大跨度空间结构多维地震作用下行波效应分析  

Travelling-Wave Effect Analysis Of Long-Span Spatial Structure Under Multi-component Earthquake Excitations

作　　者：姜亚雄 Jiang Yaxiong(CCCC Second Harbor Consultants Co.,Ltd.,Wuhan Hubei 430060,China)

机构地区：[1]中交第二航务工程勘察设计院有限公司,湖北武汉430060

出　　处：《港工技术》2022年第1期40-44,共5页Port Engineering Technology

摘　　要：煤棚网壳跨度125 m,须进行多维地震作用下的行波效应分析。本文首先对结构进行了振型分解反应谱分析,然后采用时程分析法,进行多维地震作用下行波效应分析。将多点输入结果与单点输入结果进行比较,得出结构为多点输入条件下内力显著提高。根据分析结果,对设计提出建议,采用反应谱法内力放大的方法考虑行波效应影响,本工程的放大系数取为1.4~1.5。本文为大跨度空间结构在设计中如何考虑行波效应的影响提出了一种思路。Span of lattice shell of coal shed is 125 m,In this paper, the mode decomposition response spectrum analysis of the structure is carried out,then the travelling-wave effect analysisis used to analyze multi-component earthquake excitations.Comparing the results of multi-point input with that of single point input, the internal force of the structure under multi-point input is significantly increased.According to the analysis results, the design suggestions are put forward,the influence of traveling wave effect is considered by internal force amplification of response spectrum method,the amplification factor of the project is 1.4 ~1.5.This article provides a method for the consideration of long-span spatial structure in design.

关 键 词：大跨度空间结构 多维地震 时程分析 行波效应 

分 类 号：TU393.3[建筑科学—结构工程]