论文部分内容阅读
为研究腹板开洞连续组合梁的内力重分布性能,对6根组合梁试件进行试验研究,研究参数为混凝土板厚和配筋率;对7根组合梁进行有限元计算,研究参数为洞口尺寸和洞口位置。结果表明:开洞组合梁不仅在塑性状态下会发生弯矩重分布,而且还存在洞口引起的“弯矩重分布”。混凝土板厚度增加可以减少组合梁弯矩调幅,配筋率增加能提高组合梁的弯矩调幅。随着洞口宽度和高度的增加,组合梁的弯矩调幅增大。另外发现,洞口位置对组合梁承载力和内力重分布有显著的影响。
In order to study the internal force redistribution performance of continuous composite beams with open webs, six composite beam specimens were studied with the parameters of concrete slab thickness and reinforcement ratio. The finite element analysis of seven composite beams was carried out. The parameters were Hole size and hole location. The results show that not only the bending moment distribution of the composite beam with openings in the plastic state but also the distribution of the bending moments caused by the hole are also found. Increasing the thickness of the concrete slab can reduce the AM moment of the composite beam. Increasing the reinforcement ratio can improve the AM moment of the composite beam. As the width and height of the hole increase, the bending moment of the composite beam increases. In addition, it is found that the location of the hole has a significant effect on the bearing capacity and internal redistribution of composite beams.