Novel double-steel-plate concrete composite wall structure for bridge tower

Abstract

The utility model relates to a novel double steel plate concrete composite wall structure for a bridge tower, which comprises a shear wall system, two ends of the shear wall system are connected with steel-concrete composite columns through high-strength bolts, and the shear wall system comprises two wall steel plates which are arranged in parallel. A plurality of longitudinal partition plates are erected between the two wall body steel plates at intervals in the length direction of the wall body steel plates, the longitudinal partition plates are vertically and fixedly connected to the two wall body steel plates, a plurality of round lightening holes are formed in the longitudinal partition plates, and in-wall concrete is poured between the two wall body steel plates and the longitudinal partition plates. Longitudinal partition plates with lightening holes are arranged in the shear wall system to serve as stiffening ribs, and long studs serve as connecting pieces of a wall steel plate and concrete in the wall, so that the wall can be divided into a plurality of cavities, the construction form is simple, the stress of the connecting pieces is clear, the material consumption is reduced, and the construction cost is reduced. And the strength, ductility, corrosion resistance and fireproof performance of the structure are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of building structures, in particular to a novel double steel plate concrete composite wall structure facing a bridge tower. Background Art

[0002] In a cable-supported bridge, the bridge tower is a crucial part. It not only bears the load from the bridge superstructure, but also provides the necessary rigidity to ensure the stability and safety of the bridge.

[0003] As a new type of bridge structure, double steel plate concrete composite bridge tower has been widely used and paid attention to at home and abroad in recent years. Its advantage is that it combines the advantages of concrete and steel materials. It has the characteristics of high bearing capacity, good ductility and simple construction. It also has the advantages of strong anti-buckling ability, high rigidity and less steel consumption of steel structure bridge tower, and has broad application prospects.

[0004] However, although the double steel plate concrete composite bridge tower has achieved certain practical results, the current research on it is still in its infancy. When applied to large-span cable-supported bridges, the double steel plate concrete composite bridge tower still faces some major problems and challenges. For example, the stress mechanism of the cavity steel module is still unclear, resulting in a complex tower wall structure and unclear force distribution of the connectors; the material strength is low, resulting in large cross-sectional dimensions, large material consumption, and strong seismic forces; the steel plate has poor corrosion resistance and fire resistance, resulting in a series of problems such as complex anti-corrosion and fire prevention measures and complicated structures of the upper and lower connection sections of the bridge tower. Utility Model Content

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a new double steel plate concrete composite wall structure facing the bridge tower, which can not only reduce the dead weight of the structure and simplify the force mechanism, but also meet the requirements of structural bearing capacity, rigidity, corrosion resistance, fire resistance and seismic resistance, while ensuring that the construction method is convenient and quick.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a new double steel plate concrete composite wall structure facing the bridge tower, including a shear wall system, both ends of the shear wall system are connected with steel-concrete composite columns through high-strength bolts, the shear wall system includes two parallel wall steel plates, a number of longitudinal partitions are arranged between the two wall steel plates along their length directions, the longitudinal partitions are vertically fixed to the two wall steel plates, a number of circular weight-reducing holes are opened on the longitudinal partitions, and wall concrete is poured between the two wall steel plates and the longitudinal partitions.

[0007] Furthermore, connecting steel plates are vertically arranged between the ends of the two wall steel plates, and the connecting steel plates are provided with threaded holes for high-strength bolts to pass through and connect with the steel-concrete composite columns.

[0008] Furthermore, studs are arranged opposite to each other on the inner walls of the two wall steel plates, and the studs are long studs with a length-to-diameter ratio of 8.

[0009] Furthermore, the steel-concrete composite column consists of a square steel pipe and column concrete poured in the square steel pipe.

[0010] Furthermore, the concrete inside the column and the concrete inside the wall are both made of high-strength concrete with a cylindrical compressive strength greater than 90 MPa.

[0011] Furthermore, the square steel pipe and the outer walls of the two wall steel plates are coated with a thermal insulation and fireproof layer.

[0012] Furthermore, the material of the thermal insulation and fireproof layer is epoxy resin fireproof coating.

[0013] Furthermore, the wall steel plate is made of stainless steel QN1803.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1) Improve the rigidity of the cavity steel module and control its deformation during transportation, hoisting and concrete pouring.

[0016] 2) The buckling resistance of the steel plate is improved and the restraining effect of the steel plate on the concrete is enhanced.

