摘要
利用ANSYS中的solid45建立了钢框架和组合梁-钢框架实体的有限元模型,分析了往复荷载下混凝土翼板厚度、强度及配筋率对梁截面应变分布及中和轴高度的影响,并与纯钢框架进行了对比。分析表明,钢梁与混凝土翼板的组合作用提高了钢梁截面中和轴,钢梁的上翼缘应力应变减小,下翼缘的应力应变增大,下翼缘比上翼缘更容易进入塑性,更容易发生断裂破坏。
The finite element model of a steel frame structure and composite beam-steel frame was established using the solid45 of ANSYS, the influences of thickness, strength and ratio of reinforcement of concrete wing plate under reciprocating load on beam section strain distribution and neutral axis height were analyzed, and it was compared with the pure steel frame. The analysis shows that, the composite action of the steel beam and the concrete flange plate improves the neutral axis of steel beam section, the upper flange stress strain of the steel beam decreases, the lower flange stress strain increases, compared with the upper flange, the lower flange accesses plasticity easily and is prone to breakage.
出处
《工程建设》
2013年第2期20-23,共4页
Engineering Construction
关键词
钢-混泥土组合梁
组合作用
应变
有限元分析
steel-concrete composite beam
composite action
strain
finite element analysis
