摘要
考虑土—结构相互作用影响,分析在不同的地震波作用下不同结构形式地铁车站对临近场地地震动响应的影响规律。经过两次反演得到地铁车站所在深度的EL-Centro波,将此波形与生成的人工波分别作用于自由场地与包含地铁车站的两种地层结构,将得到的场地反应谱特性与自由场地表反应谱进行对比。由对比结果可知:在短周期部分地铁车站的存在使得地表加速度反应谱谱值变大,而在长周期部分,地表加速度反应谱谱值变化相对而言较小,即地铁车站的存在对地表加速度反应谱的长周期部分基本不影响;在不同地震波作用下,不同地铁车站结构对临近场地土反应谱的变化影响度因子曲线均呈倒"S"型,有唯一拐点;地铁车站结构的跨度与高度越大,其对周围场地土反应谱带来的影响越大。
Considering the influence of soil structure interaction, the ground motion responsein different seismic waves and different structure influence of subway station was analysed. And the influence of surface acceleration was determined by the frequency spectrum characteristics of the input seismic waves.Compared to in El-Centro wave and artificial wave respectively under the action, and the free field surface reaction spectrum, in a short period, some subway station made of ground surface acceleration response spectrum value becomes larger,and in the long period, the surface acceleration response spectrum value were almost same. Under the different seismic waves and different structure of subway station near the ground response spectrum changes influence degree coefficient curve was inverted ＂S＂ type, with only a turning point; and the larger the span and height , the more influencewhich structure of surrounding soil to site response spectrum.
出处
《防灾减灾学报》
2017年第3期43-48,共6页
Journal of Disaster Prevention And Reduction
基金
铁道部科技研究开发项目(2012G014-D)
河北省高等学校科学研究项目(ZH2012037)
关键词
土-结构相互原理
反应谱
动力响应
频谱特性
soil structure interaction
response spectrum
dynamic response
spectral characteristics
