基于Pushover分析的RC框架刚度调整方法探讨

Discussing on the Rigid Adjusting of the RC Frame Based on the Pushover Analysis Method

在地震作用下,偏心结构的扭转响应会使结构产生严重的破坏甚至倒塌。工程设计往往采用合理布置结构及构件的方法,使各楼层质心与刚心尽可能地重合,从而减小偏心结构的扭转地震响应。本文研究了影响多层偏心框架结构的地震响应因素,并利用基于Pushover分析的刚度调整算法对多层偏心框架结构的楼层平面刚度进行了调整。刚度调整后,结构各榀框架的地震位移时程反应基本一致。调整后的结构符合"强柱弱梁"的抗震设计需求,从而提高了结构的抗震性能。

Under the action of earthquake, the eccentric structures will be severed serious damage or collapse for the reason of the torsional response of the structures. In order to reduce the torsional response, the method of reasonable arrangement of structure and component is widely used during the engineering design, so that the quality center and the rigid center in each floor as much as possible coincidence. The factors which influence the seismic response of muhi-frame eccentric structure is studied in this paper. The floor＇ s plane rigid of multi-frame eccentric structure are adjusted using the rigid adjusting algorithm based on the pushover analysis method, and the seismic displacement time history of each frame are nearly the same. The adjustment leads to the strong column weak beam design that improve the seismic performance.