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(1 同济大学土木工程防灾国家重点实验室，上海 200092; 2 同济大学土木工程学院，上海 200092)

［摘要］基于传统钢-混凝土组合梁提出了一种节省钢材且具有较高抗剪承载力的新型组合梁——腹板嵌入式钢-混凝土组合梁，由倒T形钢梁腹板上部开槽，嵌入到混凝土翼板中形成。通过4个局部受压试件的试验得出，腹板嵌入式组合梁局部受压承载力随混凝土强度等级和局部荷载作用下扩散应力分布面积的增加而提高。综合各影响因素推导出了腹板嵌入式组合梁中连接件的局部受压承载力计算公式，并提出进行局部受压设计时对横向配筋率和应力扩散深度的构造要求。通过理论计算值与试验结果的对比，验证了公式的适用性。

［关键词］腹板嵌入式组合梁；抗剪连接件；局部受压试验

Experimental study of local compressive performance of the shear connector in web-embedded composite beams

Li Guoqiang^1,2, Li Xianhui²(1 State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China; 2 College of Civil Engineering, Tongji University, Shanghai 200092, China)

Abstract:Based on the ordinary steel-concrete composite beam,a novel web-embedded composite beam,which has higher shear bearing capacity and can save steel,is proposed.The embedded composite beam is composed by the steel beam with reverse T section which has notches on the top of the web and is embedded in the concrete slab.Through the experiment of 4 local compressive specimens,it shows that the local bearing capacity of the web-embedded composite beam increases with the improvement of the concrete grade and the stress diffusion area of the local compressive load.Concerning different influence factors of the local compression bearing capacity,the formula to calculate the local compression bearing capacity of the web-embedded composite beams is concluded and the configuration requirements on transverse reinforcement ratio and the stress diffusion depth in web-embedded composite beams are proposed.By comparing the experimental and the theoretic results,the formulas proposed are verified.

Keywords:web-embedded composite beam; shear connector; local compression test

*国家科技支撑计划项目“高性能建筑结构设计关键技术研究”(2006BAJ01B02)。

作者简介：李国强，博士，教授，Email:gqli@tongji.edu.cn。

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