城市轨道交通微幅振动对西安南城墙的影响分析
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摘要
为了评估轨道交通微幅振动对文化遗址的影响,进一步保护古建筑,本文以西安地铁二号线为工程背景,以南门区段古城墙为研究对象,通过建立"基础土层一上部结构"三维空间有限元计算模型,分析了地铁列车振动荷载的数定形式,应用瞬态分析对西安地铁二号线列车振动引起的西安南城墙的动力响应进行了分析。研究了城墙在不同的地铁列车时速作用下、单向隧道地铁和双向隧道地铁振动时的动力特性以及振动衰减规律,分析了具有最不利影响的列车运行状况,为城墙的保护提供依据。
In this paper,we take Xi′an metro train line as an engineering background and the ancient city walls of South Gate section as a research objective to discuss the vibration effect of metro train on the walls by using three-dimensional finite element model of city walls and soil.We introduce the metro line project and the present condition of Xi'an city wall,and point out the significance of protecting ancient city walls.Meanwhile,we calculate the dynamic parameters of wall material,and introduce the related dynamic equations and solution method.For establishing the finite element model of the wall,the range of model,and artificial boundaries are discussed.We analyze the response of models and contrast the most adverse vibration velocity and related specifications to provide the reference for protection of the city walls.
In this paper,we take Xi′an metro train line as an engineering background and the ancient city walls of South Gate section as a research objective to discuss the vibration effect of metro train on the walls by using three-dimensional finite element model of city walls and soil.We introduce the metro line project and the present condition of Xi'an city wall,and point out the significance of protecting ancient city walls.Meanwhile,we calculate the dynamic parameters of wall material,and introduce the related dynamic equations and solution method.For establishing the finite element model of the wall,the range of model,and artificial boundaries are discussed.We analyze the response of models and contrast the most adverse vibration velocity and related specifications to provide the reference for protection of the city walls.
引文
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[2]陈爱侠,董小林.城市地铁项目建设对古建筑的影响[J].建筑科学与工程学报,2007,24(1):80-84.CHEN Aixia,DONG Xiaolin.Influence of urban subway project construction on heritage Buildings[J].Journal of Architecture and Civil Engineer-ing,2007,24(1):80-84.(in Chinese)
[3]李俊连,郑建国,李忠明.西安城墙地铁二号线穿越区段现状勘察简介[J].工程勘察,2008(1):114-120.LI Junlian,ZHENG Jianguo,LI Zhongming.The geotechnical investigation and surveying of the Xi’an City Wall[J].Journal of Geotechnical Inves-tigation and Surveying,2008(1):114-120.(in Chinese)
[4]俞茂宏,张学彬.西安古城墙研究建筑结构与抗震[M].西安:西安交通大学出版社,1994.YU Maohong,ZHANG Xuebin.The structures and seismic of the Xi’an Ancient City Wall[M].Xi’an:Xi’an Jiaotong University Press,1994.(inChinese)
[5]王兰民.黄土动力学[M].北京;地震出版社,2003.WANG Lanmin.Loess dynamics[M].Beijing:Earthquake Press,2003.(in Chinese)
[6]潘昌实,Pande G N.黄土隧道列车动荷载响应有限元初步数定分析研究[J].土木工程学报,1984,17(4):19-29.PAN Changshi,Pande试G N.Preliminary deterministic finite element study on a tunnel driven in loess subjected to train loading[J].China CivilEngineering Journal,1984,17(4):19-29.(in Chinese)
[7]王鑫,刘增荣,李云璋.基于土与结构相互作用的隧道结构振动特性的理论研究[J].地震工程与工程振动,2010,30(5):142-149.WANG Xin,LIU Zengrong,LI Yunzhang.Study on vibration characteristics of tunnel structure based on soil-structure interaction[J].Journal ofEarthquake Engineering and Engineering Vibration,2010,30(5):142-149.(in Chinese)
[8]高大峰,曹鹏男,丁新建.中国古建筑简化分析研究[J].地震工程与工程振动,2011,31(2),175-181.GAO Dafeng,CAO Pengnan,DING Xinjian.Simplified analytical reresearch on ancient Chinese timber structures[J].Journal of Earthquake Engi-neering and Engineering Vibration,2011,31(2):175-181.(in Chinese)
[9]赵鸿铁,马辉,薛建阳,等.高台基古建筑木结构动力特性及地震反应分析[J].地震工程与工程振动,2011,31(3):115-121.ZHAO Hongtie,MA Hui,XUE Jianyang,et al.Analysis of dynam ic characteristics and seismic responses of the ancient timber building on high-platform base[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(3):115-121.(in Chinese)
[10]裴强,陶夏新.轨道交通振动对邻近建筑物的影响及其评价[J].地震工程与工程振动,2011,31(4):77-83.PEI Qiang,TAO Xiaxin.Effect of vibration from rail traffic on nearby buildings and its assessment[J].Journal of Earthquake Engineering and En-gineering Vibration,2011,31(4):77-83.(in Chinese)
[11]刘雪珠,陈国兴,储勇.列车引起的地基土应力状态变化的三维有限元分析[J].地震工程与工程振动,2010,30(2):159-166.LIU Xuezhu,CHEN Guoxing,CHU Yong.Stress states of soil elements induced by train passage on the basis of 3D finite element analysis[J].Journal of Earthquake Engineering and Engineering Vibration,2010,30(2):159-166.(in Chinese)
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