Gradient mechanism shear wall structure and construction method thereof

Abstract

The invention belongs to the field of fixed buildings, and relates to a gradient mechanism shear wall structure and a construction method thereof. According to the gradient mechanism shear wall structure, low-strength concrete areas and a swing support are arranged between reinforced concrete shear walls and a foundation, and buckling restrained steel bars are buried in the low-strength concrete areas to replace wall embedded column longitudinal bars; and the swing support is composed of an upper support and a lower support, convex teeth are arranged on the lower end face of the upper support,grooves are formed in the upper end face of the lower support, the grooves are matched with the convex teeth to ensure that the upper support can rotate around the side edge of the lower support, andmeanwhile, the swing support has compression resistance and shear resistance. According to the gradient mechanism shear wall structure and the construction method thereof, by means of the low-strength concrete areas and the swing support at the bottom of wall bodies, the gradient mechanism shear wall structure has the dual functions of a traditional shear wall and a swing wall, and transformationof the wall body function mechanism is achieved through gradual quit work of the low-strength concrete areas; and according to the gradient mechanism shear wall structure and the construction methodthereof, brittle shear failure and instability failure of a traditional shear wall structure under the action of an earthquake can be effectively avoided, and the damage mechanism of the structure ismore definite 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.

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