Study On Seismic Performance Of Small-Span-to-Depth-Ratio Coupled Shear Walls With Steel Reinforced Concrete Coupling Beams

In recent years,with the continuous advancement of urbanization in China,the form of high-rise building structure in China is constantly changing.The connecting limb shear wall is widely used in the high-rise building structure,because it has advantages of frame structure and shear wall structure.But because of its special structural form,especially the continuous beam span high comparison hour being smaller,the continuous beam of the shear wall is prone to shear brittle failure.So it is important that the force characteristics of the shear wall of the connecting limb.It has a great practical significance to find a new method to avoid shear failure of continuous beam,and to ensure the overall seismic performance of the shear wall of the connecting limb.The main work and conclusions of this paper are as follows:(1)This paper analyzes the deformation and force characteristics of the connecting beam and the wall limb of the coupling limb shear wall,and determines the main factors affecting its failure characteristics,such as the cross-Gaby of the continuous beam,the size of the section,the concrete strength and the axial pressure ratio.(2)The nonlinear numerical model of the joint limb shear wall of small span high specific steel concrete girder is constructed,and its correctness is demonstrated by combining the relevant test results.(3)The plastic damage failure mode of the shear wall of a small span high specific steel concrete continuous beam is expounded by comparing the shear wall of the common concrete continuous girder.(4)The nonlinear parametric analysis of the common continuous girder combined limb shear wall and the steel concrete continuous beam combined limb shear wall under the condition of different span Gaby,different steel size,different concrete strength and different axial pressure ratio is carried out,and the seismic performance of the combined limb shear wall is compared from three aspects of bearing capacity,ductility and energy dissipation capacity.It is determined that the shear wall of steel concrete continuous girder has better seismic performance under the condition of small span and high ratio.