混凝土损伤对重力坝可靠度的影响  

Influence of Concrete Damage to the Reliability of Gravity Dam

作　　者：徐忠义[1] 武清玺[1] 武运磊 

机构地区：[1]河海大学力学与材料学院,江苏南京210098 [2]南京市鼓楼区中小学校舍管理办公室,江苏南京210009

出　　处：《人民黄河》2014年第5期96-98,共3页Yellow River

摘　　要：混凝土重力坝运行若干年后或多或少都会出现一定的损伤,可能会严重影响重力坝的结构可靠度。基于混凝土损伤的基本原理,引入了损伤变量、有效应力和混凝土损伤模型等基本概念,利用材料力学原理建立了重力坝沿建基面的抗滑稳定、坝趾抗压强度和坝踵抗拉强度的功能函数,结合混凝土损伤及重力坝功能函数建立了极限状态方程。运用JC法对某一典型混凝土重力坝进行了实例分析,并针对坝高做了敏感性分析,得到了较为满意的结果。Due to the reasons such as the bad construction quality and dam aging,there are always some damages in the body of concrete gravity dam. Based on the basic principles of concrete damage,this paper introduced some basic concepts,such as the damage variable and effective stress and damage model of concrete,and so on. It used the principle of material mechanics building anti-sliding stability of gravity dam along the base surface and compressive strength of dam toe and tensile strength of dam heel functions,combined with concrete damage and gravity dam functions to establish a limit state equation. Using the JC method on analysis of a typical concrete gravity dam,it made the sensitivity analysis for the height of the dam and the satisfactory results had been achieved.

关 键 词：重力坝 可靠度 混凝土 损伤 

分 类 号：TV331[水利工程—水工结构工程]