组合梁上层混凝土板弹塑性与剪力度关系分析  

Analysis on Relation between Elastic-plastic Behaviour and Shearing Degree of Upper Concrete Slab of Composite Beam

作　　者：郭发忠[1] 

机构地区：[1]浙江交通职业技术学院,浙江杭州311112

出　　处：《公路交通科技》2010年第8期51-54,75,共5页Journal of Highway and Transportation Research and Development

摘　　要：为了探讨双层组合连续梁的工程力学特性,分析双层组合梁连接剪力度对上层混凝土板弹塑性行为的影响,通过有限元软件Ansys10.0建立了三维空间模型,考虑了混凝土、剪力连接件、钢梁等材料的非线性,采用非线性弹簧单元combine39模拟剪力连接件,对双层组合梁的上层混凝土板弹塑性行为和剪力度关系进行了分析。结果表明,当剪力度增大到一定值时,开裂荷载不再随剪力度增大而增大,剪力度过大会导致上层混凝土板过早开裂,以致造成上层混凝土板承载力降低。In order to discuss the engineering mechanical characteristics of double-layer composite beam,a 3D model was set up to analyze the effect of shearing degree of double-layer composite beam on elastic-plastic behaviour of upper concrete slab with finite element software Ansys10.0.Considering nonlinearity of concretes,shear connector,steel girder and so on,the combine39 nonlinear spring unit was adopted to analyse the relation between shearing degree and elastic-plastic behaviour of upper concrete slab.The result indicates that（1） crazing load no longer increases when shearing degree increased to a certain value;（2） greater shearing degree would make upper concrete slab craze prematurely and reduce its bearing capacity.

关 键 词：桥梁工程 双层组合梁 有限元 剪力度 上层混凝土板 弹塑性行为 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1