Multi Modal Pushover Analysis Of Shear Wallstructure Under Multi Stage Seismic Action

Multimode Pushover analysis method referenced in this article could consider on the influence of the higher modes and the change of mode in elastic-plastic phases.However,the previous multimodal pushover analysis is mainly used for frame structure which's deformation is shear type,shear wall structure which's deformation is bend type,couldn't ignore the influence of the higher modes,so multimodal Pushover analysis method were used.The structure of this paper selected a Huarun center housing,according to the?Map of Chinese Ground Motion?which is implemented in the June 1,2016,using the traditional Pushover method,multi modal pushover analysis method and time history analysis method to seismic analysis on,providing reference for practical engineering application in the future.The contents of this paper are as follows:(1)The development of the shear wall structure at home and abroad,the development of structural seismic theory,as well as the research status of Pushover method and multimodal static elastic-plastic analysis are introduced.(2)Taking Huarun residential center in a city as the research object,this paper uses the SATWE in PKPM structure design software to study the period ratio of the structure,the shear weight ratio,the displacement ratio,the story drift angle,the stiffness ratio,the stiffness to weight ratio,the axial compression ratio.(3)The principle and steps of the Pushover analysis,the conversion of the single degree of freedom system,the method of the double broken line,and so on,which affect the Pushover analysis.(4)Elaborating the principle of multimodal Pushover analysis method,studying the MPA? the modified MPA method(i.e.MMPA)and improved MPA method(i.e.IMPA)three multimodal analysis methods,and combining the elastic-plastic response spectrum to discusses the method of solving target displacement.(5)Under the action of four earthquake,as the standard of the dynamic analysis results,using MPA?MMPA and IMPA method analysis the seism performance,the results show that the MMPA method is more suitable for the analysis of shear wall structure.The floor displacement,story drift and the plastic hinge of the evolution is studied,which provide some reference for the engineering of MPA multimodal analysis in future.