基于随机化Pushover的结构整体抗震可靠度参数分析

为了研究使用随机化Pushover方法进行RC框架结构整体抗震可靠度计算过程中相关参数的适应性,使用Matlab调用SAP2000编制出基于随机化Pushover的结构整体抗震可靠度程序,以一榀11层RC框架结构为例,通过该程序统计出不同参数下结构最大层间位移角的分布情况及整体失效概率,并以大样本实际地震波进行时程分析所统计出的相应结果为基准进行对比。结果表明,在常规参数设置下随机化Pushover方法统计出的最大层间位移角分布情况和结构整体失效概率与大样本时程分析结果有较大差异,然后提出了一种修正方式,有效地减小了两者的差异,并以某算例验证了该修正方式的适用性。

Parameter Analysis of Structural Global Seismic Reliability Based on Randomized Pushover Method

To investigate the applicability of relevant parameters in the process of globalseismic reliability calculation of reinforced concrete (RC) frame structures bymeans of randomized Pushover method, a structural global seismic reliability program based on randomized Pushover method was compiled by calling SAP2000 usingMatlab. An eleven-story RC frame structure was established to calculate the distribution of maximum story drift angel and the global failure probability using the program. The calculated results were compared with statistical results of thetime-history analysis under a large sample of real seismic waves. The comparison shows that the distribution of the maximum story drift angel and the structural global failure probability obtained using the two methods were significantly different. Based on this, a correction method was proposed to greatly reduce thedifferences and an example was given to verify the applicability of this method.