不规则高层建筑非对称设置支撑的抗震性能分析

Anti-seismic analysis of irregular high-rise building

对比分析了一个不规则高层钢筋混凝土框—剪结构和在原结构上非对称设置支撑(单斜杆偏心支撑)后的新结构的抗震性能,比较了它们的自振特性、层间位移、典型构件的内力以及结构在地震作用下的扭转振动情况。结合在高层钢结构中的应用,提出了在不规则高层钢筋混凝土结构中适当地增设支撑,来减小这类结构在地震作用下难以避免的扭转振动效应是一种简单可行、经济适用的方法。

An anti-seismic analysis of two structures （an irregular high-rise RC building and the previous structure which is set eccentrically braces in） is studied in this paper. Their self-vibration characters, displacement between adjacent floors, internal force of typical members and torsional vibration response in earthquake are compared. It is found that adding some eccentrically braces properly in irregular high-rise RC buildings can reduce the response of torsional vibration and other seismic responses of the structures effectively. The example mentioned in the paper proves that this method is a simple and economical one.