罕遇地震作用下沧州铁狮子结构现状研究
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摘要
沧州铁狮子是我国首批国家级重点文物,也是中国乃至世界上年代最早、体积最大的单体浇筑的室外大型铸铁文物。为研究铁狮子在地震作用下的安全性,进行了弹塑性时程分析。采用三维激光扫描的方法建立了铁狮子的几何模型,在封闭的空间实体上划分网格得到有限元模型,对其在8度罕遇地震作用下响应进行了对比分析。计算结果表明铁狮子本身及支架的应力均远小于相应材料的强度,水平及竖向变形均较小,铁狮子结构的抗震性能满足要求。
The Cangzhou iron lion is the first batch important heritage site under state protection,and it is also an earliest and bigness cast iron historical relic by one pouring technology.In order to evaluate the seismic safety of the lion,a non-linear time-history analysis was performed with finite element program.After the geographical model of the lion was acquired by the method of 3D laser scanning,a finite element model was founded though meshing on the closed entity and then the response of the lion under 8 degrees of an unordinary earthquake action.The results show that the stress of both the lion and its brackets is less than the yield stress respectively,horizontal and vertical displacements are both on the small side,and the lion structure has sufficient seismic safety.
The Cangzhou iron lion is the first batch important heritage site under state protection,and it is also an earliest and bigness cast iron historical relic by one pouring technology.In order to evaluate the seismic safety of the lion,a non-linear time-history analysis was performed with finite element program.After the geographical model of the lion was acquired by the method of 3D laser scanning,a finite element model was founded though meshing on the closed entity and then the response of the lion under 8 degrees of an unordinary earthquake action.The results show that the stress of both the lion and its brackets is less than the yield stress respectively,horizontal and vertical displacements are both on the small side,and the lion structure has sufficient seismic safety.
引文
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[5]王福谆.古代大铁狮[J].铸造设备研究,2007(1):53―58.Wang Fuzhun.The big iron lion in ancient times[J].Research Studies on Foundry Equipment,2007(1):53―58.(in Chinese)
[6]王玉芳.沧州铁狮历次维修保护概述[J].文物春秋,2008(3):49―57.Wang Yufang.Summaries of protection of Canzhou iron lion[J].Stories of Relics,2008(3):49―57.(in Chinese)
[7]河北古代建筑保护研究所,北京科技大学.沧州铁狮子力学仿真研究报告[R].北京:北京科技大学,2001.Institute of Ancient Buildings Preservation Hebei Province,University of Science and Technology Beijing.Mechanical simulation report of Cangzhou iron lion[R].Beijing:University of Science and Technology Beijing,2001.(in Chinese)
[8]Pavlidis G,Koutsoudis A,Arnaoutoglou F,Tsioukas V,Chamzas C.Method for 3D digitization of Cultural Heritage[J].Journal of Cultural Heritage,2007(8):93―98.
[9]Fontana R,Greco M,Materazzi M,Pampaloni E,Pezzati L,Rocchini C,Scopigno R.Three-dimensional modeling of statues:the Minerva of Arezzo[J].Journal of Cultural Heritage,2002(3):325―331.
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[11]中华人民共和国建设部.建筑抗震设计规范[S].北京:中国建筑工业出版社,2001.Ministry of Construction of the People’s Republic of China.Code for seismic design of buildings[S].Beijing:China Building Industry Press,2001.(in Chinese)
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