with concrete, the utility model can make full use of the strength of the built-in round steel pipe.

5. Use open-hole stiffeners to enhance the out-of-plane stability of the outer steel pipe, and correspondingly greatly enhance the shear resistance of the structure, and at the same time tightly connect the various components of the entire steel pipe concrete structure into a whole. Combined with multiple stirrups, the multiple open-hole stiffeners are organically connected as a whole, which further enhances the integrity of the entire CFST structure. The perforated stiffeners not only improve the compressive strength of the core concrete, but also enhance the stability of the pipe wall; at the same time, the perforated stiffeners act as shear members, connecting the steel pipe and concrete as a whole, improving the strength of steel and concrete. combination effect. Moreover, the utility model has strong operability, and can effectively solve the problem that the bending time of the steel pipe is not easy to control due to the relationship between the stiffness of the opening stiffener.

To sum up, the utility model has the advantages of simple structure, reasonable design, convenient construction, low construction cost, excellent mechanical properties and good use effect, and can effectively solve the problems of self-heaviness and the gap between the outer steel tube and the inner concrete in the existing steel tube concrete structure. There are many problems such as poor connection performance of the steel tube and the small hoop effect of the outer steel pipe on the inner concrete.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of the present utility model.

Fig. 2 is a schematic diagram of the internal structure of Embodiment 1 of the present utility model.

Fig. 3 is a schematic diagram of the top structure of Embodiment 1 of the present utility model.

Fig. 4 is a schematic structural diagram of Embodiment 2 of the present utility model.

Fig. 5 is a schematic structural diagram of Embodiment 3 of the present utility model.

Fig. 6 is a schematic structural view of Embodiment 4 of the present utility model.

Fig. 7 is a schematic structural diagram of Embodiment 5 of the present utility model.

Fig. 8 is a schematic structural diagram of Embodiment 6 of the present utility model.

Fig. 9 is a schematic structural view of Embodiment 7 of the present utility model.

Explanation of reference signs:

1—outer steel pipe; 2—inner steel pipe; 3—longitudinal stiffener;

4—concrete structure; 5—through hole; 6—stirrup.

Detailed ways

Example 1

As shown in Fig. 1, Fig. 2 and Fig. 3, the utility model comprises an outer steel pipe 1, an inner steel pipe 2 set inside the outer steel pipe 1, multiple longitudinal stiffeners 3 arranged on the inner wall of the outer steel pipe 1, and multiple After the longitudinal stiffeners 3 are all laid out, the concrete structure 4 formed by pouring the concrete filled in the cavity between the outer steel pipe 1 and the inner steel pipe 2, the inner steel pipe 2 is a circular steel pipe and it is laid on the outer steel pipe 1 inner middle. The outer steel pipe 1 and the inner steel pipe 2 are arranged coaxially, and the layout direction of the plurality of longitudinal stiffeners 3 is consistent with the direction of the central axis of the inner steel pipe 2 and the outer steel pipe 1, and the plurality of longitudinal stiffeners 3 are all fastened and connected with the concrete structure 4 as a whole. The longitudinal stiffeners 3 are elongated steel ribs, and multiple longitudinal stiffeners 3 are arranged along the circumferential direction of the inner steel pipe 2 . The longitudinal lengths of the outer steel pipe 1, the inner steel pipe 2 and the plurality of longitudinal stiffeners 3 are the same, and the top of the outer steel pipe 1 and the tops of the plurality of longitudinal stiffeners 3 are all the same as those of the inner steel pipe 2. The top ends are flush, and the bottom ends of the outer steel pipe 1 and the plurality of longitudinal stiffeners 3 are flush with the bottom ends of the inner steel pipe 2 . And the transverse width of each longitudinal stiffener 3 is equal to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

In this embodiment, a plurality of through holes 5 are opened from top to bottom in the middle of the elongated steel rib plate, and the plurality of through holes 5 are arranged on the same straight line.

During actual processing, the outer diameter of the inner steel pipe 2 is Φ102mm-2000mm, the wall thickness of the outer steel pipe 1 and the inner steel pipe 2 are both 4mm-100mm, and A1:A2=1:(0.6-0.8), where A1 =a1+b1, a1 is the cross-sectional area of the outer steel pipe 1 and b1 is the cross-sectional area of the hollow part inside the outer steel pipe 1, A2=π·r ² and r is the outer diameter of the inner steel pipe 2.

In this embodiment, the outer diameter of the inner steel pipe 2 is 200mm and its wall thickness is 15mm. In actual use, the outer diameter of the inner steel pipe 2 can be adjusted in the range of Φ102 mm to Φ2000 mm, and the wall thickness of the inner steel pipe 2 can be adjusted in the range of 4 mm to 100 mm according to specific needs.

