摘要
青岛北站主站房屋盖结构平面尺寸非常大,受力情况十分复杂,进行多点多维分析十分必要。首先介绍了多点多维输入地震反应分析的基本原理,采用时程分析法对青岛北站结构进行多点多维输入下的地震响应分析,并与一致输入下的结构响应进行了对比,考察了两种输入方法下结构扭转效应和内力变化的特点,并进行了对比分析。最后得到结论:多点多维输入下结构的扭转效应较一致输入下有明显的增大趋势,该趋势对结构的安全性产生一定的影响,但是相对扭转角没有增大多少;不同角度的输入条件下,结构的扭转效应也不一样,对于青岛北站主站房屋盖来说,45°方向输入时响应最大,0°方向输入时响应最小;拱构件在多点激励和一致激励作用下的响应各不相同,有的响应增大,有的响应减小。
The main station roof of the Qingdao North Railway Station has large planar size and complicated stress distribution,which make it necessary to conduct multi-support and multi-dimension dynamic response analysis.The basic principle of multi-support and multi-dimension dynamic response analysis was introduced firstly.Then seismic response analysis of the main station roof of the Qingdao North Railway Station was carried out using time-history analysis method under multi-support and multi-dimension input,and results were compared with those of structure response under the uniform input.After that,the characteristics of torsional effect and internal force changes under two different input methods were compared.Results show that in the condition of multi-support and multi-dimension input,the torsional effect increase significantly compared with the uniform input,which make a certain influence to the safety of the structure but the relative torsion angle increase little.In the condition of different input angle,the torsional effect of the main station roof is different that the response is the largest under 45° input angle and smallest under 0° input angle.The arch structure responses differently under multi-support excitation and uniform excitation,and the responses of some arch structures increase and the responses of some arch structures decrease.
出处
《建筑结构》
CSCD
北大核心
2013年第23期14-16,29,共4页
Building Structure
关键词
多点多维输入
一致输入
立体拱架
地震响应
时程分析法
muhi-support and multi-dimension input
uniform input
three-dimensional arch
seismic response
time-history analysis method