[0017] 3) It avoids complex structures, meets stiffness requirements, and improves strength.

[0018] 4) High strength, good ductility, corrosion resistance and fire resistance.

[0019] 5) The steel usage is economical, the layout is flexible, and it is easy to process and assemble. It has construction characteristics that are suitable for the modularization, standardization, factory production and information development of buildings.

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the cross-sectional arrangement of an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the shear wall system in the embodiment of the utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the longitudinal partition in the embodiment of the utility model;

[0024] Figure 4This is a schematic assembly diagram of an embodiment of the utility model;

[0025] Figure 5 It is a three-dimensional diagram of an embodiment of the utility model.

[0026] In the figure: 1-shear wall system, 2-steel-concrete composite column, 3-high-strength bolt, 4-concrete in the wall, 5-longitudinal partition, 6-insulation and fireproof layer, 7-stud, 8-wall steel plate, 9-connecting steel plate, 10-concrete in the column, 11-square steel pipe, 12-weight reduction hole. DETAILED DESCRIPTION

[0027] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description as follows.

[0028] like Figures 1 to 5 As shown, a new type of double steel plate concrete composite wall structure facing the bridge tower includes a shear wall system. Both ends of the shear wall system 1 are connected to steel-concrete composite columns 2 through high-strength bolts 3. The shear wall system includes two parallel wall steel plates 8. A plurality of longitudinal partitions 5 are arranged between the two wall steel plates along the length direction. The longitudinal partitions are vertically fixed to the two wall steel plates. The longitudinal partitions are welded to the inner surface of the wall steel plates. A plurality of circular weight-reducing holes 12 are opened on the longitudinal partitions. In-wall concrete 4 is poured between the two wall steel plates and the longitudinal partitions. The shear wall system 1 and the steel-concrete composite column 2 are connected and fixed by the high-strength bolts 3 to form an integral shear wall structure. The use of the steel-concrete composite structure in both the shear wall system 1 and the steel-concrete composite column 2 can give full play to the compressive performance of concrete while making full use of the good tensile performance of steel. The two coordinate with each other to improve the ultimate bearing capacity of the structure and enhance the fire resistance of the structure.

[0029] In the embodiment of the utility model, connecting steel plates are vertically arranged between the ends of the two wall steel plates, the connecting steel plates are provided with threaded holes for high-strength bolts to pass through and connect with the steel-concrete composite columns, the connecting steel plates are arranged parallel to the longitudinal partitions, and the connecting steel plates are perpendicular to the length direction of the shear wall system.

[0030] In the embodiment of the utility model, the cavity enclosed by the wall steel plate 8, the connecting steel plate 9 and the longitudinal diaphragm 5 improves the anti-buckling capacity of the steel plate and also enhances the restraining effect of the steel plate on the concrete. The longitudinal diaphragm is used as a stiffening rib to improve the rigidity of the cavity rigid module and control its deformation during transportation, hoisting and concrete pouring.

[0031] In the embodiment of the utility model, the design of the weight-reducing holes avoids complex structures such as longitudinal partitions, channel steels, angle steels, and perforated steel bars, meets the rigidity requirements, improves the strength, saves steel usage, and is also beneficial to the pouring of concrete.

[0032] In the embodiment of the utility model, studs 7 are arranged opposite to each other on the inner walls of the two wall steel plates, and the studs are all long studs with a length-to-diameter ratio of 8. The length-to-diameter ratio of 8 also improves the pull-out and shear strength of the studs.

[0033] In the embodiment of the utility model, the steel-concrete composite column is composed of a square steel tube 11 and a column inner concrete 11 poured in the square steel tube. The column inner concrete is poured in the square steel tube 11, which not only enhances the rigidity and earthquake resistance of the structural column as a whole, but also reduces the size of the structural column and saves space.

[0034] In the embodiment of the utility model, the concrete in the column and the concrete in the wall are both made of high-strength concrete with a cylindrical compressive strength greater than 90 MPa, which can not only improve the pull-out and shear resistance of the bolts, but also improve the strength of the structure.

[0035] In the embodiment of the utility model, the square steel pipe and the outer walls of the two wall steel plates are coated with a thermal insulation and fireproof layer 6.

[0036] In the embodiment of the utility model, the material of the thermal insulation and fireproof layer is epoxy resin fireproof coating. Epoxy resin has excellent fireproof performance and good thermal insulation effect, which further improves the fireproof performance of the combined shear wall and the combined column.

