等效单轴本构模型在结构抗裂分析中的应用  

Application of the Equivalent Uniaxial Constitutive Model in Cracking Analysis of Structure

作　　者：王潘绣[1] 

机构地区：[1]金陵科技学院建筑工程学院,南京211169

出　　处：《特种结构》2015年第1期81-84,共4页Special Structures

摘　　要：正确预测结构可能开裂位置、判定开裂风险对合理采取抗裂控制措施具有重要的指导作用。本文采用等效单轴本构模型编写混凝土结构非线性有限元软件,并结合渡槽混凝土结构计算模型,分析了渡槽在设计水深工况下结构应力场分布规律和抗裂性能。分析结果表明:渡槽应力除支座附近以及拉杆和槽身交界处小范围内拉应力集中外,槽身部分应力均较小,小于C30混凝土抗拉强度,不会发生结构开裂。The reasonable cracking control method is depended on prediction of cracking location and cracking risk.In this paper,a equivalent uniaxia constitutive model was used to write the nonlinear finite element software of concrete structure.And then a concrete aqueduct structure calculation model under the projected depth was analyzed and the stress field distribution and crack resistance were discussed.The results show that：the stress of concrete aqueduct is small besides the steady and the junction of bar and main body.This stress is smaller an the tensile strength of C30,so the concrete aqueduct would not crack.

关 键 词：等效单轴 混凝土 抗裂性能 有限元方法 

分 类 号：TV544[水利工程—水利水电工程]