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将结构连续倒塌的全概率方法应用于地震作用下的结构整体连续倒塌极限状态可靠度分析,采用构件可靠度方法对结构进行地震作用下最可能失效构件的识别,基于改进点估计法的随机Pushdown方法和随机竖向增量动力分析(竖向IDA)方法,进行完好和损伤结构的概率抗竖向连续倒塌能力分析及参数灵敏度分析。采用整体可靠度方法,分析了损伤结构的竖向连续倒塌条件失效概率。基于系统可靠度理论和全概率方法,分析了RC框架结构发生侧向增量倒塌以及构件地震损伤引起的结构竖向连续倒塌的联合失效概率。分析结果表明,按照我国现行规范设计的钢筋混凝土框架结构具有良好的抗连续倒塌能力。
The full probability method of continuous collapse of structure is applied to the reliability analysis of the ultimate structural integrity continuous collapse condition under earthquake. The component reliability method is used to identify the most probable failure components of the structure under seismic action. The random Pushdown Method and random vertical incremental dynamic analysis (vertical IDA) method are used to analyze the probability and anti-vertical continuous collapse ability of intact and damaged structures and the parameter sensitivity analysis. The overall reliability method is used to analyze the failure probability of vertical continuous collapse of damaged structures. Based on the theory of system reliability and the total probability method, the joint failure probability of RC frame structure with lateral incremental collapse and vertical structural collapse caused by structural seismic damage is analyzed. The analysis results show that the RC frame structure designed according to the current codes in our country has good capability of continuous collapse resistance.