During actual processing, the cross section of the outer steel pipe 1 is circular, rectangular or regular polygonal.

In this embodiment, the cross section of the outer steel pipe 1 is square.

During specific processing, the cross-section of the outer steel pipe 1 may also adopt a shape such as a rectangle, a circle, or other regular polygons.

In this embodiment, A1:A2=1:0.7. In actual use, the ratio of A1:A2 can be adjusted within the range of 1:(0.6-0.8) according to specific needs.

In this embodiment, the concrete structure 4 is a carbon fiber concrete structure.

In actual processing, A1 is preferably 4m ² -10m ² , and the wall thicknesses of the outer steel pipe 1 and the inner steel pipe 2 are preferably 18mm-25mm.

In this embodiment, A1=D ² =6m ² , where D is the side length of the outer wall of the outer steel pipe 1 , and the wall thickness of the outer steel pipe 1 is 20mm. In actual use, A1 can be adjusted in the range of 4m ² to 10m ² according to specific needs, and the wall thickness of the outer steel pipe 1 can be adjusted in the range of 4mm to 100mm.

During actual construction, when the constructed steel pipe concrete structure is used in building construction, bridges and other fields, the wall thicknesses of the inner steel pipe 2 and the outer steel pipe 1 are preferably adjusted accordingly within the range of 4 mm to 66 mm. When the constructed steel pipe concrete structure is used on an offshore platform, the wall thicknesses of the inner steel pipe 2 and the outer steel pipe 1 are preferably adjusted within the range of 12 mm to 100 mm.

During actual manufacturing, multiple longitudinal stiffeners 3 are evenly arranged along the circumferential direction of the inner steel pipe 2 . The number of the longitudinal stiffeners 3 is 4-8.

In this embodiment, the number of the plurality of longitudinal stiffeners 3 is four, and the four longitudinal stiffeners 3 are respectively fixed in the middle of the four side walls of the outer steel pipe 1 .

Moreover, each of the longitudinal stiffeners 3 is fixed on the inner side wall of the outer steel pipe 1 by welding.

In this embodiment, the concrete structure 4 is a carbon fiber concrete structure.

In this embodiment, the plurality of through holes 5 are uniformly arranged from top to bottom, and the structures and sizes of the plurality of through holes 5 are the same. The number of through holes 5 opened on the multiple longitudinal stiffeners 3 and the layout positions of each through hole 5 are the same.

At the same time, it also includes a plurality of stirrups 6 arranged on the plurality of longitudinal stiffeners 3 from top to bottom, the plurality of stirrups 6 are arranged in parallel, and the number of the plurality of stirrups 6 is the same as that of the plurality of stirrups. The number of said through holes 5 is the same, and a plurality of said stirrups 6 respectively pass through a plurality of said through holes 5 opened on each of said longitudinal stiffeners 3 .

其中d3为所述圆形孔所处纵向加劲肋3的横向宽度。In this embodiment, the multiple longitudinal stiffeners 3 have the same thickness, and the multiple longitudinal stiffeners 3 have a thickness d1, where d1≤D, where D is the wall thickness of the outer steel pipe 1 . The greater the wall thickness of the outer steel pipe 1 is, the greater the thickness of the plurality of longitudinal stiffeners 3 is. The through hole 5 is a circular hole, and the aperture of the circular hole

Wherein d3 is the transverse width of the longitudinal stiffener 3 where the circular hole is located.

的范围内进行相应调整。并且，可以根据具体需要，将每一道所述纵向加劲肋3的横向宽度在其所布设位置处外钢管1和内钢管2之间间距的

之间进行相应调整。同时，可以根据具体需要，对所述纵向加劲肋3和所述箍筋6的数量进行相应调整。During actual processing and production, the aperture d2 of the circular hole can be set at

Adjust accordingly. And, according to specific needs, the transverse width of each longitudinal stiffener 3 can be adjusted to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

Adjust accordingly. At the same time, the numbers of the longitudinal stiffeners 3 and the stirrups 6 can be adjusted accordingly according to specific needs.

During actual processing, when the cross-section of the outer steel pipe 1 is a rectangle or a regular polygon, multiple longitudinal stiffeners 3 are respectively arranged in the middle of each side wall of the outer steel pipe 1 .

Example 2

As shown in Figure 4, in this embodiment, the difference from Embodiment 1 is: the cross section of the outer steel pipe 1 is circular, A1:A2=1:0.6, the walls of the outer steel pipe 1 and the inner steel pipe 2 The thickness is 25mm, A1=π·R ² =10m ² , where R is the outer diameter of the outer steel pipe 1 .

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 3

As shown in FIG. 5 , in this embodiment, the difference from Embodiment 2 is that the number of the longitudinal stiffeners 3 is six.

