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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (10): 1955-1961    DOI: 10.3785/j.issn.1008-973X.2010.10.019
岩土工程、土木及建筑工程     
地铁车站结构近远场地震反应特性振动台试验
陈国兴1, 左熹1, 王志华1, 杜修力2, 孙田1
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 建筑工程学院,北京 100022
Shaking table model test of subway station structure under
far field and near field ground motion
CHEN Guo-xing1, ZUO Xi1, WANG Zhi-hua1, DU Xiu-li2, SUN Tian1
1. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China;
2. College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100022, China
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摘要：

以南京某地铁车站为研究背景,考虑近、远场地震动作用,研究可液化场地上三跨三层地铁车站结构大型振动台模型试验中存在的问题和解决方法,包括柔性模型箱、动态数据采集系统的研制和结构模型、地基土相似准则的确定.测试地铁车站结构的加速度、水平位移、应变反应和地基土孔隙水压力、加速度、震陷及作用于侧墙的动土压力反应.结果表明：在近、远场地震动作用下地基土呈现低频放大现象,由于近、远场地震动的频谱特性不同,放大效应的程度和频率范围差异较大；在远场强地震动作用下地表浅层土的基频与远场地震动的主频接近,地表浅层土的地震动放大效应显著；地下结构的存在显著影响周边土体的地震动特性.
Abstract:

A model structure of threestory and threespan subway station at liquefiable ground was analyzed considering the far field and the near field ground motion based on a metro station in Nanjing. Problems existed in the largescale shaking table model test were discussed and the relevant solutions were proposed, which included the development of flexible box and dynamic data acquisition system, as well as the determination of structure and soil’s similarity criterion. Parameters such as acceleration, horizontal displacement, strain response of the station, and the pore water pressure, acceleration, seismic subsidence of soil and dynamic soil pressure on the sidewall were measured. Results show that the soil under near field and far field ground motion presents an amplification phenomenon with low frequency. However, the degree of amplification effect and the frequency range appear to be a great difference for the distinction of spectrum characteristics between near field and far field. The fundamental frequency of shallow soil is close to the dominant frequency of the motion when it comes to the far field motion; the soil’s amplification effect seems to be significant. The existence of the underground structure has remarkable influence on the seismic dynamic characteristics of adjacent soil.
出版日期: 2010-10-01
:     
基金资助:

国家自然科学基金资助项目(90715018, 90715035)；国家公益性行业科研专项资助项目(200808022)；江苏省高校自然科学重大基础研究资助项目(08KJA560001).
作者简介: 陈国兴(1963—), 男, 浙江新昌人，教授, 从事土动力学与岩土地震工程研究。Email: gxchen@njut.edu.cn
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引用本文:

陈国兴, 左熹, 王志华, 杜修力, 孙田. 地铁车站结构近远场地震反应特性振动台试验[J]. J4, 2010, 44(10): 1955-1961.

CHEN Guo-Xin, ZUO Xi, WANG Zhi-Hua, DU Xiu-Li, SUN Tian. Shaking table model test of subway station structure under
far field and near field ground motion. J4, 2010, 44(10): 1955-1961.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2010.10.019    或    http://www.zjujournals.com/eng/CN/Y2010/V44/I10/1955

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