多点多维输入下青岛北站主站房屋盖扭转效应分析
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(北京市建筑设计研究院有限公司， 北京 100045)［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。［关键词］多点多维输入; 一致输入; 立体拱架; 地震响应; 时程分析法中图分类号：TU311.3 文献标识码：A 文章编号：1002-848X(2013)23-0014-03Torsional effect analysis of main station roof of Qingdao North Railway Station under multi-support and multi-dimension dynamic inputZhang Xiangyong（Beijing Institute of Architectural Design, Beijing 100045, China）Abstract: 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 multidimension 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.Keywords: multi-support and multi-dimension input; uniform input; three-dimensional arch; seismic response; time-history analysis method作者简介：张相勇，博士，高级工程师，一级注册结构工程师，注册咨询工程师（投资），Email：yongzx@126.com。参考文献［1］张相勇,李黎明,魏建友，等. 青岛北站结构设计综述［J］.建筑结构,2013，43（23）：1-6,13.［2］李国强,沈祖炎. 上海浦东国际机场R2钢屋盖模型模拟三向地震振动台试验研究［J］.建筑结构学报,1999, 20(2):18-27.［3］白学丽,叶继红.大跨空间网格结构在多点多维输入下的简化计算方法［J］.空间结构,2008，14（2）:30-33.［4］陈海忠,朱宏平,蔡振，等.多点多维地震作用下某体育馆的动力响应分析［J］.华中科技大学学报：城市科学版，2009,26(2):12-14.［5］张相勇. 建筑钢结构设计方法与实例解析［M］. 北京:中国建筑工业出版社, 2013.［6］张相勇,李黎明,甘明. 青岛北站主站房屋盖钢结构设计［J］.建筑结构,2013，43（23）：7-13.
