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.
作者
姜亚雄
Jiang Yaxiong(CCCC Second Harbor Consultants Co.,Ltd.,Wuhan Hubei 430060,China)
出处
《港工技术》
2022年第1期40-44,共5页
Port Engineering Technology
关键词
大跨度空间结构
多维地震
时程分析
行波效应
long-span spatial structure
multi-component earthquake
time-history analysis
traveling wave effect
