基于模糊可靠度的RC框架结构在地震作用下最可能失效构件的识别

计算结构体系可靠度的基础是对构件可靠度的计算，通过引入构件失效准则的模糊性，将构件失效作为模糊随机事件进行研究，通过计算得到构件在地震作用下的模糊随机可靠度，进而对RC框架结构在地震作用下最可能失效构件进行识别。结果表明：引入失效准则模糊性后，计算出的模糊随机可靠度指标要小于不考虑模糊性的常规可靠度指标，失效概率增大|选择不同的隶属函数分布形式和模糊区间对于模糊随机可靠度的计算均有一定的影响，所以在进行实际工程可靠度计算时，应根据实际情况选择合适的隶属函数和模糊区间。

An identification method for the most probable failure members of RC frame structure under earthquakes based on fuzzy reliability

Component reliability is the basis of calculating structure system reliability. In this paper, the fuzzy random events were studied by considering the fuzziness of the component failure criteria. The most probable failure members of the RC frame structure were recognized through analyzing the fuzzy random reliability of components under seismic excitations.  The results show that: fuzzy random reliability index which is considering the fuzziness is less than the conventional reliability index regardless of fuzziness and the failure probability is increased. The different choosing of membership function distributions and fuzzy interval have a certain degree of influence on the fuzzy random reliability calculation. So in actual engineering calculation, it should be chosen according to the actual situation.