钢-混凝土组合梁负弯矩裂缝非线性有限元模拟分析

The Nonlinear Finite Element Analysis on Crack of Negative Bending Moment Area in Steel-Concrete Composite Girder

在模拟组合梁负弯矩区工作性能的单跨倒置简支组合梁试验的基础上,结合普通钢筋混凝土构件的有限元非线性分析方法,引进钢梁单元,采用涂抹式裂缝模型和正交各向异性的混凝土材料模型,建立了针对模拟组合梁负弯矩区的单跨倒置简支组合梁的裂缝非线性模型,以试验梁为对象进行了非线性分析及裂缝模拟,其计算结果与试验结果吻合良好.

Based on our experiments,the steel beam,smeared crack model and orthotropic concrete model are introduced.This paper presents the crack model of inverted simple supported steelconcrete composite beams.The nonlinear analysis and crack simulation of a tested beam are presented with the help of the crack model.The computed results coordinate with the experiments.Keywords:composite beams;negative bending moment area;crack;nonlinear finite element