In order to study the seismic capability of super high-rise structures under near fault and far field earthquakes with uncertainty and correlation,a multivariate joint fragility analysis method is proposed.A fishbone model of a super high-rise structure was established and verified,and two optimal intensity measures with the largest correlation were selected to conduct multivariate probabilistic seismic demand analysis,and the log-linear relationship between intensity measures and engineering demand parameters was established.Based on Akaike information criterion(AIC)and Bayesian Information Criterion(BIC),the optimal Copula function was identified.The multivariate joint seismic fragility surface of the structure was generated via the optimal Copula function and Monte Carlo simulation method,and the seismic capacity of the super high-rise structure under the near fault and far field earthquakes considering uncertainty and correlation was quantified.The conclusions show near fault ground motions have a great destructive ability to super high-rise structures,and the impact of near fault ground motions cannot be ignored in the future seismic design and evaluation of super high-rise buildings.
关键词
超高层结构/近远场地震/Copula函数/多元联合易损性
Key words
super high-rise structure/near fault and far field earthquakes/copula function/multivariate joint fragility
维普
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