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针对基础隔震对核岛厂房抗震性能的作用评估问题,首次对核岛辅助厂房抗震性能指标的划分进行了探讨,建立了坚硬土场地下隔震和非隔震核岛厂房的数值模型;分别基于IDA和MSA方法得到的易损性曲线,根据该指标进行了隔震和非隔震结构的抗震易损性对比研究,论证了隔震措施可提高结构的抗倒塌安全储备。分析结果表明,两种方法得到的结果基本上一致,这证明了结果的合理性。隔震支座能明显降低核岛厂房的失效概率,降低幅度最大可达到23%,隔震厂房在大震下发生倒塌的概率要比非隔震厂房降低80%,安全储备系数提高了11%,并且混凝土失效概率对两种厂房整体失效概率起控制作用。
Aiming at the evaluation of the effect of base isolation on the seismic performance of nuclear island buildings, the division of seismic performance indexes of auxiliary buildings in nuclear island is discussed for the first time. The numerical model of underground isolated and non- Based on the vulnerability curves obtained by IDA and MSA methods, a comparative study on the seismic vulnerability of isolated and non-isolated structures is carried out based on this index. It is demonstrated that isolation measures can improve the structural safety of anti-collapse. The analysis results show that the results obtained by the two methods are basically the same, which proves the rationality of the result. Isolation bearings can significantly reduce the probability of failure of nuclear island plant, the maximum reduction of up to 23%, the probability of earthquake isolation plant under the earthquake occurred 80% lower than the non-isolation plant, the safety reserve coefficient increased by 11% , And the probability of concrete failure plays a controlling role on the overall failure probability of two kinds of workshops.