[0037] In the embodiment of the utility model, the material of the wall steel plate is stainless steel QN1803, which is not only more beautiful in shape, but also saves a lot of cost required for anti-corrosion. In addition, stainless steel has high strength, which can appropriately reduce the amount of steel used.

[0038] A working method of a new double steel plate concrete composite wall structure facing the bridge tower is carried out in the following steps:

[0039] S1: According to the construction requirements, the position of the square steel pipe is fixed, and then the column concrete is poured into the steel pipe. When the concrete in the column forms the required strength, an overall steel-concrete composite column system is formed;

[0040] S2: first install the longitudinal partition and the bolts into the two wall steel plates, and then fix the connecting steel plates to the two ends of the inner sides of the two wall steel plates to form an assembled shear wall system;

[0041] S3: Connect and fix the shear wall system to the steel-concrete composite column through high-strength bolts, and fix it between the two composite columns, so that the upper and lower ends of the shear wall system are flush with the upper and lower ends of the steel-concrete composite column respectively;

[0042] S4: pouring concrete into the shear wall cavity, and wait for the concrete in the wall to form the required strength to form an overall shear wall system;

[0043] S5: Spray thermal insulation materials on the outer surface of the shear wall system and the steel-concrete composite column to form a thermal insulation and fireproof layer. After the materials are stable, complete the construction of the new double steel plate composite wall facing the bridge tower.

[0044] Working principle of the embodiment of the utility model: in normal use, the two steel-concrete composite columns 2 in the structure and the shear wall system 1 between them play a role in resisting lateral standing. The wall steel plate 8 is mainly used as the bending member of the shear wall system 1, and the concrete 4 in the wall is mainly used as the compressive member of the shear wall system 2. Due to the isolation of the longitudinal diaphragm 5, the wall is divided into several cavities, which improves the anti-buckling ability of the wall steel plate 8 and also enhances the restraining effect of the wall steel plate 8 on the concrete 4 in the wall. The opening of the longitudinal diaphragm 5 can save steel, which is conducive to the pouring of concrete and also avoids complex structures. The bolt 7, as a connecting part between steel and concrete, provides the interface bearing capacity between steel and concrete and ensures the cooperative working performance of the two. The utility model uses a large amount of steel, and the overall seismic performance of the structure is significantly improved. When an earthquake occurs, the shear wall system 1 and the steel-concrete composite column 2 can provide good ductility for the structure and meet the displacement requirements of the structure under vibration; a large amount of stainless steel and thermal insulation materials are also used to improve the corrosion resistance and fire resistance of the bridge tower.

[0045] The utility model is not limited to the above-mentioned best implementation mode. Anyone can derive other various forms of new double steel plate concrete composite wall structures facing the bridge tower under the inspiration of the utility model. All equivalent changes and modifications made according to the scope of the patent application of the utility model shall fall within the scope of the utility model.

Claims

1. A new double steel plate concrete composite wall structure facing the bridge tower, characterized by: It comprises a shear wall system, both ends of which are connected with steel-concrete composite columns via high-strength bolts. The shear wall system comprises two parallel wall steel plates, a plurality of longitudinal partitions are arranged between the two wall steel plates along their length directions, the longitudinal partitions are vertically fixed to the two wall steel plates, a plurality of circular weight-reducing holes are opened on the longitudinal partitions, bolts are arranged on the inner walls of the two wall steel plates opposite to each other, and inner wall concrete is poured between the two wall steel plates and the longitudinal partitions.

2. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 1 is characterized in that: Connecting steel plates are vertically arranged between the ends of the two wall steel plates, and threaded holes are provided on the connecting steel plates for high-strength bolts to pass through and connect with the steel-concrete composite columns.

3. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 1 is characterized in that: The studs are all long studs with a length-to-diameter ratio of 8.

4. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 1 is characterized in that: The steel-concrete composite column consists of a square steel pipe and column concrete poured in the square steel pipe.

5. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 4 is characterized in that: The concrete inside the column and the concrete inside the wall are both made of high-strength concrete with a cylindrical compressive strength greater than 90 MPa.

6. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 4 is characterized in that: The square steel pipe and the outer walls of the two wall steel plates are coated with a thermal insulation and fireproof layer.

7. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 6 is characterized by: The material of the thermal insulation and fireproof layer is epoxy resin fireproof coating.

8. The novel double steel plate concrete composite wall structure facing the bridge tower according to claim 1 is characterized by: The material of the wall steel plate is stainless steel QN1803.

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