摘要
分析了国内外典型地震的共振震害个例。论述了致灾的长周期和大振幅地震波形成规律：①地震波周期随震级和震中距而增大；②长周期波出现与地基类型有关，软弱地基能传递长周期地震波，地基越软弱，越厚所能传递的波周期越长；③松软地基对地震波起放大作用，特别是表层松软、下层坚硬的地基，放大作用更显著，对高大建筑物危害更大。提出了减轻共振震害的对策。随着经济发展，高大建筑和结构物越来越多，潜在震害日益加重，研究共振震害对防震减灾具有现实意义。
The examples of typical resonace earthquake damage of high large construction in China and foreign are analysed. The formative laws of long period and large amplitude seismic wave are proposed:(1) The seismic wave period increases with magnitude and epicentre distance. (2) long period seismic wave occurrence is related to foundation sort. The soft soil foundation can propagate long period seismic wave. The softer and the thicker foundation, the longer period of seismic wave is. (3) The soft foundation can magnify seismic wave, specially a soft one of what superlayer is soft, underlayer hard has more great magnification, which has severe hazard for the high large construction. Finally, countermeasures are proposed to reduce the resonance earthquake damage.
出处
《地震学刊》
CSCD
1999年第2期35-44,共10页
Journal of Seismology
关键词
高层建筑
地震波
共振
灾害
地震灾害
high large construction seismic wave resonance disaster
