古建筑木结构榫卯节点采用碳纤维布加固模型振动台试验研究
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摘要
对宋代殿堂式木构建筑心间缩尺模型已残损的燕尾榫节点用碳纤维(CFRP)布进行加固,并进行模拟地震振动台试验。选用El Centro波、Taft波、兰州波作为输入地震波,采用多点多指标同步测量柱根、柱头、斗栱的地震响应,对CFRP加固模型结构的破坏形态、动力特性、耗能能力进行分析。结果表明:CFRP加固模型的自振周期T的变化范围在0.53～0.67 s之间,阻尼比ξ的变化范围在2.8%～4.6%之间,随着地震激励的增加而增大;加固模型的动力放大系数β小于1,随着地震激励的增加而减小;模型的铺作层、柱础层通过摩擦滑移来耗能,柱架层的耗能能力最强,在模型整体的耗能、减震中起着主要作用。
An ancient palace timber structure model was made according to the requirements of fabrication methods of Song Dynasty(960-1270 A.D.).All damaged swallow-tailed mortise-tenon joints of frame were strengthened with carbon fiber reinforced polymer(CFRP) sheets.The shaking table test was carried out.The sensors were placed to measure the real-time responses of the model and the data of the shaking table itself under three earthquake waves: El Centro,Taft and Lanzhou waves.The failure mode,dynamic behavior and hysteretic energy dissipation performance were analyzed.The following conclusions are drawn: The natural period and damping ratio of the model increase along with the increasing of the input seismic energy.The range of natural periods T is 0.53-0.67 s and the damping ratio ξ is 2.8%-4.6%.The dynamic magnification factor β decreases with the increasing of the vibration excitation.Bucket arch layer and column base dissipate seismic energy by means of frictional slippage.The joints strengthened with CFRP sheets have the strongest energy dissipation capacity and play a major role in the shock absorption.
An ancient palace timber structure model was made according to the requirements of fabrication methods of Song Dynasty(960-1270 A.D.).All damaged swallow-tailed mortise-tenon joints of frame were strengthened with carbon fiber reinforced polymer(CFRP) sheets.The shaking table test was carried out.The sensors were placed to measure the real-time responses of the model and the data of the shaking table itself under three earthquake waves: El Centro,Taft and Lanzhou waves.The failure mode,dynamic behavior and hysteretic energy dissipation performance were analyzed.The following conclusions are drawn: The natural period and damping ratio of the model increase along with the increasing of the input seismic energy.The range of natural periods T is 0.53-0.67 s and the damping ratio ξ is 2.8%-4.6%.The dynamic magnification factor β decreases with the increasing of the vibration excitation.Bucket arch layer and column base dissipate seismic energy by means of frictional slippage.The joints strengthened with CFRP sheets have the strongest energy dissipation capacity and play a major role in the shock absorption.
引文
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[8]李诫(宋).营造法式[M].上海:商务印书馆,1950:87-119.
[9]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001:152-185.(Yao Qianfeng,ChenPing.Civil engineering experiment[M].Beijing:China Architecture&Building Press,2001:152-185.(in Chinese))
[10]梁思成.梁思成全集:第七卷[M].北京:中国建筑工业出版社,2001:219-307.
