高台基木结构在交通载荷作用下的振动响应研究
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摘要
以西安钟楼为研究背景,建立了钟楼-土层-隧道结构三者共同作用的三维有限元模型,通过动力有限元分析得到了模拟地铁列车载荷作用下钟楼的振动响应规律;根据现场全天候监测,得到了钟楼在地面交通载荷作用下的振动响应;在此基础上,利用SRSS方法将二者进行叠加,从而得到了钟楼木结构在地面和地下交通载荷共同作用下的动力响应,并根据规范对其进行了评估,所得结论为今后相近古建筑在交通振动载荷作用下的响应分析及评估提供了参考依据.
The timber structure with high-platform foundation is the main form of historic buildings in China, such as bell tower and drum tower.Taking Xi'an Bell Tower as an example,a three-dimensional finite element model of the bell tower-soil-tunnel structure interaction is built,and the dynamic response of the bell tower under simulated metro-induced loading is obtained by means of dynamic finite element analysis.The vibration response of the bell tower under ground traffic loads were obtained through all-weather field monitoring.These two results are combined by using the SRSS method to obtain the response of the timber structure of the bell tower under combined action of ground and underground traffic loadings.The structure may be evaluated according to the technical specifications,the results may serve as a reference for dynamic response analysis and assessment of similar historic buildings under traffic loads.
The timber structure with high-platform foundation is the main form of historic buildings in China, such as bell tower and drum tower.Taking Xi'an Bell Tower as an example,a three-dimensional finite element model of the bell tower-soil-tunnel structure interaction is built,and the dynamic response of the bell tower under simulated metro-induced loading is obtained by means of dynamic finite element analysis.The vibration response of the bell tower under ground traffic loads were obtained through all-weather field monitoring.These two results are combined by using the SRSS method to obtain the response of the timber structure of the bell tower under combined action of ground and underground traffic loadings.The structure may be evaluated according to the technical specifications,the results may serve as a reference for dynamic response analysis and assessment of similar historic buildings under traffic loads.
引文
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8 Forrest JA.Modeling of ground vibration from underground railways.[PhD Thesis].Cambridge:Cambridge University,1999
2孟昭博.西安钟楼的交通振动响应分析与评估.[博士论文].西安:西安建筑科技大学.2009(Meng Zhaobo.Analvsis and assessment of the vibration responds traffic-induced of Xi'an Bell Tower.[PhD Thesis].Xi'an:Xi'an University of Architecture and Technology,2009(in Chinese))
3王鑫.地铁项目建设对古建筑影响的有限元分析.[硕士论文].西安:西安建筑科技大学,2008(Wang Xin.The FEM analysis of influence of subway project construction on the ancient buildings.[Master Thesis].Xi'an:Xi'an University of Architecture and Technology,2008(in Chinese))
4陈平,姚谦峰等.西安钟楼抗震能力分析.西安建筑科技大学学报,1998,30(3):227-280(Chen Ping,Yao Qianfeng,et al. An analysis on the aseismic behavior of Xi'an Bell Tower. Journal of Xi'an University of Architecture & Technology, 1998,30(3):227-280(in Chinese))
5城市区域环境振动测量方法(GB10071-88).中国建筑工业出版社,2002(Measurement method of environmental vibration of urban area(GB10071-88).China Architecture & Building Press,2002(in Chinese))
6古建筑防工业振动技术规范(GB/T50452-2008).中国建筑工业出版社,2009(Technical specifications for protection of historic buildings against man-made vibration (GB/T50452-2008).China Architecture & Building Press, 2009(in Chinese))
7 Mroueh H,Shahrour I.A full 3-D finite element analysis of tunneling-adjacent structures interaction.Computers and Geoteehnies,2003,30:245-253
8 Forrest JA.Modeling of ground vibration from underground railways.[PhD Thesis].Cambridge:Cambridge University,1999
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