3种材料加固古建筑木构架榫卯节点的抗震性能
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摘要
采用扒钉、CFRP布(碳纤维增强塑料布)和钢箍3种材料加固古建筑木构架榫卯节点.通过人工加载方式,进行低周反复加载试验,分析3种材料加固后榫卯节点M-θ(弯矩-转角)滞回曲线、M-θ均值骨架曲线、耗能能力、刚度退化和延性的变化,对比了3种材料加固榫卯节点的抗震效果,并对3种材料在木构架加固工程中的应用提出建议.结果表明:榫卯节点加固前后均有良好的变形能力;CFRP布加固节点承载力>钢箍加固节点承载力>扒钉加固节点承载力;CFRP布加固节点耗能能力>钢箍加固节点耗能能力>扒钉加固节点耗能能力;CFRP布加固节点刚度退化>扒钉加固节点刚度退化>钢箍加固节点刚度退化;CFRP布加固节点延性>扒钉加固节点延性>钢箍加固节点延性.建议扒钉用于小型木构架加固;CFRP布用于中小型木构架加固;钢箍用于中大型木构架加固.
The tenon-mortise joints in wooden frame in Chinese ancient building were strengthened by iron hook,CFRP sheets(carbon fiber reinforced plastic sheets)and steel bands.The changes of M-θ(momentrotation angle)hysteretic curve,average M-θskeleton curve,energy dissipation capability,stiffness degradation and ductility of tenon-mortise joints after strengthened by three materials were analyzed by low-reversed cyclic manual loading experiment.The aseismic behaviors of tenon-mortise joints strengthened by three materials were compared.The engineering application range for three materials in strengthening wooden frame were proposed.Results show that the tenon-mortise joints have good deformation performance both before and after strengthened.For three strengthening materials,CFRP sheets>steel bands> iron hook in bearing capability of tenon-mortise joint;CFRP sheets>steel bands>iron hook in energy dissipation capability of joint;CFRP sheets>iron hook>steel bands in stiffness degradation of joint;CFRP sheets>iron hook>steel bands in ductility of joint.Thus engineering application suggestions for three strengthening materials are as follows:Iron hook may be used for small wooden frame;CFRP sheets for medium and small wooden frame;steel bands for medium and large wooden frame.
The tenon-mortise joints in wooden frame in Chinese ancient building were strengthened by iron hook,CFRP sheets(carbon fiber reinforced plastic sheets)and steel bands.The changes of M-θ(momentrotation angle)hysteretic curve,average M-θskeleton curve,energy dissipation capability,stiffness degradation and ductility of tenon-mortise joints after strengthened by three materials were analyzed by low-reversed cyclic manual loading experiment.The aseismic behaviors of tenon-mortise joints strengthened by three materials were compared.The engineering application range for three materials in strengthening wooden frame were proposed.Results show that the tenon-mortise joints have good deformation performance both before and after strengthened.For three strengthening materials,CFRP sheets>steel bands> iron hook in bearing capability of tenon-mortise joint;CFRP sheets>steel bands>iron hook in energy dissipation capability of joint;CFRP sheets>iron hook>steel bands in stiffness degradation of joint;CFRP sheets>iron hook>steel bands in ductility of joint.Thus engineering application suggestions for three strengthening materials are as follows:Iron hook may be used for small wooden frame;CFRP sheets for medium and small wooden frame;steel bands for medium and large wooden frame.
引文
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[13]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):168-172.YAO Kan,ZHAO Hong-tie,GE Hong-peng.Experimentalstudies on the characteristic of mortise-tenon joint in the historic timber buildings[J].Engineering Mechanics,2006,23(10):168-172.(in Chinese)
[14]王来,王铁成,陈倩.低周反复荷载下方钢管混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2003,23(3):113-177.WANG Lai,WANG Tie-cheng,CHEN Qian.Experimentalstudy on seismic performance of concrete-filled rectangular tu-bular frame under low-reversed cyclic loading[J].EarthquakeEngineering and Engineering Vibration,2003,23(3):113-177 .(in Chinese)
[2]ZHOU Q,YAN W M,ZHANG B.Aseismic characters of ten-on-mortise joints of Chinese ancient wooden construction bynumerical analysis[C]∥ISISS 2009:Innovation&Sustain-ability of Structures.Guangzhou:South China University ofTechnology Press,2009:1379-1384.
