Seismic Performance Analysis Of Super High-rise Building Structure Based On Performance

With the rapid development of China's economy,the demand for high-rise buildings is increasing.How to evaluate the seismic performance of out of gauge high-rise building under earthquake is the research focus of the industry experts and scholars.In this paper,the performance-based seismic design method is introduced.Combining with the current code for seismic design of buildings and the technical specification for high building concrete structure,the research theory and method are expounded.Based on the design concept of "three level,two stage",the performance target is drawn up.Then,using PKPM and ETABS design software,the elastic and elastoplastic analysis of the structure at all levels are carried out.The seismic performance of the structure under the action of simulating the earthquake at all levels is obtained,and the weak parts and displacement of the structure are found.Based on the calculation results,the results of different soft parts calculation and the calculation methods are compared.Good and bad.Because fiber concrete has excellent mechanical properties,it can enhance the seismic performance of a structure to a certain extent,and facilitate construction.In this paper,PVA fiber material is introduced and the seismic performance of the structure system based on UHTCC is simulated by OpenSees software.The size and distribution of the maximum interlayer displacement and the maximum interlayer displacement angle under the earthquake action are obtained,which provides reference for the study of the aseismic performance of UHTCC.The research results of the paper show that:Firstly,using the performance-based seismic design method,through the software simulation,it can analyze the performance of the structure under the earthquake,the fortified earthquake and the rare earthquake,and verify that it meets the standard seismic demand.After that,the static elastoplastic analysis and dynamic elastoplastic time history analysis of the structure are carried out by EPDA&PUSH,and the calculation efficiency of the two analytical methods is compared.It is concluded that the dynamic elastoplastic time history analysis is long,but the result is accurate and detailed;the static elastoplastic analysis is less used,the result is concise,and has certain reference value.Finally,the UHTCC is introduced in this paper to simulate the seismic performance of the super high rise building structure based on UHTCC.The results show that the maximum interlayer displacement and the maximum interlayer displacement angle of the simulated UHTCC structure under the earthquake action are less than the simulated values based on the ordinary concrete,and the weak parts are relatively concentrated.It provides a new direction.According to the current structural design specification,combined with theoreticalanalysis and simulation,the rationalization suggestions are put forward,which will provide a basis and reference for future research.