索穹顶结构几何拓扑布置的合理性

摘要

结构的鲁棒性一般可以定义为是结构体系在突发事件出现后维持其功能的稳健性能,它强调的是结构杆件分布拓扑关系的合理.本文以分析构件损伤的影响范围为切入点讨论索穹顶结构几何拓扑布置的合理性,通过计算影响范围的大小比较和确定构件的相对重要性,从而分析结构拓扑分布的合理性.在此基础上,可以进一步研究结构拓扑布置的优化,降低构件的影响范围,改善结构的鲁棒性.本文以Geiger型索穹顶为例说明这种思路.%The robustness of a structure generally can be defined as the property of system to maintain its function in risk event.it emphasizes that the geometric topology of structural components should be reasonable. To discuss the reasonableness, firstly the scope of influence of component with local damage is analyzed. By calculating the magnitude of the scope of damage influence, the relative importance for each component can be determined. Based on the present analysis,the optimization of gemetric topology of cable domes to reduce the scope of damage influence of components can be further considered, which will then improve the robustness of the structures. Finally,as a example,a Geiger cable is introduced to describe the present method.