大跨度开口钢箱-混凝土组合箱梁有限元参数分析

基于钢-混凝土组合箱梁的试验研究,利用有限梁段法对考虑滑移剪切的组合箱梁进行非线性有限元分析,分析结果与试验结果吻合良好。在此基础上对影响组合箱梁力学性能的主要因素,即剪力连接度、腹板高厚比、力比和初始不平整度等进行有限元参数分析。得到不同设计参数对组合箱梁承载力、刚度、滑移、剪力滞后等力学性能的影响规律。

Parametric analysis of long-span steel-concrete composite box beam

Based on the experimental research of steel-concrete composite box beam,with finite element software CBAP1.0,a series of composite box beams are analyzed for the slip and shear.The results of analysis are in good agreement with those of experiments.On this basis,parametric analysis with degrees of shear connection,ratio of height to thickness of web,force ration and initial degree of non-plane,which have influence upon the mechanic performance of composite box beam,is conducted.It is shown by the result that the different degrees of shear connection,ratio of height to thickness of web and initial degree of non-plane have a great impact on the strength,stiffness and slip of composite box beam,however,force ration is less significance.