【摘要】 本文给出了自重和地震作用下核电厂混凝土安全壳的可靠性分析方法。首先基于半解析有限环元法和随机振型分析法,用首超概率给出了给定系统参数时安全壳的条件极限状态概率,然后基于此概率用推广的一次二阶矩法求解了考虑系统参数不确定性的安全壳极限状态概率。一个预应力混凝土安全壳的实例分析表明,系统参数的不确定性对安全壳的可靠性有重要影响。更多还原

【Abstract】 The reliability analysis of concrete containment structures subjected to combination of static and earthquake loads is presented. At first,the conditional limit state probability for given parameters is calculated then based on it the limit state probability with consideration of parameter uncertainties is computed by using advanced first order second moment method. As an example a prestressed concrete containment is analyzed. The results show that the parameter uncertainties have significant influence on the containment reliability and should be considered in reliability analysis.更多还原