多维地震输入的大跨维修机库结构动力反应分析

• 作 者: 徐小燕 赵均 朱丹 胡颖 冯帆 凌沛春
• 机 构: 北京工业大学建筑工程学院城市与工程安全减灾省部共建教育部重点实验室,中国航空工业规划设计研究院,中广电广播电影电视设计研究院,
• 出 处: 建筑结构
• 发表日期: 2009年S2期
• 关键词: 机库 地震作用 大跨度结构 多维地震反应 时程分析 地震波 顶位 竖向地震作用 抗震设防要求 地震反应

对7度抗震设防要求,Ⅳ类场地条件下的国内某大跨度维修机库进行了多维地震输入下的动力反应时程分析,考虑地震波沿结构单向、双向和三向输入的不同情况,从结构总地震作用、柱顶位移、柱内力等方面进行了比较和分析。研究表明:在多维地震作用下,地震波沿结构坐标轴正向或反向输入导致结构扭转方向不对称;与单向地震作用相比,多维地震作用可使柱的一些内力和位移值增加显著。还通过比较双向和三向输入的反应,研究了竖向地震作用对结构柱列的影响。

Based on the requirements of the seismic fortification degree of 7 degrees and the dynamic response time-history analysis of a large-span maintenance hangar under the condition of Ⅳ site under multi-dimensional seismic input, considering the different situations of the seismic waves along the structure of one-way, two-way and three- The general seismic action of structure, the displacement at the top of the column, the internal force of column and so on are compared and analyzed. The results show that under the action of multi-dimensional earthquake, the input of seismic wave along the structural axis in the positive or negative direction leads to the asymmetry of the structure’s torsional direction. Compared with the unidirectional earthquake, the multi-dimensional seismic action can increase some internal forces and displacements of the column remarkably. The effect of vertical seismic action on the column of structure was also studied by comparing the response of two-way and three-way input.