多点输入下大跨空间网格结构的可靠度分析

Aseismatic Reliability Analysis to Long-Span Space Lattice Structures under Mutiple Support Excitation

在虚拟激励反应谱法的基础上进行了多点输入下大跨空间网格结构的可靠度分析,并且将之与一致输入下结构抗震可靠度的分析结果进行了对比,考查了两种输入方法下杆件内力可靠指标之间的变化,进而分析了危险杆件在结构分布、数量等方面的差异以及危险杆件随结构跨度、视波速的变化关系。通过工程实例可以看出本文的分析方法对于分析大跨度网架、网壳这样复杂结构在多点输入下的抗震性能非常合适,为理论研究向实际应用搭建了桥梁。

The aseismatic reliability of long-span space lattice structures with multiple support excitation based on the pseudo-excitation response spectrum method is analyzed and compared with one under simple support excitation,the variation of the reliability index of each element is investigated simulataneously.Furthermore the relations of distribution and number of dangerous elements with the span and apparent velocity are deduced.It indecates that the method is applicable to the aseismatic property analysis of compliex structures under multiple support excitation,such as long-span space truss,long-span space lattice shells.