地震作用下钢筋混凝土安全壳的SCA可靠性分析

SCA RELIABILITY ANALYSIS OF RC CONTAINMENT UNDER SEISMIC LOADING

以秦山核电站的钢筋混凝土安全壳为工程背景，分析了结构在地震作用下的可靠度并给出其年破坏概率。安全壳结构模型为壳体有限单元组成的结构系统，系统可靠度分析的稳定构形法（简称ＳＣＡ）被用来求结构系统的破坏概率。通过随机振动分析，将结构所受地震作用等效为沿壳体分布的静态力。单元极限状态分别考虑混凝土压碎和钢筋屈服两种情况。最后的数值结果证明秦山核电站安全壳具有足够的抗震安全性。

Reliability evaluation was made on the reinforced concrete containment of Qinshan Neuclear Power Plant.The Stable Configuration Approach,so called SCA,was employed to calculate the structural system failure,probability of FEM maodel,Through random vibration analysis, seismic loading was converted to static force. As to element limit state,both concrete crushing and reinforcement yielding were considered. Numerical results show that the RC containment of Qinshan Neuclear Power Plant is adequately safe under earthquake.