黄土地区地铁车站地震反应的频域分析及空间效应

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摘要在黄土场地与地铁地下结构动力相互作用振动台试验中，测得模型地基及地铁车站的加速度反应及应变反应。基于实测数据对模型地基、地铁车站的加速度反应进行了频域分析，对比不同观测断面内地铁车站的地震反应，分析地铁车站加速度反应的空间效应。结果表明：随输入峰值加速度增加，模型体系加速度反应傅里叶谱基频减小，相应谱值增大；随埋深减小地基加速度反应傅里叶谱低频成分增大，高频成分减小，且增大部分频带宽度随输入峰值加速度增加而缩小；随输入峰值加速度增加，结构加速度反应傅里叶谱主频集中、变窄，高频成分呈现增强效应；模型体系加速度反应傅里叶谱主频带宽呈现出松潘波作用时较宽，西安人工波作用时居中，Taft波作用时较窄；受结构端头效应及土结相互作用中倾斜与扭转影响，地铁车站地震反应具有显著的空间效应。研究结论可为黄土地区地铁地下结构的抗震设计及相关理论研究提供重要参考。

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	权登州 1
	王毅红 1
	马蓬渤 1
	井彦林 1
	陈苏 2

关键词 ：黄土地区, 地铁车站, 振动台试验, 加速度反应, 频域分析, 空间效应

Abstract：

The shaking table test of underground subway station in loess ground was performed, the acceleration and strain response of soil and structure were measured in the test. The frequency domain analysis on acceleration response of model system was conducted, and the spatial effect of seismic response of station was revealed by comparison the data of different observation sections. The results show that the fundamental frequencies of model system decreases with the increase of PGA, meanwhile, the amplitude of Fourier spectrum increases with the increase of PGA. The Fourier spectrum values of accelerations are increased at low-frequency components and decreased at high-frequency component form bottom to top of soil, and the bandwidth of low-frequency component is reduced with the increase of PGA. The Fourier spectrum values of accelerations in station are increased at high-frequency component and the main band of the spectrum is concentrated and narrower with the increase of PGA. The main band of Fourier spectrum of accelerations of model system is widest under Songpan wave, medium under Xi’an artificial wave and narrowest under Taft wave. Meanwhile, the spatial effect of seismic response in station is obvious because of end effect and torsion of station. The results could provide references for aseismic design and theoretical research of underground structures in loess area.

Key words： loess area subway station shaking table test acceleration response frequency domain analysis spatial effect

收稿日期: 2015-09-09 出版日期: 2016-10-25

引用本文:

权登州 1，王毅红 1，马蓬渤 1，井彦林 1，陈苏 2. 黄土地区地铁车站地震反应的频域分析及空间效应[J]. 振动与冲击, 2016, 35(21): 102-112.
QUAN Deng-zhou1, WANG Yi-hong1, Ma Peng-bo1, JING Yan-lin1, CHEN Su2. Spatial effect and frequency analysis on seismic response of subway station in loess ground. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(21): 102-112.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2016/V35/I21/102

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