[3]FANG D P,IWASAKI S,YU M H.Ancient Chinese timberarchitecture(Ⅰ):Experimental study[J].Journal of Struc-tural Engineering,2001,127(11):1348-1357.
[4]FANG D P,IWASAKI S,YU M H.Ancient Chinese timberarchitecture(Ⅱ):Dynamic characteristics[J].Journal of Struc-tural Engineering,2001,127(11):1358-1364.
[5]CHANG W S,HSU M F,KOMATSU K.Rotational perform-ance of traditional Nuki joints with gap(I):Theory and verifi-cation[J].Journal of Wood Science,2006,52(1):58-62.
[6]CHANG W S,HSU M F.Rotational performance of tradi-tional Nuki joints with gap(Ⅱ):The behavior of butted Nukijoint and its comparison with continuous Nuki joint[J].Jour-nal of Wood Science,2007,53(5):401-407.
[7]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):28-34.XIE Qi-fang,ZHAO Hong-tie,XUE Jian-yang.An experi-mental study on the strengthening of mortise-tenon joints inancient Chinese wooden buildings[J].China Civil EngineeringJournal,2008,41(1):28-34.(in Chinese)
[8]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):112-117.YU Ye-shuan,XUE Jian-yang,ZHAO Hong-tie.Experimen-tal study on seismic behavior of mortise-tenon joints of Chi-nese ancient wooden building strengthened with CFRP sheetsand flat steel[J].World Earthquake Engineering,2008,24(3):112-117.(in Chinese)
[9]葛鸿鹏.中国古代木结构建筑榫卯加固抗震试验研究[D].西安:西安建筑科技大学,2004.GE Hong-peng.Experimental study on seismic behavior ofChinese ancient wooden building with strengthened mortise-tenon[D].Xi'an:Xi'an University of Architecture and Tech-nology,2004.(in Chinese)
[10]周乾,闫维明,李振宝,等.用于古建筑木结构中间跨榫卯节点的加固装置:中国,CN200920108277.0[P].2010-04-21.ZHOU Qian,YAN Wei-ming,LI Zhen-bao,et al.A streng-thening installation for tenon-mortise joint of middle span ofancient wooden building:China,CN200920108277.0[P].2010-04-21.(in Chinese)
[11]吴轶,何铭基,郑俊光,等.耗能腋撑对钢筋混凝土框架抗震加固性能分析[J].广西大学学报:自然科学版,2009,34(6):725-730.WU Yi,HE Ming-ji,ZHENG Jun-guang,et al.Analyses ofseismic retrofitting performances of reinforced concrete framewith energy dissipation haunch braces[J].Journal of GuangxiUniversity:Natural Science,2009,34(6):725-730.(in Chi-nese)
[12]李忠献.工程结构试验理论与技术[M].天津:天津大学出版社,2003:232-233.LI Zhong-xian.Theory and technique of engineering structureand structure experiments[M].Tianjin:Tianjin UniversityPress,2003:232-233.(in Chinese)
[13]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):168-172.YAO Kan,ZHAO Hong-tie,GE Hong-peng.Experimentalstudies on the characteristic of mortise-tenon joint in the historic timber buildings[J].Engineering Mechanics,2006,23(10):168-172.(in Chinese)
[14]王来,王铁成,陈倩.低周反复荷载下方钢管混凝土框架抗震性能的试验研究[J].地震工程与工程振动,2003,23(3):113-177.WANG Lai,WANG Tie-cheng,CHEN Qian.Experimentalstudy on seismic performance of concrete-filled rectangular tu-bular frame under low-reversed cyclic loading[J].EarthquakeEngineering and Engineering Vibration,2003,23(3):113-177 .(in Chinese)
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