西北地区典型土遗址抗震安全性分析
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摘要
以我国西北地区全国重点保护文物安西烽燧和河仓城土遗址为实例建立三维有限元模型,计算分析土遗址在地震动荷载作用下的位移场、应力场特征,探讨其动力响应规律,揭示不同类型土遗址的地震破坏机理。结果表明,土遗址现有病害是抗震薄弱环节,在遭受7度地震作用下处于局部破坏或整体不稳定状态。旨在为土遗址文物的科学保护和抗震加固与减灾提供理论基础和实践依据。
In this paper,a three-dimensional finite element model is established by the example of Anxi beacon and Hecangcheng earthen archaeological sites,which are the Skanzens in northwest China.Under the seismic load,the displacement field and stress field features of earthen archaeological sites,as well as the regular pattern of dynamic response are calculated and analyzed.Then,the destructive mechanisms of various earthen sites are revealed.The results demonstrate that the existing malady components of earthen archaeological sites are vulnerable when they encounter earthquake,and they tend to gain partial failure or global instability when subjected to the action with 7 degree earthquake.This paper provides basic theoretical and practical reference for the preservation of the earthen archaeological sites,seismic retrofit and seismic hazard mitigation.
In this paper,a three-dimensional finite element model is established by the example of Anxi beacon and Hecangcheng earthen archaeological sites,which are the Skanzens in northwest China.Under the seismic load,the displacement field and stress field features of earthen archaeological sites,as well as the regular pattern of dynamic response are calculated and analyzed.Then,the destructive mechanisms of various earthen sites are revealed.The results demonstrate that the existing malady components of earthen archaeological sites are vulnerable when they encounter earthquake,and they tend to gain partial failure or global instability when subjected to the action with 7 degree earthquake.This paper provides basic theoretical and practical reference for the preservation of the earthen archaeological sites,seismic retrofit and seismic hazard mitigation.
引文
[1]李最雄.丝绸之路古遗址保护[M].北京:科学出版社,2003.
[2]李最雄,赵林毅,孙满利.中国丝绸之路土遗址的病害及PS加固[J].岩石力学与工程学报,2009,28(5):1047-1054.
[3]李最雄,王旭东.古代土建筑遗址保护加固研究的新进展[J].敦煌研究,1997,(4):167-172.
[4]赵海英,李最雄,韩文峰,等.西北干旱区土遗址的主要病害及成因[J].岩石力学与工程学报,2003,22(增2):2875-2880.
[5]孙满利,李最雄,王旭东,等.干旱区土遗址病害的分类研究[J].工程地质学报,2007,15(6):772-778.
[6]刘琨,石玉成,卢育霞,等.玉门关段汉长城墙体结构抗震性能研究[J].世界地震工程,2010,26(1):47-52.
[7]高峰,石玉成,韦凯,等.锚杆加固对石窟地震反应的影响[J].世界地震工程,2006,22(2):84-88.
[2]李最雄,赵林毅,孙满利.中国丝绸之路土遗址的病害及PS加固[J].岩石力学与工程学报,2009,28(5):1047-1054.
[3]李最雄,王旭东.古代土建筑遗址保护加固研究的新进展[J].敦煌研究,1997,(4):167-172.
[4]赵海英,李最雄,韩文峰,等.西北干旱区土遗址的主要病害及成因[J].岩石力学与工程学报,2003,22(增2):2875-2880.
[5]孙满利,李最雄,王旭东,等.干旱区土遗址病害的分类研究[J].工程地质学报,2007,15(6):772-778.
[6]刘琨,石玉成,卢育霞,等.玉门关段汉长城墙体结构抗震性能研究[J].世界地震工程,2010,26(1):47-52.
[7]高峰,石玉成,韦凯,等.锚杆加固对石窟地震反应的影响[J].世界地震工程,2006,22(2):84-88.
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