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 2.

Example 4

As shown in Figure 6, in this embodiment, the difference from Embodiment 2 is that the cross section of the outer steel pipe 1 is a regular hexagonal shape, and the cross section of the inner hollow part of the outer steel pipe 1 is a regular hexagonal hole , and A1=the cross-sectional area of the outer steel pipe 1+the cross-sectional area of the regular hexagonal hole; the number of the longitudinal stiffeners 3 is 8, and the longitudinal stiffeners 3 of the 8 roads are respectively fixed In the middle of 8 side walls of the outer steel pipe 1.

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 2.

Example 5

As shown in Figure 7, in this embodiment, the difference from Embodiment 1 is that the cross-section of the outer steel pipe 1 is a regular hexagon, A1:A2=1:0.8, the outer steel pipe 1 and the inner steel pipe 2 The wall thickness is 25mm, A1=10m ² , the cross-section of the inner hollow part of the outer steel pipe 1 is a regular hexagonal hole, and A1=the cross-sectional area of the outer steel pipe 1+the cross-sectional area of the regular hexagonal hole; The number of the longitudinal stiffeners 3 is 6, and the 6 longitudinal stiffeners 3 are respectively fixed in the middle of the 6 side walls of the outer steel pipe 1 . In actual use, the cross section of the outer steel pipe 1 can also be other regular polygons.

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 6

As shown in Figure 8, in this embodiment, the difference from Embodiment 1 is that the cross section of the outer steel pipe 1 is a regular octagon, wherein the cross section of the inner hollow part of the outer steel pipe 1 is a regular octagon hole, and A1 =The cross-sectional area of the outer steel pipe 1+the cross-sectional area of the regular octagonal hole; the number of the longitudinal stiffeners 3 is 8, and the 8 longitudinal stiffeners 3 are respectively fixed on 8 of the outer steel pipe 1 middle of a side wall.

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 7

As shown in Figure 9, in this embodiment, the difference from Embodiment 9 is that: the number of the longitudinal stiffeners 3 is four, and the four longitudinal stiffeners 3 are respectively fixed on the four side walls of the outer steel pipe 1 middle part.

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 9.

Example 8

所述圆形孔的孔径d2为

所述内钢管2的外径为Φ102mm，所述外钢管1和内钢管2的壁厚均为4mm，A1=4m²。In this embodiment, the difference from Embodiment 1 is that the transverse width of each longitudinal stiffener 3 is equal to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

The aperture d2 of the circular hole is

The outer diameter of the inner steel pipe 2 is Φ102mm, the wall thicknesses of the outer steel pipe 1 and the inner steel pipe 2 are both 4mm, and A1=4m ² .

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 9

所述圆形孔的孔径d2为所述内钢管2的外径为1000mm，所述外钢管1和内钢管2的壁厚均为40mm，A1=8m²。In this embodiment, the difference from Embodiment 1 is that the transverse width of each longitudinal stiffener 3 is equal to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

The aperture d2 of the circular hole is The outer diameter of the inner steel pipe 2 is 1000mm, the wall thickness of the outer steel pipe 1 and the inner steel pipe 2 are both 40mm, and A1=8m ² .

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 10

所述圆形孔的孔径d2为

所述内钢管2的外径为2000mm，所述外钢管1和内钢管2的壁厚均为66mm，A1=10m²。In this embodiment, the difference from Embodiment 1 is that the transverse width of each longitudinal stiffener 3 is equal to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

The aperture d2 of the circular hole is

The outer diameter of the inner steel pipe 2 is 2000mm, the wall thicknesses of the outer steel pipe 1 and the inner steel pipe 2 are both 66mm, and A1=10m ² .

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

Example 11

所述圆形孔的孔径d2为所述内钢管2的外径为2000mm，所述外钢管1和内钢管2的壁厚均为100mm，A1=10m²。In this embodiment, the difference from Embodiment 1 is that the transverse width of each longitudinal stiffener 3 is equal to the distance between the outer steel pipe 1 and the inner steel pipe 2 at the position where it is arranged.

The aperture d2 of the circular hole is The outer diameter of the inner steel pipe 2 is 2000mm, the wall thicknesses of the outer steel pipe 1 and the inner steel pipe 2 are both 100mm, and A1=10m ² .

