腹板嵌入式组合梁抗剪性能试验

Experimental Study on Shear Capacity of Embedded Composite Beam with Notched Web

摘要:

通过6个嵌入式组合梁抗剪试件的试验,观测组合梁受剪破坏过程,研究腹板嵌入式组合梁竖向抗剪承载力的各影响因素.试验表明,嵌入式组合梁的抗剪承载力和钢梁腹板截面、混凝土翼板截面、混凝土强度等级、混凝土翼板剪跨比有关.基于试验结果,通过参数回归分析,拟合出混凝土翼板的抗剪承载力的计算公式.考虑到弯剪相互作用,提出了嵌入式组合梁受剪承载力简化计算方法;分析了钢板连接件在嵌入式组合梁受剪时的实际受力.结果表明.钢板连接件具有较高的承载力,易于在组合梁中实现完全抗剪连接.

关键词:腹板嵌入式组合梁; 抗剪试验; 剪跨比; 抗剪承载力

Abstract:

Based on a test of 6 shear specimens,a research was made into the bearing capacity and failure process of the embedded composite beam. Test results show that the shear bearing capacity of the beam is influenced by the section of steel web, the section of concrete flange, the concrete grade and the shearspan ratio of concrete flange. Based on the test results and parametric analysis, the formulas to calculate the shear capacity of the concrete flange were developed. A simplified calculation method of shear bearing capacity was developed by taking the possibity into consideration that the shear bearing capacity of the beam may decrease when it is subjected to a moment and shear force.A study of the bearing capacities of the notched web connector in embedded composite beams shows that the connector is of a higher shear bearing capacity and the full shear connection can be easily achieved in embedded composite beams.

Key words:embedded composite beam with notched web; shear test; shearspan ratio; shear capacity