大跨度结构在多维多点地震激励下的响应分析

THE SEISMIC PERFORMANCE ANALYSIS OF LARGE-SPAN STRUCTURES UNDER THE MULTI-DIMENSIONAL AND MULTI-SUPPORT SEISMIC EXCITATION

基于随机地震动场理论,人工合成与工程条件相一致的空间相关非平稳地震动场,并对其进行相关分析。在此基础上,对一般大跨空间结构在多维多点地震激励与多维一致地震激励两种荷载工况下的反应进行数值模拟对比分析,考察大跨空间结构柱子剪力、扭矩、梁弯矩和节点位移的变化规律,并得出一些重要结论。此结果可为大跨空间结构抗震设计提供参考。

Based on the random earthquake field theory,the spatial correlation and non-stationary shaking field with engineering conditions was artificially synthesized,and its correlation analysis was worked in this paper.The seismic response of the general large-span structures was carried on the numerical simulation analysis under multi-dimensional and multi-support seismic excitation,multi-dimensional and uniform seismic excitation,and the reaction rule of pillars shear,pillars torque,beam bending moment and node displacement for the general large-span structures were researched,then some important conclusions were get.These results would provide the reference for the seismic design of a long-span space structure.