论文部分内容阅读
在采用栓钉等柔性抗剪连接件的钢-混凝土组合梁的交界面上存在相对滑移变形,它不仅使梁的挠度增大,而且还使组合梁截面的弹性抗弯强度减小,现行换算截面法尚未考虑这一不利影响.本文通过滑移效应对组合梁抗弯强度影响的试验和分析,建立了考虑滑移效应的弹性和极限抗弯强度计算公式.结果表明,考虑滑移效应的弹性弯矩计算值与实测值吻合较好.考虑强度极限状态时钢梁部分截面进入强化阶段的有利影响,滑移对极限抗弯强度的影响可以忽略不计,对于完全剪力连接和横向配筋率不小于0.6%的组合梁,按照简化塑性理论的等效矩形应力模型得到的极限抗弯强度计算值与实测值吻合良好.
There is relative slip deformation at the interface of steel-concrete composite beams using flexible shear connectors such as studs, which not only increases the deflection of the beams, but also reduces the elastic bending strength of the composite beam sections. This unfavorable effect has not been considered in the conversion section method. In this paper, the elastic and ultimate bending strength calculation formulae considering the slip effect have been established through the experiment and analysis of the effect of slip effect on the flexural strength of the composite beam. The results show that the elasticity considering the slip effect is considered. The calculated value of the bending moment is in good agreement with the measured value. Considering the favorable influence of the partial section of the steel beam entering the strengthening stage in the limit state of strength, the effect of slip on the ultimate bending strength is negligible. For the complete shear connection and horizontal reinforcement ratio For the composite beam with not less than 0.6%, the calculated values of the ultimate bending strength obtained from the equivalent rectangular stress model of the simplified plasticity theory agree well with the measured values.