预应力混凝土箱梁塑性损伤分析  

Analysis on Plastic Damage of Prestressed Concrete Box Girder

作　　者：袁明[1] 袁晟[1] 颜东煌[1] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410114

出　　处：《公路交通科技》2016年第11期86-92,共7页Journal of Highway and Transportation Research and Development

基　　金：国家重点研究基础发展计划(九七三计划)项目(2015CB057706);国家自然科学基金项目(51108046;51178058;51178059);湖南省自然科学基金项目(13 JJ6049);贵州省交通运输厅科技项目(2014122019);湖南省高校创新平台开发基金项目(14K005)

摘　　要：为了准确模拟预应力混凝土箱梁在荷载作用下的极限承载能力及其开裂状态,采用非线性有限元方法对其进行塑性损伤模拟分析,并将模拟结果与试验数据进行对比验证。混凝土箱梁塑性损伤分析结果表明:将损伤因子引入预应力混凝土箱梁的非线性分析方法可行,且能准确地获取结构抗弯抗剪性能及破坏特征;单调荷载作用下损伤因子对结构极限承载能力有较大的影响;混凝土箱梁的塑性损伤分析应选用合适的损伤因子计算方法。In order to accurately simulate the ultimate bearing capacity and crack state of prestressed concrete box girder under load, the plastic damage of the box girder is analysed by using nonlinear finite element method, and the simulation result is compared with the experimental data. The analysis result of plastic damage of concrete box girder shows that （1） it is feasible to introduce the damage factor into the nonlinear analysis of prestressed concrete box girder, and it can obtain the structural＇s bending shear resistance and failure characteristics accurately; （ 2 ） damage factor has great influence on the structural ultimate bearing capacity under monotonic loading; （ 3 ） analysing plastic damage of concrete box girder should choose appropriate calculation method of damage factor .

关 键 词：桥梁工程 预应力混凝土 塑性损伤 损伤因子 非线性分析 箱梁 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]