地震作用下环带对带伸臂的框-筒结构力学性能的影响

对一60层的框架核心简结构通过改变水平伸臂、环带构件的设置情况而形成不同的结构方案，采用三维有限元分析软件ETABS进行地震作用下的动力分析，探讨地震作用下水平伸臂以及不同刚度环带对结构顶点侧移、核心筒剪力、外框柱轴力的影响。分析表明：环带的设置、环带本身的刚度对地震作用下高层框架一核心筒结构的顶点侧移影响不大；但环带能有效调整外框柱的轴力分布，更好的发挥外框柱的整体作用；环带的设置会加大水平加强层的剪力突变这一现象。

INFLUENCE OF BELTS ON THE MECHANICS BEHAVIOR OF FRAMED-TUBE STRUCTURE WITH OUTRIGGER UNDER HORIZONTAL SEISMIC

The thesis conducts a space dynamic analysis on a 60 - storey framed - tube structure that has different belt and outrigger plans under horizontal seismic by ETABS. The influnces of peak sidesway ,shears of core wall and axial forces of outside frame columns effectd by the belt were studied. The analysis indicates that under horizontal seismic, the institution and rigidity of belt has few influncc on peak sidesway of high-rise frame-core wall structure, but effectively adjusts distribution of axial forces of outside frame columns, and further displays integrated performances of outside columns. The analysis also indicates that disadvantageous effects of shearing mutation are increased on the strengthened storey with belt.