Random Seismic Response Analysis of Super High-Rise Structure Based on Target Response Spectrum

At present,due to the lack of long-period ground motion records,the research results on seismic response characteristics of high-rise structures under random seismic input get quite few.The Shanghai earthquake design response spectrum and the fitting long-period response spectrum of soft soil site were chosen as target response spectrum,and the iterating method was used to compute the relative power spectral density functions.Then,the Clough-Penzien model was selected to fit the power spectral density functions,and corresponding spectral parameters were given.Based on this,the Ansys software was used to establish the three-dimensional finite element model of a super high-rise building located in Shanghai,and the random seismic response of the super high-rise structure was analyzed.the random seismic response characteristic of the super high-rise structure under different power spectral density and the response variation of floor power spectral density were discussed,and some valuable conclusions for engineering were acquired.