钢-混凝土连续组合梁非线性有限元分析  

Nonlinear Finite Element Analysis for Prestressed Steel and Concrete Composite Beam

作　　者：周凌宇[1] 余志武[1] 蒋丽忠[1] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075

出　　处：《长沙铁道学院学报》2003年第2期9-13,共5页Journal of Changsha Railway University

基　　金：国家自然科学基金资助项目(59878007)

摘　　要：建立了钢 混凝土连续组合梁非线性有限元模型.该模型可以考虑材料非线性界面相对滑移对钢 混凝土连续组合梁受力性能的影响.利用该模型,对四榀钢 混凝土连续组合梁的界面滑移和挠度进行了仿真计算,将计算结果和实测结果进行了比较,验证了该模型的有效性.对单个栓钉的受力全过程进行了分析,表明按照弹性方法设计的栓钉在加载后期进入塑性阶段变形增加,是试件加载后期滑移迅速增长的原因.A newer nonlinear finite clement model is presented.The model takes into account the effect by nonlinear material,slip between concrete and steel beam and prestress as well.Four samples of steel and concrete composite beam are calculated with the model.The calculated result is compared with the test result so as to testify the practicability of the model.The whole work course of stub in native moment is analyzed.It indicates that the stub's trasition into plastic stage and deformation increase are the reasons that lead to slip increase in loading upper stage.

关 键 词：组合梁 非线性 有限元 挠度 界面滑移 

分 类 号：TU311.1[建筑科学—结构工程]