CN201343796Y - Steel pipe concrete-steel support-steel plate enclosed concrete shear wall - Google Patents

Abstract

Steel tube concrete-steel brace-steel plate outsourcing concrete shear wall belongs to a kind of shear wall. It is composed of steel pipe concrete frame columns (1) and concrete shear wall panels embedded with steel plates (2), and is characterized in that steel pipe concrete frame columns (1) are arranged at both ends of the shear wall, and steel beams are arranged on the frame beams (4), and at the same time, a steel brace (3) is arranged on the steel plate (2) embedded in the shear wall. Compared with the existing shear wall, the shear wall of the utility model has higher initial rigidity, higher bearing capacity, slower bearing capacity and stiffness attenuation, better overall anti-seismic energy consumption performance, relatively stable anti-seismic performance in the later stage, and reduced shear slip damage at the bottom.

Description

Steel tube concrete-steel brace-steel plate outsourcing concrete shear wall

technical field

The utility model relates to a steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall, which belongs to the field of structure anti-seismic design.

Background technique

my country is an earthquake-prone country. Strong earthquakes such as Haicheng and Tangshan have caused huge losses to people's lives and properties. For earthquake disasters, the most fundamental measure is to do a good job in anti-seismic fortifications and improve the anti-seismic ability of engineering structures. How to enhance the seismic capacity of structures through reasonable seismic design is of great concern to engineering circles at home and abroad. One of the key components in the seismic design of structures is the shear wall, which is a major lateral force-resisting system in high-rise buildings. It has high anti-sway stiffness and high bearing capacity, but has poor ductility and is prone to brittle failure, which is very unfavorable to the seismic performance of the overall structure.

In recent years, the steel-concrete composite shear wall structure has been widely used in engineering and has been well received by the engineering community. The steel-concrete composite shear wall combines reinforced concrete structure and steel structure, which can make up for their respective shortcomings and give full play to their advantages, so that the structure has greater bearing capacity and rigidity, and has better ductility and energy dissipation capacity . Among them, the CFST frame shear wall is a kind of steel-concrete composite shear wall, which has been applied in many high-rise buildings. "Technical Regulations for Rectangular Steel Tube Concrete Structures" also proposed a calculation method for this shear wall. The frame of the concrete-filled steel tube of the shear wall strengthens the restraint of the concrete wall panel, and the concrete-filled steel tube column has a better later bearing capacity. However, the reinforced concrete wall panels in this kind of shear wall have poor ductility as the first line of defense, which affects the lateral force resistance of the entire shear wall and even the entire structure, that is, the earthquake resistance.

The steel plate shear wall consumes seismic energy through the thin film tension band of the inner filling steel plate, so ensuring the full development of the tension band is an important condition for exerting the superiority of the steel plate shear wall. The important prerequisite for fully developing the tension belt is to ensure that the frame is not unstable.

Utility model content

The technical problem to be solved by the utility model is to significantly improve the ductility and seismic energy consumption capacity of the concrete-filled steel tube frame shear wall, and a concrete-steel tube-steel brace-steel plate outsourcing concrete shear wall is designed.

The technical scheme adopted by the utility model is: it is composed of a frame and a steel plate concrete shear wall panel, and a reinforcement mesh composed of transverse steel bars and longitudinal steel bars is arranged on both sides of the steel plate of the steel plate concrete shear wall panel. Tension connection of steel bars, characterized in that: the frame includes a frame beam and a steel pipe concrete frame column, the steel pipe concrete frame column is arranged at both ends of the shear wall, a steel beam is arranged in the frame beam, and the steel plate embedded in the shear wall Steel braces are arranged on the top, and the two ends of the steel braces are connected with the frame beams of medium-sized steel beams and steel tube concrete frame columns; And the eccentric support steel truss of strong column, strong brace and weak energy dissipation beam section is formed inside the steel plate concrete shear wall.

The described steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall is characterized in that: the steel brace set on the shear wall steel plate is in the shape of a herringbone, and the upper end of the steel brace extends into the upper frame beam, which is consistent with the shape of the frame beam. Steel beam connection, the lower end of the steel brace extends into the joint between the lower frame beam and the concrete-filled steel tube frame column, and connects with the steel-filled steel tube frame column and the steel beam in the lower frame beam at the same time, and forms a strong column inside the steel plate concrete shear wall. Steel trusses with strong bracing and weak energy dissipation beam sections.

The described steel tube concrete-steel brace-steel plate outsourcing concrete shear wall is characterized in that: the steel brace set on the shear wall steel plate is X-shaped, and the upper end of the steel brace extends into the joint of the upper frame beam and the steel tube concrete frame column In the middle, it is connected with the concrete-filled steel tube frame column and the shaped steel beam in the upper frame beam at the same time. The beams are connected at the same time, and a steel truss of strong columns, strong braces, and weak energy dissipation beam sections is formed inside the shear wall.

The described steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall is characterized in that: the steel brace set on the shear wall steel plate is in the shape of a figure-eight, and the steel brace extends into the upper frame beam, and is connected with the shape of the upper frame beam. Steel beam connection, the lower end of the steel brace extends into the joint between the lower frame beam and the concrete-filled steel tube frame column, and connects with the steel-filled steel tube frame column and the steel beam in the lower frame beam at the same time, and forms strong columns and strong braces inside the shear wall , Weak energy dissipation beam section steel truss.

