带水平加强层的框架-筒体结构受力机理分析

摘要

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.%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.