虚拟层合板壳单元法在结合梁桥力学分析的应用

研究目的:钢一混结合梁是城市轻轨、客运专线等铁路建设中桥梁结构型式的发展方向之一。经典的有限元分析方法模型处理烦琐、单元剖分数量多,计算费时、结构的分析效率较低,并且不易准确模拟结构的实际受力特性,有必要寻找更为简便有效的结构分析方法。研究结果:多种方法的结果对比及分析表明了虚拟层合单元法的有效性、准确性及良好的适用性,为钢一混结合梁的力学分析提供了一种可靠有效的方法。

The Method of Virtual Laminated Shell Element and Its Application in Analysis of Steel-concrete Composite Structure Bridge

Research purposes:With the great development of Chinese railway construction,steel-concrete composite girders probably have a good development potential became of its many merits.Classical FEM has many defects such as more elements,time-spending,low computing efficiency.In order to model the composite structures easily and explore its particular mechanical performance such as shear lag,warping effects and distortion effects,a new simple and efficient structural analytical method must be proposed. Research results:Results of different method are compared and in good coincidence which indicates that such method is efficient,correct and applicable.A new method is provided for mechanical performance analysis of steel-concrete composite structures.