索穹顶中考虑薄膜与索协同工作对结构性能的影响

索穹顶结构是一种新型的大跨度空间结构形式。目前对该类结构的受力性能研究一般仅考虑预应力索单元承受荷载，而忽略薄膜对功能力的影响，这并不能真实反映索穹顶结构的实际工作状况，并且这种简化计算是否偏于这民未经验证。针对这一问题，本文一个圆形平面Ｌｅｖｙ体系索穹顶结构计算模型，分别对两种方案进行极限承载力和位移的计算。通过对计算结果的分析比较，本文得到如下结论：仅考虑索单元承载所算得的索穹顶结构的极限承载

ANALYSIS OF CABLE DOME WITH CONSIDERATION OF THE JOINT ACTION OF MEMBRANE AND CABLE ELEMENT

Up to now, most researches on cable dome have been done on considering that steel cable is the main part to bear the load and membrane's effect on structural performance is omitted. It can not reflect cable dome's real working condition, and whether this omission is safe has not been verified. In order to resolve this problem, one model of a globar Levy system cable dome is fromed, and the limit load and displacement of the model are calculated on two different ways, one is considering cable element to bear the load, the other is considering the joint action of membrane and cable element. Base on the analysis of calculation results, a conclusion is drawn as following: when we only consider cable element to bear the load, the limit load and rigidity of cable dome are larger than those when the cooperation of membrane and cable element is considered as cable dome's real working condition. So considering the cooperation of membrane and cable element is necessary to analysize the cable dome's loading bearing capacity. [