土-地铁车站结构动力相互作用大型振动台模型试验研究  

Analysis of large-scale shaking table test of dynamic soil-subway station interaction

作　　者：陈国兴[1] 庄海洋[1] 杜修力[2] 李亮[2] 程绍革[3] 

机构地区：[1]南京工业大学岩土工程研究所,江苏南京210009 [2]北京工业大学建工学院,北京100022 [3]中国建筑科学研究院工程抗震所,北京100013

出　　处：《地震工程与工程振动》2007年第2期171-176,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50578076;50508002);江苏省自然科学基金项目(BK2004124);江苏省六大人才高峰项目(06-F-008);南京工业大学博士创新基金项目(BSCX200515)

摘　　要：以南京地铁为背景,开展了深厚软弱场地土-地铁地下结构动力相互作用的大型振动台模型试验研究。在试验中获得的主要数据有:模型体系的加速度反应时程、模型结构的应力反应时程和结构表面的土压力时程等。本文对试验反映的地铁车站结构的动力反应规律及其周围模型地基的地震反应规律进行了分析。结果表明:车站结构的中柱应变反应明显大于别的构件,同时,深厚软弱地基上车站结构侧墙底部的应变反应也明显大于侧墙顶部的反应,其中,车站结构顶板、中间层楼板和底板的应变反应都很小;输入地震动的频谱特性对车站结构应变反应的影响是不同的,在同一加载情况下,在台面输入傅氏谱频宽最大的南京人工波时车站结构应变反应最大。Based on the background of metro construction in Nanjing city, a large-scale shaking table test is accomplished to model the dynamic soil-metro structure interaction with liquefiable soils included in site. During the test, the acceleration response of model site and subway station, the dynamic soil pressure of structure and the strain response of subway station are investigated. It proves that the strain responses of columns are greater than those of other components. At the same time, the strain responses of structure at the bottom of side walls are greater than those at the top of them. However, the strain responses of horizontal plates are correspondingly smaller. The frequency characteristic of inputted earthquake wave has obvious effect on the earthquake response of subway station. For the same peak value acceleration used, the earthquake response of subway station is strongest when the Nanjing artificial wave is inputted, which has the biggest frequency band among three earthquake waves used.

关 键 词：地铁车站 动力相互作用 大型振动台试验 动力反应 

分 类 号：P315.97[天文地球—地震学]