CN203080799U - Coupling beam combining steel plates and high-strength concrete - Google Patents

Abstract

The utility model provides a steel plate high-strength concrete composite connecting beam: the composite connecting beam includes outsourcing steel plates and high-strength concrete poured between the outsourcing steel plates. The steel plate replaces the shear steel bar and the concrete resists the shear force together, which improves the shear bearing capacity of the coupling beam. At the same time, through the effective restraint of the high-strength concrete by the outsourcing steel plate, the brittleness of the high-strength concrete can be improved, and the bearing capacity and deformation capacity of the coupling beam can be improved, which is conducive to the reduction of the joint shear wall structure system while meeting the requirements of seismic performance. The section of the connecting beam; in addition, the outsourcing steel plate is used as the formwork, which makes the construction more convenient and fast.

Description

Steel Plate High Strength Concrete Composite Coupling Beam

technical field

The utility model belongs to the technical field of steel and concrete composite structures and mixed structures, and relates to a shear wall connecting beam, in particular to a steel plate high-strength concrete composite connecting beam.

Background technique

Coupling beams refer to the beams connecting wall piers and wall piers in the shear wall structure system, and they are important seismic energy-dissipating components in high-rise buildings. Under the horizontal earthquake, the coupling beam can adjust the lateral stiffness and bearing capacity of the shear wall and ensure the ductility of the shear wall through its own yield, so as to achieve the purpose of consuming the seismic capacity. The strength, stiffness and deformation capacity of the connecting beam have a significant impact on the seismic performance of the structure.

The failure of coupling beams in shear walls of high-rise buildings under horizontal load can be divided into brittle failure and ductile failure. Coupling beams lose their bearing capacity when brittle failure occurs. When shear failure occurs to all coupling beams along the full height of the wall, each wall pier loses the restraining effect of the coupling beams on it and will become a single independent wall. This will greatly reduce the lateral stiffness of the structure, increase the deformation, increase the bending moment of the wall piers, and may eventually lead to the collapse of the structure. Intersecting cracks will appear in the coupling beams under the action of earthquakes, and plastic hinges will be formed at the ends of the beams. The structural stiffness will decrease and the deformation will increase, thereby absorbing a large amount of seismic energy. At the same time, the bending moment and shear force can still be transmitted through the plastic hinges. The limbs play a certain restraint role, so that the shear wall maintains sufficient rigidity and strength. In this process, the coupling beam plays a role of energy consumption, which plays an important role in reducing the internal force of the wall and delaying the yield of the wall. However, under the repeated action of earthquakes, the cracks of the coupling beam will continue to develop and widen until the concrete is damaged under compression.

Therefore, the design of the coupling beam needs to take certain improvement measures to ensure that the coupling beam has a certain rigidity so as to effectively combine the wall piers it connects, enhance the integrity of the shear wall system, and at the same time require that the coupling beam does not undergo shear failure , which means that the design of the wall piers and coupling beams is required to conform to the principle of strong shear weak bending, and the yield of the coupling beams is earlier than that of the wall piers, and the coupling beams are required to have good ductility and energy dissipation capacity.

Utility model content

The purpose of this utility model is to provide a steel plate high-strength concrete composite coupling beam, which can well overcome the defects of existing coupling beams, can meet the requirements of bearing capacity and deformation capacity, and has the advantages of simple structure, convenient construction, The advantages of reliable connection.

In order to achieve the above object, the utility model adopts the following technical solutions:

The composite connecting beam includes outsourcing steel plates and high-strength concrete poured between the outsourcing steel plates.

Several rows of pegs are arranged on the surface of the opposite side of the outer cladding steel plate.

The outsourcing steel plate is a coupling beam outsourcing formwork surrounded by oppositely arranged outsourcing steel plate units, and high-strength concrete is wrapped in the coupling beam outsourcing formwork.

The coupling beam outsourcing formwork is composed of four outsourcing steel plate units.

The steel content ratio of the composite connecting beam is 0.04-0.2.

