部分抗剪连接钢-混凝土组合梁抗弯极限承载力的实用计算方法

Applied method on ultimate flexural capacity of steel-concrete composite beams with partial shear connection

在承载力和变形许可的条件下,钢-混凝土组合梁采用部分抗剪连接可以方便施工、降低造价.由于没有考虑界面纵向滑移及竖向掀起效应的影响,钢结构设计规范中,部分抗剪连接组合梁抗弯强度的计算值在某些情况下将偏于不安全.通过对规范中部分抗剪连接和完全抗剪连接组合梁抗弯强度计算的对比分析,并结合国内4根部分抗剪连接组合梁的试验研究结果,建立了考虑界面纵向滑移及竖向掀起影响的部分抗剪连接组合梁受弯极限承载力的计算方法.计算结果表明,按照该方法得到的计算值与实测值吻合良好.

If the condition of flexural capacity and deflection is satisfied, partial shear connection can be used for the design of composite steel-concrete beams, which is beneficial to cost reduction and construction convenience. Shear connection degree has an effect on the flexural capacity. Without consideration of interface portrait slip and vertical lift, the flexural capacity calculated from composite beams with partial shear connection is not safe in the Code for design of steel structures. According to the contrast analyze on the flexural capacity calculated from composite beams with partial and complete shear connection and analyses of test results of 4 composite steel-concrete beams with partial shear connection, the formula are derived for the ultimate flexural capacity of partial shear connection composite steel-concrete beams with consideration of interface portrait slip and vertical lift. The predicted values are in good agreement with experimental results.