摘要
采用有限元方法计算坝体内的应力,以可能的拉应力范围作为作用效应,容许的拉应力范围作为抗力,建立了与重力坝设计规范中有限元分析结果相对应的抗拉极限状态方程.由于此极限状态方程为隐式,故采用一阶响应面法求解可靠度,并运用正交试验设计方法减少有限元分析次数.本文以龙滩碾压混凝土重力坝为例,给出了实例计算分析结果.
In the paper, the FEM is used to obtain the dam stress, and the limit state equation of tensile reliability for gravity dams is established with the possible tensile stress distribution width being set as action effect and the allowable tensile stress distribution width being set as resistance. This limit state is implicit. The linear response surface method is applied and the orthogonal test design method is used to reduce the number of finite element analysis. The Longtan RCC gravity dam is taken as an example and the analysis results are also given.
出处
《水利水运工程学报》
CSCD
北大核心
2009年第4期100-104,共5页
Hydro-Science and Engineering
基金
国家自然科学基金资助项目(90510017)
关键词
重力坝
有限元
抗拉可靠度
响应面法
gravity dam
finite element
tensile reliability
response surface method
