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提出一种节省钢材且具有较高受剪承载力的新型组合梁——腹板嵌入式钢-混凝土组合梁,它是将倒T形钢梁腹板上部开槽,嵌入到混凝土翼板中形成的组合梁。通过10个推出试件的试验,研究腹板嵌入式组合梁中钢板连接件的受剪承载力。推出试验结果表明,连接件的受剪承载力随混凝土强度等级、钢板厚度增加而提高。基于试验结果,通过参数回归分析,拟合出嵌入式组合梁连接件受剪承载力计算公式,并提出连接件的构造要求。通过与普通组合梁中栓钉连接件受剪承载力的比较表明,腹板嵌入式钢-混凝土组合梁中钢板连接件具有承载力高、易于实现完全抗剪连接的优点,而且连接件抗剪连接刚度大,可以减少组合梁由于滑移效应引起的刚度折减。
A new type of composite beam-webbed embedded steel-concrete composite beam which saves steel and has high shear capacity is proposed. The upper part of the web of inverted T-shaped steel beam is notched and embedded in the concrete flange The combination of beams. Through the test of 10 launched specimens, the shear capacity of the steel plate connectors in web-embedded composite beams was studied. The test results show that the shear capacity of the connector increases with the strength of concrete and the thickness of the steel plate. Based on the test results, the formula of shear bearing capacity of the embedded composite beam is fitted by parameter regression analysis, and the construction requirements of the connector are proposed. The comparison of the shear capacity with the bolted joint in ordinary composite beams shows that the steel plate connectors in the web embedded steel-concrete composite beams have the advantages of high bearing capacity and easy realization of complete shear connection, and the connection shear stiffness Large, can reduce the composite beam stiffness reduction due to slip effect.