腹板嵌入式组合梁抗弯性能理论和试验研究  

Theoretical and Experimental Analysis of Bending Behavior of Composite Beam with Notched Web

作　　者：李国强[1,2] 李亮[1] 李现辉 司林军[1] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]同济大学土木工程防灾国家重点实验室,上海200092 [3]河南徐辉建筑工程设计事务所,郑州450008

出　　处：《土木建筑与环境工程》2011年第3期1-7,30,共8页Journal of Civil,Architectural & Environment Engineering

基　　金：国家科技支撑计划项目(2006BAJ01B02)

摘　　要：提出了一种新型腹板嵌入式钢-混凝土组合梁,并对该组合梁的整体抗弯性能和抗剪性能进行了研究。首先阐述了腹板嵌入式钢-混凝土组合梁的构成、受力特点和主要优点,然后介绍了该组合梁的抗弯承载力、钢梁与混凝土翼板之间的滑移以及挠度计算公式。通过竖向荷载作用下的静力加载试验对4个腹板嵌入式钢-混凝土组合梁试件的抗弯承载力、滑移影响及破坏特征进行了足尺试验研究,并利用有限元方法对4个试件的试验结果进行了对比,最后将理论公式得到的腹板嵌入式钢-混凝土组合梁的抗弯承载力、滑移及挠度计算结果与试验及有限元分析的结果进行比较,验证了理论公式的可靠性。研究表明,腹板嵌入式钢-混凝土组合梁具有良好的整体抗弯性能及抗剪性能,能够节约钢材。A new kind of steel-concrete composite beam with notched web is proposed,and the bend and shear behaviors of this composite beam are investigated.First of all,the constitution,bearing characteristics and merits of the steel-concrete composite beam with notched web are introduced;then,a group of formulas about the bending capacity,slip between the steel beam and the concrete flange,and the deflection are introduced;after that,the bending behavior,slip effect and bearing characteristic of the steel-concrete composite beam with notched web are studied on 4 specimens,which are tested by applying two concreted vertical loads on the top of concrete flange.And the finite element model is adopted to analyze the results of the 4 specimens;finally,the reliabilities of the formulas are verified by comparing the results of theoretical formulas,the results of tests and that of finite element analysis.Study shows that the bend behavior and shear behavior are fine,and the popularization of this new kind of composite beam which can be broadly used in building engineering will save the consumption of steel.

关 键 词：组合梁 梯形连接件 倒T型钢梁 抗弯承载力 

分 类 号：TU375.1[建筑科学—结构工程]