The beneficial effects of the utility model are:

The steel plate high-strength concrete composite coupling beam described in the utility model is equipped with steel plates on the outside of the concrete coupling beam to replace the shear reinforcement and concrete to jointly resist shear force, thereby improving the bearing capacity and deformation capacity of the coupling beam, and avoiding the exposure of concrete cracks, which can expand the normal structure. The working range of the used state improves the performance and durability of the coupling beam. In addition, the outsourcing steel plate is used as the formwork, which makes the construction more convenient and fast; the steel plate high-strength concrete composite connecting beam described in the utility model is equipped with bolts between the steel plates, so that this new type of composite connecting beam can ensure better coupling between the steel plate and the concrete, and synergistic Work to prevent the brittle failure of the coupling beam, so as to achieve the purpose of improving the ductility and seismic energy dissipation performance of the coupling beam.

The steel plate high-strength concrete composite connecting beam of the utility model enables high-strength concrete to be popularized and applied in high-rise and super high-rise buildings and buildings in areas with high seismic intensity, especially high-rise and super high-rise buildings in areas with seismic fortification intensity above 8 degrees.

Description of drawings

Fig. 1 is one of structural schematic diagrams of steel plate high-strength concrete composite coupling beam described in the utility model;

Fig. 2 is the second structural diagram of the steel plate high-strength concrete composite coupling beam described in the utility model;

In the figure: 1 indicates the outsourcing steel plate unit, 2 indicates high-strength concrete, and 3 indicates studs.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Referring to Fig. 1-Fig. 2, the composite coupling beam described in the utility model includes outsourcing steel plates and high-strength concrete 2 poured between the outsourcing steel plates; several rows of studs 3 are arranged on the opposite side surface of the outsourcing steel plates, through Studs are set between the steel plates to enhance the interaction between the concrete and the steel plates; the outsourcing steel plate is a connecting beam outsourcing formwork enclosed by the opposite outsourcing steel plate unit 1 (thin steel plate), and the high-strength concrete 2 is wrapped in In the outsourcing formwork of the coupling beam; the outsourcing formwork of the coupling beam is composed of four outsourcing steel plate units 1; the steel content rate of the combined coupling beam is 0.04-0.2.

Example

A new type of steel-concrete composite coupling beam with steel plates on both sides, that is, an outsourcing steel plate-concrete composite coupling beam. The concrete coupling beam is poured inside the outsourcing steel plate, and the concrete and steel plates are connected through bolts to strengthen the connection. The studs are welded on the inner side of the double-layer steel plate, perpendicular to the steel plate, and arranged in several rows evenly along the height direction of the steel plate. The outsourcing steel plate is surrounded by four steel plates on four sides to form an outsourcing formwork, and concrete is wrapped in the outsourcing formwork. Concrete adopts high-strength concrete (above C6).

This new composite coupling beam provides flexural strength and shear strength by disposing steel plates on the outside of the coupling beam instead of close-fitting longitudinal and transverse reinforcements, which is conducive to exerting the ductility of the structure and avoiding brittle failure. The amount of steel ratio determines the failure mode of the component to a certain extent, so the steel ratio of the connecting beam section can not be too low or too high. ) stipulates that the steel content ratio α is in the range of 0.04-0.2.

The steel plate of the outsourcing steel plate-concrete composite coupling beam is welded by the steel plate of the corresponding specification according to the needs, and it is produced in a professional steel structure company in advance, and then transported to the construction site. After welding with the shear wall at the designated position, the outsourcing steel plate It can be used as a template for concrete pouring in the construction stage, thereby saving the production of templates, saving a lot of consumables and making the construction simple and convenient, which can speed up the construction progress, improve the construction efficiency, and create more and better social and economic benefits.

Claims (5)

1. A steel plate high-strength concrete composite connecting beam, characterized in that: the composite connecting beam includes outsourcing steel plates and high-strength concrete (2) poured between the outsourcing steel plates. 2 . The steel plate high-strength concrete composite connecting beam according to claim 1 , characterized in that: several rows of studs ( 3 ) are arranged on the opposite surface of the outsourcing steel plate. 3 . 3. A steel plate high-strength concrete composite connecting beam according to claim 1, characterized in that: the outsourcing steel plate is a connecting beam outsourcing formwork enclosed by relatively set outsourcing steel plate units (1), and the high-strength concrete ( 2) Wrapped in the outer formwork of the coupling beam. 4. A steel plate high-strength concrete composite coupling beam according to claim 3, characterized in that: said coupling beam outsourcing formwork is composed of four outsourcing steel plate units (1). 5. A steel plate high-strength concrete composite connecting beam according to claim 1, characterized in that: the steel content of the composite connecting beam is 0.04-0.2.

Images