青岛邮轮母港客运中心钢屋盖考虑行波效应的地震反应分析

Seismic response analysis considering wave passage effect for the steel roof of Qingdao Cruising Ferry Passenger Transportation Center

青岛邮轮母港钢屋盖采用变截面空间桁架结构,纵向长度为325m,为超限结构.以青岛邮轮母港钢屋盖为研究背景,通过SAP2000分析软件,基于大质量法对结构进行了多遇地震下多点激励时程分析,并与一致激励时程分析法和振型分解反应谱法进行了对比,结果表明:在水平地震作用下,考虑行波效应的多点激励得到的构件内力值大于振型分解反应谱法和一致激励时程分析法所得内力值,尤其是采用多点激励时程分析方法下得到的中间榀的构件内力响应值,大于采用振型分解反应谱法所得的响应值,平均幅值差49%;大于采用一致激励时程分析法所得的响应值,平均幅值差33%.结构设计内力组合时选用了多点激励时程分析所得构件内力值.

The variable cross sections are used in the space truss structure of steel roof in Qingdao Cruising Ferry.The longitudinal length is 325 meters,which was the overrun structure.Based on the steel roof,the large mass method is adopted for frequent earthquake action of the structure under multipoint excitation time history analysis and the uniform excitation time history analysis through the analysis software SAP2000.Moreover,the analysis is done in the mode-superposition response spectrum method.Furthermore,the results are compared.The results show that under horizontal seismic,the internal force of considering wave passage effect is greater than that in the mode-superposition response spectrum method,and greater than that in the uniform excitation time history analysis method.Especially,the internal force of the middle span in the multipoint excitation analysis method is averagely greater than that in the mode-superposition response spectrum method 49%,and averagely greater than that in the uniform excitation time history analysis 33%.The internal force of the multipoint excitation time history analysis method is chosen for internal force combination.