错位转换高层建筑结构水平地震作用下的扭转反应研究

Torsional response of high-rise building with stagger transfer structure during horizontal earthquake

根据中国规范设计了一总层数为40层的错位转换高层建筑结构,为对比分析需要另设计具有相同楼层数的两带单层转换高层建筑结构。采用Etabs和Satwe对比分析了三结构在水平地震作用下的相对位移比、层间位移比沿楼层分布情况;其相对扭转角、层间扭转角、层间有害扭转角的分布特点;顶层角点扭转位移轨迹。研究分析表明,错位转换高层结构的扭转反应远大于同类带单层转换高层结构的反应;对单层转换结构采用位移比不能很好反映其扭转反应,而结构扭转位移角沿楼层分布规律更能体现其扭转反应特征。

A 40-story high-rise building with stagger transfer structure has been designed according to Chinese Code, two other high-rise buildings with one transfer story have also been designed in need of comparison. The Etabs and Satwe programs are used. The ratio between the maximum displacement and the mean one in each story, and the ratio between the maximum story drift and the mean one in each story of the abovementioned three models are analyzed and compared. The relative torsional angle, the interstory torsional angle and the harmful interstory torsional angle are compared. The displacement track of the point at the corner of thetop story is also analyzed. The research results show that the torsional response of the high-rise building With stagger transfer structure is greater than that of the high-rise building with one transfer story ; the ratio of displacement can＇ t reflect the torsional response characteristic of this kind of structure, the interstory torsional angle is better than the ratio of displacement in reflecting that of this kind of structure.