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钢筋混凝土框架结构体系可靠度是评定结构抗震性能的重要指标,也是对既有结构进行加固的评估基础。以框架底层柱端极限弯矩承载力作为参考变量可有效评估框架结构体系可靠度,该方法采用Pushover静力推覆分析,通过研究框架结构底层柱端极限弯矩承载能力对Pushover曲线的影响规律,由Pushover曲线上的基准点推广得到结构失效响应面,从而计算出结构体系可靠度。应用该方法对一榀钢筋混凝土框架进行了体系可靠度计算,计算结果与直接响应面法和蒙特卡洛法分析结果进行对比,结果表明,该方法计算快捷,且能够很好地评估出框架体系抗震可靠度。
The reliability of RC frame structure system is an important index to evaluate the seismic performance of the structure and also the basis for the assessment of the reinforcement of the existing structure. Taking the ultimate bending moment capacity of the bottom of the frame as the reference variable, the reliability of the frame structure system can be effectively evaluated. The Pushover static nappe analysis is used to study the influence law of the ultimate bending moment load capacity The structural failure response surface was generalized from the reference points on the Pushover curve to calculate the structural system reliability. This method is applied to calculate the system reliability of a reinforced concrete frame. The calculated results are compared with the results of direct response surface method and Monte-Carlo method. The results show that the method is fast and can evaluate the frame system Seismic reliability.