简支钢混凝土组合梁承载力的非线性有限元分析

Nonlinear Finite Element Analysis of Capacity of Composite Beams

简支钢混凝土组合梁的承载力是组合梁最重要的性能之一.本文分别考虑了钢材和混凝土材料的非线性性能,弯筋剪力连接件的非线性关系,采用非线性有限元方法对4根简支钢混凝土组合梁进行了受力全过程的计算分析.并将计算结果与有关的实验结果进行了对比分析.分析结果表明,采用本文的非线性计算模型和计算方法与实验结果较为吻合,验证了采用非线性有限元方法分析钢混凝土组合梁的可靠性.

The bearing capacity is one of the most important performances for the steel and concrete composite beams. Using nonlinear finite element method, taking into account the nonlinear performances of steel and concrete respectively and the nonlinear relation of bending steel connectors, this paper calculates and analyzes the whole bearing process of four steel and concrete composite beams, moreover compares calculating results with experimental results. From the analysis results, we can know that the results of using calculating model and method in this paper coincide with the experimental results, which proves that the reliability of finite element method.