基于损伤的混凝土大坝可靠度分析

详细信息

RELIABILITY ANALYSIS OF CONCRETE DAM BASED ON DAMAGE CONCEPT

Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China;2. Kunming University of Science and Technology, Kunming 650093, China

摘要: 研究了基于损伤概念的混凝土结构可靠度分析方法.通过引入损伤边界面的概念,导出了包含损伤变量的四参数Hsieh-Ting-Chen边界面模型.在此基础上,构造了大体积混凝土结构对应于初始损伤边界面的极限状态方程.通过响应面法和有限元分析的结合,对功能函数进行了拟合,建立了可以用于复杂结构可靠度分析的有效模式.用该模式对一座混凝土重力坝进行了实例分析,得到了较为满意的结果.
- 混凝土结构 /
- 可靠度 /
- 损伤边界面 /
- 响应面 /
- 重力坝
Abstract: Reliability analysis considering damage effect of materials is studied for concrete structures. The damage bounding surface concept is introduced to develop the modified four parameter Hsieh-Ting-Chen model. Based on the modified model, a limited state function corresponding initial damage surface is constituted to study the safety of huge bulk concrete structures. Combining the response surface method and the finite element method to fit the limited state function, an approach that can be used to analyze reliability of complicated structures is established. As an example, a gravity dam is selected to study its reliability under static and dynamic loads with the approach. Satisfactory results are obtained.
- concrete structure /
- reliability /
- damage bounding surface /
- response surface method /
- gravity dam