汶川地震古建筑轻度震害研究
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摘要
为保护古建筑,以四川省广元市觉苑寺逍遥楼为例,研究了汶川地震作用下,加固后的古建筑震害症状及抗震性能。根据震后勘查结果,讨论了逍遥楼的典型震害症状。根据木结构榫卯连接特点,建立了结构的有限元模型。通过模态分析,获得了逍遥楼的基频及主振型;通过对汶川波进行调幅并作用于该结构,获得地震作用下结构的内力及位移响应曲线;通过对结构进行7度罕遇地震作用下x、y双向响应谱分析,获得了结构的抗震能力。结果表明:加固后的逍遥楼振动形式以水平振动为主,在汶川地震作用下的震害程度轻,内力及变形响应峰值均在容许值范围内,且能够抵御7度罕遇地震作用。
In order to protect ancient buildings,the Xiao-Yao Palace in Sichuan province is taken as an example to study damage symptoms under Wenchuan earthquake as well as aseismic capacity of strengthened ancient buildings.According to survey results after earthquake,typical damage symptoms of Xiao-Yao Palace is discussed.Then according to characters of tenon-moritse joints of chinese ancient buildings,FEM of the palace is built.By modal analysis,basic frequency as well as main modes of the structure is obtained;By dynamic analysis,dispalcement and inner force responses of the structure under Wenchuan earthquake are obtained;By response spectrum analysis under 7-degree intensity of seldomly occurred earthquke in x and y directions,aseismic capacity of the structure is obtained.Results show that after strengthened,main modes of the Xiao-Yao Palace are of level directions;Under Wenchuan earthquake the structure is destroyed little,whose displacement as well as inner forces response values are less than permissible values;The structure can also resist 7-degree intensity of seldomly occurred earthquakes.
In order to protect ancient buildings,the Xiao-Yao Palace in Sichuan province is taken as an example to study damage symptoms under Wenchuan earthquake as well as aseismic capacity of strengthened ancient buildings.According to survey results after earthquake,typical damage symptoms of Xiao-Yao Palace is discussed.Then according to characters of tenon-moritse joints of chinese ancient buildings,FEM of the palace is built.By modal analysis,basic frequency as well as main modes of the structure is obtained;By dynamic analysis,dispalcement and inner force responses of the structure under Wenchuan earthquake are obtained;By response spectrum analysis under 7-degree intensity of seldomly occurred earthquke in x and y directions,aseismic capacity of the structure is obtained.Results show that after strengthened,main modes of the Xiao-Yao Palace are of level directions;Under Wenchuan earthquake the structure is destroyed little,whose displacement as well as inner forces response values are less than permissible values;The structure can also resist 7-degree intensity of seldomly occurred earthquakes.
引文
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[12]于业栓,薛建阳,赵鸿铁.碳纤维布及扁钢加固古建筑榫卯节点抗震性能试验研究[J].世界地震工程,2008,24(3):112~117Yu Ye-shuan,Xue Jian-yang,Zhao Hong-tie.Experimentalstudy on seismic behavior of mortise-tenon joints of Chineseancient wooden building strengthened with CFRP sheets andflat steel[J].World Earthquake Engineering,2008,24(3):112~117(in Chinese)
[13]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005Liu Jing-bo,Du Xiu-li.Structural Dynamics[M].Beijing,Mechanical Industrial Press,2005(in Chinese)