[11]隋,赵鸿铁,薛建阳,等.古代殿堂式木结构建筑模型振动台试验研究[J].建筑结构学报,2010,31(2):35-40.(SUI Yan,ZHAO Hongtie,XUE Jianyang,et al.A study on Chinese ancient timber structures byshaking table test[J].Joumal of Building Structures,2010,31(2):35-40.(in Chinese))
[12]隋,赵鸿铁,薛建阳,等.中国古建筑木结构铺作层与柱架抗震试验研究[J].土木工程学报,2011,44(1):50-57.(Sui Yan,Zhao Hongtie,Xue Jianyang,et al.Experimental study of the seismicity of Dougongand wooden frame in Chinese historic buildings[J].China Civil Engineering Journal,2011,44(1):50-57.(in Chinese))
[13]谢启芳,赵鸿铁,薛建阳.中国古建筑木结构榫卯节点加固试验研究[J].土木工程学报,2008,41(4):28-34.(Xie Qifang,Zhao Hongtie,Xue Jianyang.Anexperimental study on the strengthening of mortise-tenonjoints in ancient Chinese wooden buildings[J].ChinaCivil Engineering Journal,2008,41(4):28-34.(inChinese))
[14]GB/T17742—2008中国地震烈度表[S].2008.(GB/T 17742—2008 The Chinese seismic intensityscale[S].2008.(in Chinese))
[2]祝金标,王柏生,王建波.碳纤维布加固破损木梁的试验研究[J].工业建筑,2005,35(10):86-89.(Zhu Jinbiao,Wang Baisheng,Wang Jianbo.Experimental study of strengthening damaged woodbeams with CFRP[J].Industrial Construction,2005,35(10):86-89.(in Chinese))
[3]许清风,朱雷.FRP加固木结构的研究进展[J].工业建筑,2007,37(9):104-108.(Xu Qingfeng,ZhuLei.State-of-the-art of wood structure strengthened withFRP[J].Industrial Construction,2007,37(9):104-108.(in Chinese))
[4]袁建力,刘殿华,李胜才,等.虎丘塔的倾斜控制和加固技术[J].土木工程学报,2004,37(5):44-49.(Yuan Jianli,Liu Dianhua,Li Shengcai,et al.Inclination-control and strengthening technology appliedto Huqiu Pagoda[J].China Civil Engineering Journal,2004,37(5):44-49.(in Chinese))
[5]樊承谋,王林安,潘景龙.应县木塔修缮用木材的防裂措施[J].北京林业大学学报,2006,28(1):98-102.(Fan Chengmou,Wang Linan,Pan Jinglong.Measures to control seasoning checks of wood used forthe repair of the ancient wooden tower in YingxianCounty,Shanxi Province[J].Journal of BeijingForestry University,2006,28(1):98-102.(inChinese))
[6]隋,赵鸿铁,薛建阳,等.古建木构铺作层侧向刚度的试验研究[J].工程力学,2010,27(3):74-78.(Sui Yan,Zhao Hongtie,Xue Jianyang,et al.Experimental study on lateral stiffness of Dougong layerin Chinese historic buildings[J].EngineeringMechanics,2010,27(3):74-78.(in Chinese))
[7]薛建阳,赵鸿铁,张鹏程.中国古建筑木结构模型的振动台试验研究[J].土木工程学报,2004,37(6):6-11.(Xue Jianyang,Zhao Hongtie,ZhangPengcheng.Study on the seismic behaviors of Chineseancient wooden building by shaking table test[J].China Civil Engineering Journal,2004,37(6):6-11.(in Chinese))
[8]李诫(宋).营造法式[M].上海:商务印书馆,1950:87-119.
[9]姚谦峰,陈平.土木工程结构试验[M].北京:中国建筑工业出版社,2001:152-185.(Yao Qianfeng,ChenPing.Civil engineering experiment[M].Beijing:China Architecture&Building Press,2001:152-185.(in Chinese))
[10]梁思成.梁思成全集:第七卷[M].北京:中国建筑工业出版社,2001:219-307.
[11]隋,赵鸿铁,薛建阳,等.古代殿堂式木结构建筑模型振动台试验研究[J].建筑结构学报,2010,31(2):35-40.(SUI Yan,ZHAO Hongtie,XUE Jianyang,et al.A study on Chinese ancient timber structures byshaking table test[J].Joumal of Building Structures,2010,31(2):35-40.(in Chinese))
[12]隋,赵鸿铁,薛建阳,等.中国古建筑木结构铺作层与柱架抗震试验研究[J].土木工程学报,2011,44(1):50-57.(Sui Yan,Zhao Hongtie,Xue Jianyang,et al.Experimental study of the seismicity of Dougongand wooden frame in Chinese historic buildings[J].China Civil Engineering Journal,2011,44(1):50-57.(in Chinese))
[13]谢启芳,赵鸿铁,薛建阳.中国古建筑木结构榫卯节点加固试验研究[J].土木工程学报,2008,41(4):28-34.(Xie Qifang,Zhao Hongtie,Xue Jianyang.Anexperimental study on the strengthening of mortise-tenonjoints in ancient Chinese wooden buildings[J].ChinaCivil Engineering Journal,2008,41(4):28-34.(inChinese))
[14]GB/T17742—2008中国地震烈度表[S].2008.(GB/T 17742—2008 The Chinese seismic intensityscale[S].2008.(in Chinese))
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