摘要:
对钢-混凝土组合楼盖面内变形对高层建筑结构分析的影响进行研究,提出考虑组合楼盖面内刚度的结构简化分析模型。通过算例分析,比较不同长宽比的组合楼板对高层建筑结构分析的影响。研究发现,钢-混凝土组合楼盖的面内刚度受到混凝土楼板尺寸、钢梁尺寸和钢梁位置的影响,对于不同的情况要分别计算。考虑组合楼盖的面内变形后,高层建筑中各榀抗侧力结构的侧向位移不再都相同,抗侧刚度较小的抗侧力结构的位移将比抗侧刚度较大的大,组合楼板面内变形的影响,随着楼板长宽比L/B的变化而不同,当L/B3时,忽略楼板弹性,即采用刚性楼板假定,误差均在5%以内;而当L/B4时,采用刚性楼板假定将产生较大的误差,此时应考虑组合楼板的面内变形。分析方法物理概念明确,计算结果合理可信,是分析带组合楼盖高层建筑结构的一种有效方法,可为结构设计中评价组合楼盖的隔板性能提供参考。
Abstract:
Research is conducted on the influence of the in-plane stiffness of stee-l concrete composite floor slab to the structure analyses of high-rise building. A simplified model is suggested considering the in-plane deformation of stee-l concrete composite floor slabs. Comparison is made to investigate the effects of different length-width ratios on the analyses of high-rise structure. The predicting results are reasonable and credible. This method is a valid approach to analyze high building with composite floor, which can provide some references for the evaluation of the composite diaphragm in engineering practice.