The utility model combines the advantages of the steel pipe concrete frame shear wall and the steel plate shear wall, and at the same time steel braces are arranged on the steel plate, and finally the wall plate is outsourced with concrete. The seismic capacity of the combined structure is significantly higher than the sum of the CFST frame shear wall and the steel plate shear wall working independently. The existence of steel braces and concrete solves the problem of out-of-plane instability of the steel plate, and is conducive to improving the shear bearing capacity, ductility and energy dissipation capacity of the steel plate shear wall panel as the first line of defense against earthquakes. When the wall panel is damaged in the earthquake, the truss structure formed by the steel brace, the upper and lower frame beams, and the steel tube concrete frame column is a geometrically invariant system, thereby maintaining the overall stability of the structure. Compared with ordinary concrete-filled steel tube frame shear walls, the bearing capacity is improved, the attenuation of bearing capacity and stiffness is slower, the later seismic performance is relatively stable, and the bottom shear slip damage is reduced.

Since the shear wall is the core anti-lateral force component of the building structure, the seismic capacity of the shear wall is improved, and the overall seismic capacity of the structure is also improved. When the building encounters a strong earthquake, its earthquake damage can be reduced and its collapse can be prevented. .

Description of drawings

Fig. 1 is a schematic diagram of structural reinforcement of a structural unit of the shear wall when the steel brace is herringbone in the utility model steel tube concrete-steel brace-steel plate outsourcing concrete shear wall;

Fig. 2 is the enlarged schematic view of A-A section in Fig. 1;

Fig. 3 is the enlarged schematic view of B-B section in Fig. 1;

Fig. 4 is a schematic diagram of structural reinforcement of a structural unit of the shear wall when the steel brace is in an X shape in the steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall of the present invention;

Fig. 5 is a schematic diagram of the structural reinforcement of a structural unit of the shear wall when the steel brace is in a figure-eight shape in the steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall of the present invention;

Fig. 6 is a schematic diagram of the structural reinforcement of a structural unit of the shear wall when the steel support is arranged in a herringbone network in the steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall of the present invention;

Fig. 7 is a schematic diagram of the structural reinforcement of a structural unit of the shear wall when the steel support is arranged in an X-shaped network in the steel pipe concrete-steel brace-steel plate outsourcing concrete shear wall of the utility model;

Fig. 8 is a schematic diagram of the structural reinforcement of a structural unit of the shear wall when the steel supports are arranged in a figure-eight network in the utility model concrete-filled steel tube-steel brace-steel plate-wrapped concrete shear wall.

In the figure, 1-concrete steel pipe frame column, 2-steel plate, 3-steel brace, 4-shaped steel beam, 5-transverse reinforcement, 6-longitudinal reinforcement, 7-longitudinal reinforcement, 8-tie reinforcement.

Detailed ways

Example 1

Schematic diagrams of the structural reinforcement of a structural unit of concrete filled steel tube-steel braces-steel plate-wrapped concrete shear walls are shown in Figure 1, Figure 2 and Figure 3.

The production method is as follows:

1) Fabricate steel pipe concrete frame column 1, install partitions inside steel pipes at beam-column joints, weld short steel beams outside the columns, and pre-weld vertical plates on steel pipe walls to prepare for anchoring steel plates 2 embedded in wall panels, and reserve The hole is used for anchoring the transverse reinforcement 5;

2) Make the profiled steel beam 4 in the frame beam, the edge of the profiled steel beam 4 is welded to the flange of the preset short steel beam at the column edge, and the web of the steel beam and the web of the short steel beam are rubbed with double splint high-strength bolts type connection;

3) Making the steel plate 2 embedded in the wall panel, the steel plate 2 is welded or bolted to the steel pipe concrete frame column 1 and the steel beam 4;

4) A steel brace 3 is arranged on the steel plate 2, the upper end of the steel brace 3 is welded or bolted to the shaped steel beam 4 in the upper frame beam, and the lower end is welded or bolted to the steel pipe concrete frame column 1 and the shaped steel beam 4 respectively;

5) Configure the transverse steel bar 5 and the longitudinal steel bar 6 of the shear wall, and the transverse steel bar 5 extends into the reserved hole of the steel pipe concrete frame column 1;

6) Leave a certain protective layer thickness on the outside of the shear wall panel and frame beam, and support the formwork;

7) Pouring the concrete in the steel pipe, the concrete of the wall plate and the frame beam, and after forming, it is a steel pipe concrete-steel brace-steel plate-wrapped concrete shear wall.

