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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。
Qingdao North Station main station house cover structure plane size is very large, the force situation is very complex, multi-point multi-dimensional analysis is necessary. Firstly, the basic principle of multi-point and multi-dimensional seismic response analysis is introduced. The seismic response analysis of Qingdao North Station structure under multi-point and multi-dimension input is carried out by using the time history analysis method, and compared with the structural response under uniform input. Under the input method, the structural torsional effect and internal force change characteristics are analyzed and compared. Finally, it is concluded that the torsional effects of the structure under multi-point and multi-dimensional input have a clear trend of increasing under consistent input. This trend has an impact on the structural safety but does not increase the relative torsional angle. The input conditions at different angles , The torsional effect of the structure is also different. For the main roof of Qingdao North Railway Station, the response is the maximum at 45 ° input and the response at 0 ° input. The response of arch members under multi-point excitation and uniform excitation Different, some respond to increase, and some reduce response.