A gradient mechanism shear wall structure and its construction method

Abstract

The invention belongs to the field of fixed buildings, and relates to a gradient mechanism shear wall structure and a construction method thereof. In this gradient mechanism shear wall structure, a low-strength concrete area and a rocking support are set between the reinforced concrete shear wall and the foundation. The upper support and the lower support are composed of protruding teeth on the lower end of the upper support, and grooves on the upper end of the lower support. The grooves and the protruding teeth cooperate with each other to ensure that the upper support can rotate around the side edge of the lower support. At the same time, the rocking support has the ability to resist compression and shear. The low-strength concrete area and the swing support in the wall of the present invention can make it have the dual functions of the traditional shear wall and the swing wall, and the transformation of the wall function mechanism is realized through the gradual withdrawal of the low-strength concrete area. The invention can effectively avoid the brittle shear failure and instability failure that are prone to occur in the traditional shear wall structure under the action of earthquake, and make the damage mechanism of the structure more clear and controllable.

Description

technical field [0001] The invention belongs to the field of fixed buildings, and relates to a gradient mechanism shear wall structure and a construction method thereof. Background technique [0002] Reinforced concrete shear walls have high lateral stiffness and can bear most of the horizontal earthquake action. They are the core anti-seismic components of building structures, especially high-rise building structures. The earthquake hazards of traditional shear walls are mainly manifested as follows: poor ductility, low shear walls are mainly shear deformation, and brittle shear failure often occurs; thin and high shear walls are mainly bending deformation, and the bottom of the wall is under compression The buckling of longitudinal reinforcement in the zone, concrete breakage and out-of-plane deformation often lead to its instability failure. The above-mentioned earthquake disasters will cause a sudden drop in the bearing capacity and stiffness of the wall, resulting in a...

AI Technical Summary

Problems solved by technology

The earthquake hazards of traditional shear walls are mainly manifested as follows: poor ductility, low shear walls are mainly shear deformation, and brittle shear failure often occurs; thin and high shear walls are mainly bending deformation, and the bottom of the wall is under compression The buckling of longitudinal steel bars in the zone, concrete breakage and out-of-plane deformation often lead to its instability failure

The above-mentioned earthquake disasters will cause a sudden drop in the bearing capacity and stiffness of the wall, resulting in a weak layer in the building structure that is difficult to repair after the earthquake

[0003] At present, measures to improve the seismic performance of shear walls are to strengthen the wall itself, such as using high-performance concrete, high-strength steel bars, setting end columns, and changing the form of reinforcement, etc., but this method does not essentially change the shear force. Damage and Deformation Mechanisms of Walls

On the other hand, the rocking wall is formed by loosening the constraints between the wall and the foundation. The rocking of the wall can effectively avoid the occurrence of the interlayer failure mode of the main structure, improve the integrity of the structure, and make the damage evenly distributed under the action of strong earthquakes. In each layer, the uncontrollable local failure mode becomes a more predictable overall failure mode; however, due to the addition of the hinge mechanism, the lateral stiffness of the wall will be greatly reduced, and the structure cannot be damaged under normal use and small earthquakes. provide sufficient lateral stiffness

[0004] Both of the above two methods have a certain degree of deficiency, and it is difficult to meet the differentiated functional requirements of the structure under different earthquake intensities. Therefore, it is necessary to develop a new type of seismic wall with multiple functions.

Images