基于FORM有限元可靠度方法的结构整体概率抗震能力分析

GLOBAL PROBABILISTIC SEISMIC CAPACITY ANALYSIS OF STRUCTURES BASED ON FORM FINITE ELEMENT RELIABILITY METHOD

将多级力控制Pushover分析方法与一次可靠度方法(First Order Reliability Method,FORM)相结合,提出了结构整体概率抗震能力分析的FORM有限元可靠度方法。利用OpenSees的有限元可靠度分析模块,将该方法应用于钢筋混凝土框架结构,并与蒙特卡洛模拟法分析结果进行对比。结果表明:该方法具有较高的精度和效率,为结构整体概率抗震能力分析提供了另外一种思路。

A new approach for the global seismic capacity analysis of structures by combining multi-level force controlled Pushover analysis with the first order reliability method（FORM） together is proposed.The new approach is applied to R.C.frame structures by employing the finite element reliability module consisted in OpenSees,whose computational accuracy and efficiency is investigated by comparing with Monte Carlo simulation technique.The results demonstrate that the FORM finite element reliability method can estimate global capacity of structures accurately and efficiently,which offers another alternative for global probabilistic seismic capacity analyses.