成都双流国际机场T2航站楼大厅多点多维弹性地震反应分析  

Time-history analysis on the hall structure in Chengdu Shuangliu International Airport T2 Terminal Building under multi-support and multi-dimension seismic excitation

作　　者：周定松[1] 肖克艰[1] 陈志强[1] 

机构地区：[1]中国建筑西南设计研究院有限公司,成都610081

出　　处：《建筑结构》2010年第9期14-19,共6页Building Structure

摘　　要：采用时程分析方法对成都双流国际机场T2航站楼结构进行了多点多维地震反应分析,地震波波速从266m/s变化到533m/s,并与一致输入结果比较可知:考虑行波效应后,钢结构部分的多数杆件内力小于一致输入的,且行波效应影响系数多数小于1.2;沿地震波传播方向上的底层框架柱内力多数增大,而垂直于地震波传播方向上的柱内力多数减小;支承钢拱的钢柱轴力行波效应影响系数基本上小于1;支承钢拱的框架柱列行波效应影响系数呈现出两端大、中间小的规律;多点输入下的基底剪力小于一致输入下的,为多点输入下结构中各构件振动不同步所致,叠加为总地震力时往往相互抵消。Time history seismic analysis considering multi-support and multi-dimension effect for Chengdu Shuangliu Airport T2 Terminal Building was carried out.Travelling wave velocity varied from 266m/s to 533m/s.The results from multi-support and multi-dimension seismic analysis had been compared with the results from single-support and multi-dimension analysis,and the significant differences of these results were shown.It was found that the internal force of steel members became smaller when travelling wave effect was considered.The travelling wave effect coefficients of steel members were almost less than 1.2.The internal force along the seismic wave propagation direction of the first floor RC frame column would increase,but the internal force of the first floor RC frame column which was perpendicular to wave direction would decrease.The travelling wave effect coefficients of the steel columns which support the steel arches were almost less than 1.0.The travelling wave effect coefficients of the side column became bigger from the middle to two sides.Base shear force caused by multi-support excitation was less than that caused by uniform excitation.The reason is that the vibration of structure members is not synchronized when multi-support excitation occurs,so that superposition of the total base shear tends to mutually counterbalance.

关 键 词：航站楼 多点多维 行波效应 时程分析 

分 类 号：TU248.6[建筑科学—建筑设计及理论]