带水平加强层的框架-筒体结构受力机理分析
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摘要
水平加强层能够有效地减小高层框架-筒体结构在水平荷载作用下的侧向位移,但加强层的设置能引起结构竖向刚度的突变和结构内力的重分布。通过对四种不同加强层设置情况的框架-筒体结构进行详细的计算与分析,研究水平加强层在改善结构受力状态、减少结构侧移、提高结构整体抗侧刚度的作用机理,为高层框架-筒体结构的设计提供了相关建议。
Horizontal strengthened stories can effectively reduce the lateral displacement of the high-rise tubular structures under lateral load.But the high-rise tubular structures with horizontal strengthened stories displayed the extremely complex response characteristic under the earthquake action,the setting of horizontal strengthened stories can not only cause the mutation of vertical stiffness,and the redistribution of the structural internal force,but also easily form weak stories nearby the horizontal strengthened stories.Based on discussion on several examples,the mechanical mechanism that the horizontal strengthened stories reduce structural lateral displacement is analyzed,and internal force redistribution phenomenon which is caused by the establishment of horizontal strengthened stories is discussed.Corresponding design measures to ensure the deformability of the structure under rare earthquake action are put forward.
Horizontal strengthened stories can effectively reduce the lateral displacement of the high-rise tubular structures under lateral load.But the high-rise tubular structures with horizontal strengthened stories displayed the extremely complex response characteristic under the earthquake action,the setting of horizontal strengthened stories can not only cause the mutation of vertical stiffness,and the redistribution of the structural internal force,but also easily form weak stories nearby the horizontal strengthened stories.Based on discussion on several examples,the mechanical mechanism that the horizontal strengthened stories reduce structural lateral displacement is analyzed,and internal force redistribution phenomenon which is caused by the establishment of horizontal strengthened stories is discussed.Corresponding design measures to ensure the deformability of the structure under rare earthquake action are put forward.
引文
[1]徐培福,傅学怡,等.复杂高层建筑结构设计[M].北京:中国建筑工业出版社,2005.
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[3]朱杰江,宋健,王颖.带加强层框架-芯筒结构的优化研究[J].南京建筑工程学院学报,2001(3):26-31.
[4]陈林之,李章政.水平加强层对筒中筒结构空间受力性能的影响[J].工业建筑,2005,35(10):23-25.
[5]李元初.带水平加强层的高层筒体结构分析[D].重庆:重庆大学,2008.
[2]易方民,高小旺,张维嶽.水平加强层在超高层钢结构中的应用研究[J].地震工程与工程振动,2001,17(1):15-20.
[3]朱杰江,宋健,王颖.带加强层框架-芯筒结构的优化研究[J].南京建筑工程学院学报,2001(3):26-31.
[4]陈林之,李章政.水平加强层对筒中筒结构空间受力性能的影响[J].工业建筑,2005,35(10):23-25.
[5]李元初.带水平加强层的高层筒体结构分析[D].重庆:重庆大学,2008.
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