论文部分内容阅读
复杂结构的安全度取决于主要失效模式,但现有的拱坝安全度评价方法较少考虑失效模式。本文基于非概率理论的结构体系安全度评价方法,考虑坝体初始开裂位置的随机性,由非概率可靠度指标最小来搜索拱坝所有可能的失效模式。分别对各种失效模式利用给出的结构体系安全度评价方法进行计算,最小值即为拱坝的非概率可靠度。算例综合考虑拱坝的各种可能失效模式,得到整个拱坝的非概率可靠指标为1.84,更全面合理地给出拱坝的安全度。
The safety of complex structure depends on the main failure mode, but the existing safety assessment of arch dam less consider the failure mode. Based on the non-probabilistic theory of safety evaluation of structural system, considering the randomness of the initial cracking position of dam, all possible failure modes of arch dam are searched by the minimum non-probabilistic reliability index. The safety evaluation of structural system given by various failure modes is calculated respectively. The minimum value is the non-probabilistic reliability of arch dam. The example considers all possible failure modes of the arch dam comprehensively and obtains the non-probabilistic reliability index of the whole arch dam as 1.84, which gives the safety of the arch dam more comprehensively and rationally.