不同地震动作用下高层结构响应比较研究

A COMPARATIVE STUDY ON HIGH-RISE STRUCTURES RESPONSE UNDER DIFFERENT GROUND MOTIONS

近年的大地震中,远离震中的高层建筑在长周期地震动作用下响应强烈。研究以高层钢筋混凝土结构为对象,选取不同频谱特征的地震波,分别以加速度标准化和速度标准化两种方式调幅进行弹塑性时程分析。结果表明:加速度峰值相同的条件下,长周期地震动对高层结构影响更大,且结构响应受位移控制,速度和能量与高层结构的地震响应关系密切。

In the recent strong earthquakes,the high-rise buildings distanced from the epicenter respond much stronger than other buildings during the long period ground motion. This study takes the high rise reinforced concrete frame structure as the research object,by choosing earthquake ground motions with different spectral characteristics,elastic-plastic time history analysis is conducted in acceleration standardization and velocity standardization respectively. The result shows that under the same peak acceleration,high-rise structure response is larger under the long period ground motion. The response of high-rise structures is controlled by the velocity and energy of the ground motion.