As shown in Fig. 1-3, the concrete-filled steel tube-steel brace-steel plate-wrapped concrete shear wall designed according to the above method has no reinforcement in the steel tube concrete frame column 1; the frame beam of the shear wall is a steel beam 4, and the outer The longitudinal reinforcement 7 is arranged; the steel brace 3 arranged on the steel plate 2 of the shear wall is in the shape of a herringbone. Among them, the steel brace 3 is connected with the middle steel beam 4 of the frame beam, and the lower end of the steel brace 3 is connected with the steel tube concrete frame 1 and the steel beam 4 at the same time. The reinforcement of the shear wall panel is: on both sides of the wall panel, the transverse reinforcement 5 and the longitudinal reinforcement 6 are uniformly arranged on both sides of the shear wall along the horizontal and vertical directions respectively, and are bound and fixed at the intersection points to form two pieces of steel mesh, and the horizontal reinforcement 5 Inserted into the concrete-filled steel pipe column 1 (perforated on the side wall of the column) for anchorage; finally, the concrete-filled steel pipe frame column 1, frame beams and concrete shear wall panels are poured and rammed into concrete at one time to form a concrete-filled steel pipe-steel brace-steel plate outsourcing concrete shear wall.

Example 2

The second structural form of concrete-filled steel tube-steel brace-steel plate-wrapped concrete shear wall is shown in Figure 4. X-shaped steel brace 3 is set on steel plate 2, and its upper end is connected with steel tube concrete frame column 1 and upper steel beam 4. Connect simultaneously. The lower end is connected with the steel pipe concrete frame column 1 and the lower shaped steel beam 4 at the same time. Other aspects are the same as the first form.

Example 3

The third structural form of steel tube concrete-steel brace-steel plate outsourcing concrete shear wall is shown in Figure 5, which is to set a figure-eight steel brace 3 on the steel plate 2, and its upper end is connected with the upper steel beam 4. The lower end is connected with the steel pipe concrete frame column 1 and the lower shaped steel beam 4 at the same time. Other aspects are the same as the first form.

Embodiment 4, 5, 6

When the height-to-width ratio of the shear wall is less than 1, it is better to adopt multiple composite concealed support network layout. The fourth, fifth and sixth structural forms of CFST-steel braces-steel plate outsourcing concrete shear walls are shown in Figure 6, Figure 7, and Figure 8 respectively. One of the above-mentioned three ways can be selected as the way of the steel brace, and the other structures are the same as the first way.

Claims (4)

1. Concrete-filled steel tube-steel brace-steel plate outsourcing concrete shear wall is composed of frame and steel plate concrete shear wall panel, and horizontal steel bars (5) and longitudinal steel bars are arranged on both sides of the steel plate (2) of the steel plate concrete shear wall panel (6) The reinforced mesh that forms, pulls and connects with tensioned reinforcing bar (8) between the reinforced mesh, it is characterized in that: described frame comprises frame beam and steel tube concrete frame column (1), and steel tube concrete frame column (1) is set At both ends of the shear wall, a steel beam (4) is set in the frame beam, and a steel brace (3) is arranged on the steel plate (2) embedded in the shear wall. (4) Connected with the concrete-filled steel tube frame column (1); the wall panel is wrapped with concrete; the steel beam (4), the steel tube concrete frame column (1) and the steel brace (3) form a shear wall hidden eccentrically supported steel truss, And the eccentric support steel truss of strong column, strong brace and weak energy dissipation beam section is formed inside the steel plate concrete shear wall. 2. The steel tube concrete-steel brace-steel plate outsourcing concrete shear wall according to claim 1, characterized in that: the steel brace (3) arranged on the shear wall steel plate (2) is in a herringbone shape, and the steel brace (3 ) extends into the upper frame beam and connects with the steel beam (4) in the frame beam, and the lower end of the steel brace (3) extends into the joint between the lower frame beam and the CFST frame column (1), and connects with the CFST frame column (1) and the shaped steel beam (4) in the lower frame beam are connected at the same time, and a steel truss of strong column, strong brace and weak energy dissipation beam section is formed inside the steel plate concrete shear wall. 3. The steel tube concrete-steel brace-steel plate outsourcing concrete shear wall according to claim 1 or 2, characterized in that: the steel brace (3) set on the shear wall steel plate (2) is X-shaped, and the steel brace The upper end of (3) extends into the node of the upper frame beam and the concrete-filled steel tube frame column (1), and is connected with the steel tube concrete frame column (1) and the steel beam (4) in the upper frame beam at the same time, and the steel brace (3) The lower end of the frame extends into the joint between the lower frame beam and the concrete-filled steel tube frame column (1), connects with the steel tube concrete frame column (1) and the steel beam (4) in the lower frame beam at the same time, and forms a strong wall inside the shear wall. Steel trusses with columns, strong braces, and weakly dissipated beams. 4. The concrete-filled steel tube-steel brace-steel plate-wrapped concrete shear wall according to claim 1 or 2, characterized in that: the steel brace (3) set on the shear wall steel plate (2) is in a figure-eight shape, and the steel brace (3) The upper end extends into the upper frame beam and connects with the shaped steel beam (4) in the upper frame beam, and the lower end of the steel brace (3) extends into the joint between the lower frame beam and the steel pipe concrete frame column (1), and connects with the steel pipe The concrete frame column (1) and the shaped steel beam (4) in the lower frame beam are connected at the same time, and a steel truss of strong column, strong brace and weak energy dissipation beam section is formed inside the shear wall.

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