In this embodiment, the structures and connections of other parts are the same as those in Embodiment 1.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (10)

1. A SCS steel pipe concrete structure with longitudinal stiffening structure arranged throughout its length, characterized in that it includes an outer steel pipe (1), an inner steel pipe (2) set inside the outer steel pipe (1), and an outer steel pipe (1) The multiple longitudinal stiffeners (3) on the inner wall and the multi-channel longitudinal stiffeners (3) are all laid out by pouring concrete filled in the cavity between the outer steel pipe (1) and the inner steel pipe (2) Formed concrete structure (4), the inner steel pipe (2) is a circular steel pipe and it is arranged in the middle of the inner side of the outer steel pipe (1); the outer steel pipe (1) and the inner steel pipe (2) are arranged coaxially, And the laying directions of the plurality of longitudinal stiffeners (3) are consistent with the direction of the central axis of the inner steel pipe (2) and the outer steel pipe (1), and the plurality of longitudinal stiffeners (3) are all aligned with the concrete structure ( 4) fastened and connected as one; the longitudinal stiffeners (3) are elongated steel ribs, and multiple longitudinal stiffeners (3) are arranged along the circumferential direction of the inner steel pipe (2); the outer steel pipe (1), the longitudinal lengths of the inner steel pipe (2) and the plurality of longitudinal stiffeners (3) are the same, and the top of the outer steel pipe (1) and the top ends of the plurality of longitudinal stiffeners (3) are the same as The top end of the inner steel pipe (2) is flush with each other, and the bottom end of the outer steel pipe (1) and the bottom ends of the plurality of longitudinal stiffeners (3) are all aligned with the bottom end of the inner steel pipe (2). and the transverse width of each longitudinal stiffener (3) is equal to the distance between the outer steel pipe (1) and the inner steel pipe (2) at the position where it is laid.

2. According to claim 1, a kind of SCS steel pipe concrete structure with longitudinal stiffening structure laid out throughout the length of the interior is characterized in that: the middle part of the elongated steel rib plate is provided with a plurality of through holes (5 ), and a plurality of through holes (5) are arranged on the same straight line. 3. According to claim 1 or 2, an SCS steel pipe concrete structure with longitudinal stiffening structure laid out throughout its length, is characterized in that: multiple longitudinal stiffening ribs (3) are formed along the circumferential direction of the inner steel pipe (2). Spread evenly. 4. According to claim 1 or 2, an SCS steel pipe concrete structure with a longitudinal stiffening structure laid out throughout its length, is characterized in that: the outer diameter of the inner steel pipe (2) is 102 mm to Φ2000 mm, and the outer steel pipe ( 1) and the wall thickness of the inner steel pipe (2) are both 4mm~100mm, and A1:A2=1:(0.6~0.8), where A1=a1+b1, a1 is the cross-sectional area of the outer steel pipe (1) and b1 is the cross-sectional area of the inner hollow part of the outer steel pipe (1), A2=π·r ² and r is the outer diameter of the inner steel pipe (2). 5. According to claim 1 or 2, an SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout its length, is characterized in that: each of the longitudinal stiffeners (3) is fixed on the outer steel pipe (1) by welding On the inner side wall of , the concrete structure (4) is a carbon fiber concrete structure. 6. The SCS concrete-filled steel tube structure with longitudinal stiffeners arranged throughout the length of the interior according to claim 1 or 2, characterized in that: the cross-section of the outer steel tube (1) is circular, rectangular or regular polygonal. 7. The SCS steel pipe concrete structure with longitudinal stiffeners arranged throughout the length of the interior according to claim 1 or 2, characterized in that: the number of said longitudinal stiffeners (3) is 4-8. 8. According to claim 2, an SCS steel pipe concrete structure with a longitudinal stiffening structure laid out throughout its length, is characterized in that: a plurality of said through holes (5) are evenly arranged from top to bottom, and a plurality of said The structures and sizes of the through holes (5) are the same; the number of the through holes (5) on the plurality of longitudinal stiffeners (3) and the layout positions of the through holes (5) are the same. 9. According to claim 8, the SCS steel pipe concrete structure with longitudinal stiffeners laid out throughout its length is characterized in that it also includes multiple lines of vertical stiffeners (3) arranged from top to bottom. Stirrups (6), the plurality of stirrups (6) are arranged in parallel, the number of the plurality of stirrups (6) is the same as the number of the plurality of through holes (5), and the plurality of stirrups The ribs (6) respectively pass through the plurality of through holes (5) opened on each of the longitudinal stiffeners (3). 10. According to claim 2, an SCS steel pipe concrete structure with longitudinal stiffeners laid out throughout the length of the interior is characterized in that: the thickness of multiple longitudinal stiffeners (3) is the same, and the multiple longitudinal stiffeners The thickness of the ribs (3) is d1, where d1≤D, D is the wall thickness of the outer steel pipe (1); the greater the wall thickness of the outer steel pipe (1), the more longitudinal stiffeners (3) The thickness is larger; the through hole (5) is a circular hole, and the diameter of the circular hole

Where d3 is the transverse width of the longitudinal stiffener (3) where the circular hole is located.

Images