[14]GB50005-2003,木结构设计规范[S]GB50005-2003,Code for Design of Timber Structures[S](inChinese)
[15]薛素铎,赵均,高向宇.建筑抗震设计(第二版)[M].北京:科学出版社,2007,37~41Xue Su-duo,Zhao Jun,Gao Xiang-yu.Seismic DesignBuildings(2nd Edition)[M].Beijing:Science Press,2007,37~41(in Chinese)
[2]何玲,潘文,杨正海.村镇木结构房屋震害及抗震技术措施[J].工程抗震与加固改造,2006,28(6):94~101He Ling,Pan Wen,Yang Zheng-hai.Seismic damage of ruralwooden constitutions and their aseismic methods[J].Earthquake Resistant Engineering and Retrofitting.2006,28(6):94~101(in Chinese)
[3]柯吉鹏.古建筑的抗震性能与加固方法研究[D].北京:北京工业大学,2004:66~71Ke Ji-peng.Study on the seismic capacity and the reinforcedmethod of ancient buildings[D].Beijing:Beijing Universityof Technology,2004:66~71(in Chinese)
[4]杨焕成.地震前后古代建筑的检查方法和加固维修措施[J].中原文物,1985,2:96~98Yang Huan-cheng.Inspecting methods and strengtheningmeasures of ancient buildings before and after earthquake[J].Cultural Relics of Central China,1985,2:96~98(inChinese)
[5]GB50165-92,古建筑木结构维护与加固技术规范[S]GB50165-92,Technical Code for Maintance and Stren-gthening of Ancient Timber Buildings[S](in Chinese)
[6]沈聚敏,周锡元,高小旺,等.抗震工程学[M].北京:中国建筑工业出版社,2000Shen Ju-min,Zhou Xi-yuan,Gao Xiao-wang,et al.Aseismic Engineering[M].Beijing:Chinese Industrial Press,2000(in Chinese)
[7]赵均海,俞茂宏,杨松岩,等.中国古代木结构有限元动力分析[J].土木工程学报,2000,33(1):32~35Zhao Jun-hai,Yu Mao-hong,Yang Song-yan,et al.Dynamicanalysis for the ancient superstructure of the east city gate ofXi’An by FEM[J].China Civil Engineering Journal,2000,33(1):32~35(in Chinese)
[8]D.P.Fang,S.Iwasaki,M.H.Yu.Ancient Chinese timberarchitecture-Ⅰ:Experimental study[J].Journal of StructuralEngineering,2001,11:1348~1357
[9]D.P.Fang,S.Iwasaki,M.H.Yu.Ancient Chinese timberarchitecture-Ⅱ:Dynamic characteristics[J].Journal ofStructural Engineering,2001,11:1358~1364
[10]姚侃,赵鸿铁,葛鸿鹏.古建木结构榫卯连接特性的试验研究[J].工程力学,2006,23(10):168~172Yao Kan,Zhao Hong-tie,Ge Hong-peng.Experimentalstudies on the characteristic of mortise-tenon joint in thehistoric timber buildings[J].Engineering Mechanics,2006,23(10):168~172(in Chinese)
[11]谢启芳,赵鸿铁,薛建阳.中国古建筑木结构榫卯节点加固的试验研究[J].土木工程学报,2008,41(1):28~34Xie Qi-fang,Zhao Hong-tie,Xue Jian-yang.An experimentalstudy on the strengthening of mortise-tenon joints in ancientChinese wooden buildings[J].China Civil EngineeringJournal,2008,41(1):28~34(in Chinese)
[12]于业栓,薛建阳,赵鸿铁.碳纤维布及扁钢加固古建筑榫卯节点抗震性能试验研究[J].世界地震工程,2008,24(3):112~117Yu Ye-shuan,Xue Jian-yang,Zhao Hong-tie.Experimentalstudy on seismic behavior of mortise-tenon joints of Chineseancient wooden building strengthened with CFRP sheets andflat steel[J].World Earthquake Engineering,2008,24(3):112~117(in Chinese)
[13]刘晶波,杜修力.结构动力学[M].北京:机械工业出版社,2005Liu Jing-bo,Du Xiu-li.Structural Dynamics[M].Beijing,Mechanical Industrial Press,2005(in Chinese)
[14]GB50005-2003,木结构设计规范[S]GB50005-2003,Code for Design of Timber Structures[S](inChinese)
[15]薛素铎,赵均,高向宇.建筑抗震设计(第二版)[M].北京:科学出版社,2007,37~41Xue Su-duo,Zhao Jun,Gao Xiang-yu.Seismic DesignBuildings(2nd Edition)[M].Beijing:Science Press,2007,37~41(in Chinese)
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