多维多点输入下大跨空间网格结构的可靠度分析

Aseismic Reliability Analysis of Long-span Space Lattice Structures under Multi-dimensional and Multi-support Excitation

本文同时考虑地震动两个水平向和一个竖直向共三个平动分量,并考虑了地震动场的空间相关性,在虚拟激励反应谱法的基础上,对大跨空间网格结构进行了多维多点输入和多维一致输入下的抗震可靠度分析。考查了两种输入方法下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。

In this paper, the aseismic reliability of long-span space lattice structures subjected to multi-dimensional and multi-support excitation, as well as to multi-dimensional and simple-support excitation are thoroughly analyzed based upon the pseudo-excitation response spectrum method. The aseismic reliability obtained by the multiple support excitation is compared to that investigated by the simple support excitation, such as the difference in the distribution and the amount of dangerous elements. The relationship between the dangerous elements and the span, as well as the apparent velocity is studied also.