考虑土-结构相互作用的西安钟楼地震反应分析
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摘要
为探讨土-结构相互作用对西安钟楼地震反应的影响,建立了钟楼上部木结构-台基-地基三维有限元模型,基于粘-弹性人工边界条件,利用振型分解反应谱法进行了地震反应分析。结果表明,考虑相互作用木结构2层相对位移反应增大了2.12倍,台基相对于地面间的相对位移增大了44%。因此,在对钟楼结构进行地震反应分析时必须考虑土-结构相互作用。
In order to study the influence of soil-structure interaction on seismic responses of the Xi'an bell tower,3-D finite element model of the Xi'an Bell Tower is established in this paper,which includes timber structure,tower base and foundation.Based on viscous-spring artifical boundaries,seismic response analysis of the Bell Tower are conducted using mode decomposition response spectrum method.The results indicate that relative displacement of the second floor of timber structure is increased by 2.12 times and displacement of tower base relative to ground is increaced by 44% when soil-structure interaction is considered.Therefore,soil-structure interaction should be considered in the seismic response analysis of the Bell Tower.
In order to study the influence of soil-structure interaction on seismic responses of the Xi'an bell tower,3-D finite element model of the Xi'an Bell Tower is established in this paper,which includes timber structure,tower base and foundation.Based on viscous-spring artifical boundaries,seismic response analysis of the Bell Tower are conducted using mode decomposition response spectrum method.The results indicate that relative displacement of the second floor of timber structure is increased by 2.12 times and displacement of tower base relative to ground is increaced by 44% when soil-structure interaction is considered.Therefore,soil-structure interaction should be considered in the seismic response analysis of the Bell Tower.
引文
[1]陈平,姚谦峰,赵冬.西安钟楼抗震能力分析[J].西安建筑科技大学学报:自然科学版,1998,30(3):277-283.
[2]成卜乾.钟楼结构特点及其抗震特性分析[D].西安:西安交通大学,1986.
[3]俞茂宏,张学彬,方东平.西安城墙研究-建筑结构和抗震[M].西安:西安交通大学出版社,1993.
[4]Meng Z B,Hu W B,Wu MZ.Seismic responses analysis of historic building based on soil-structure interaction[R].The 10th International Sym-posium on Structural Engineering for Young Experts.Changsha,Hunan,P.R.China.2008:998-1005.
[5]方东平,俞茂宏,宫本裕,等.木结构古建筑结构特性的计算研究[J].工程力学,2001,18(1):137-144.
[6]翟慧娟.西安东门城楼、城门弹塑性有限元研究[D].西安:长安大学,2005.
[7]吴体,熊峰,王永维.土-结构相互作用体系自振频率计算模型[J].四川建筑科学研究,2006,32(4):95-99.
[8]邓晓红,申爱国.土-结构相互作用中人工边界的影响[J].四川建筑,2006,26(6):86-89.
[9]西安钟楼工程地质勘察报告[R].西安,机械工业勘察设计研究院,1985.
[10]刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):46-51.
[11]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]GB50003-2001,砌体结构设计规范[S].北京:中国建筑工业出版社,2001.
[2]成卜乾.钟楼结构特点及其抗震特性分析[D].西安:西安交通大学,1986.
[3]俞茂宏,张学彬,方东平.西安城墙研究-建筑结构和抗震[M].西安:西安交通大学出版社,1993.
[4]Meng Z B,Hu W B,Wu MZ.Seismic responses analysis of historic building based on soil-structure interaction[R].The 10th International Sym-posium on Structural Engineering for Young Experts.Changsha,Hunan,P.R.China.2008:998-1005.
[5]方东平,俞茂宏,宫本裕,等.木结构古建筑结构特性的计算研究[J].工程力学,2001,18(1):137-144.
[6]翟慧娟.西安东门城楼、城门弹塑性有限元研究[D].西安:长安大学,2005.
[7]吴体,熊峰,王永维.土-结构相互作用体系自振频率计算模型[J].四川建筑科学研究,2006,32(4):95-99.
[8]邓晓红,申爱国.土-结构相互作用中人工边界的影响[J].四川建筑,2006,26(6):86-89.
[9]西安钟楼工程地质勘察报告[R].西安,机械工业勘察设计研究院,1985.
[10]刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):46-51.
[11]GB50011-2001,建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.
[12]GB50003-2001,砌体结构设计规范[S].北京:中国建筑工业出版社,2001.
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