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(1 同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室，上海 200092; 2 同濟(jì)大學(xué)土木工程學(xué)院，上海 200092)

［摘要］基于傳統(tǒng)鋼-混凝土組合梁提出了一種節(jié)省鋼材且具有較高抗剪承載力的新型組合梁——腹板嵌入式鋼-混凝土組合梁，由倒T形鋼梁腹板上部開槽，嵌入到混凝土翼板中形成。通過4個局部受壓試件的試驗(yàn)得出，腹板嵌入式組合梁局部受壓承載力隨混凝土強(qiáng)度等級和局部荷載作用下擴(kuò)散應(yīng)力分布面積的增加而提高。綜合各影響因素推導(dǎo)出了腹板嵌入式組合梁中連接件的局部受壓承載力計(jì)算公式，并提出進(jìn)行局部受壓設(shè)計(jì)時(shí)對橫向配筋率和應(yīng)力擴(kuò)散深度的構(gòu)造要求。通過理論計(jì)算值與試驗(yàn)結(jié)果的對比，驗(yàn)證了公式的適用性。

［關(guān)鍵詞］腹板嵌入式組合梁；抗剪連接件；局部受壓試驗(yàn)

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

*國家科技支撐計(jì)劃項(xiàng)目“高性能建筑結(jié)構(gòu)設(shè)計(jì)關(guān)鍵技術(shù)研究”(2006BAJ01B02)。

作者簡介：李國強(qiáng)，博士，教授，Email:gqli@#edu.cn。

參考文獻(xiàn)

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［3］李國強(qiáng),李現(xiàn)輝. 腹板嵌入式鋼混凝土組合梁施工階段受力性能研究［J］. 土木工程學(xué)報(bào)，2009,42(12):61-68.

［4］李現(xiàn)輝,李國強(qiáng). 腹板嵌入式組合梁中抗剪連接件推出試驗(yàn)［J］.建筑結(jié)構(gòu)學(xué)報(bào)，2009,30(4):78-84.

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