古建筑榫卯节点加固方法振动台试验研究
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摘要
为保护古建筑,采用振动台试验方法,研究了中国古建筑榫卯节点的有效抗震加固方法。基于某古建筑的实际尺寸,制作了1∶8缩尺比例的木结构空间框架模型,其中梁和柱采用燕尾榫形式连接。分别考虑马口铁、钢构件和CFRP布加固榫卯节点,进行了振动台试验。通过白噪声激励,获得了构架加固前后的基频及阻尼比;通过输入不同加速度峰值的El-Centro波,获得了典型节点的位移响应、加速度响应及减震系数等抗震参数。结果表明,构架加固前后的基频J(钢构件)>J(CFRP布)>J(马口铁)>J(未加固);阻尼比D(未加固)>D(马口铁)>D(钢构件)>D(CFRP布);构架位移响应峰值umax(CFRP布)To protect Chinese ancient building,strengthening methods on Chinese ancient tenon-mortise joint were studied by shaking table tests.Based on actual sizes of an ancient wooden building,wooden frame models with a scale of 1∶8 of the prototype structure were built considering Yan-wei type of tenon-mortise connections.Iron hook,steel components and CFRP(Carbon Fibre Reinforced Plastic) sheets were considered to strengthen tenon-mortise joint of model to enhance its stability.By white noise excitation values of basic frequency as well as damping ratio of model in both strengthened and unstrengthened conditions were obtained.By inputing El-Centro earthquake waves of different peak acceleration values,responses of displacement and acceleration for typical nodes of model were obtained,and vibration absorption ratio values for both model and tenon-mortise joint were discussed.Results showed that for different strengthening method:J(steel components)>J(CFRP sheets)>J(iron hook)>J(no-strengthen) in basic frequency of model(J).D(no-strengthen)>D(iron hook)>D(steel components)>D(CFRP sheets) in damping ratio of model(D).umax(CFRP sheets)
引文
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[2]Shi Zhimin,Zhou Qian,Jin Hongkui.Study on mechanicalproblems and strengthening methods on some components ofthe Taihe Palace in the Palace Museum[J].Sciences ofConservation and Archaeology,2009,21(1):15-21.[石志敏,周乾,晋宏逵.故宫太和殿木构件现状分析及加固方法研究[J].文物保护与考古科学,2009,21(1):15-21.]
[3]Xie Qifang,Zhao Hongtie,Xue Jianyang.An experimentalstudy on the strengthening of mortise-tenon joints in ancientChinese wooden buildings[J].China Civil Engineering Jour-nal,2008,41(1):28-34.[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.]
[4]Yu Yeshuan,Xue Jianyang,Zhao Hongtie.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.[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.]
[5]Liao Weifa.Mechanical behavior of retrofitted Taiwan tradi-tional tenon and mortise wood joints[D].Taipei:Taipei Uni-versity of Technology,2007.[廖伟发.台湾传统建筑直榫木接头补强之力学行为[D].台北:台北科技大学,2007.]
[6]Bin Huizhong,Lu Bingjie.Study on cai-fen rule in Song Dy-nasty and dou-kou rule in Qing Dynasty[J].Anhui Archi-tecture,2003,10(3):1-2.[宾慧中,路秉杰.浅识宋材份制与清斗口制[J].安徽建筑,2003,10(3):1-2.]
[7]Zhou Qian,Yan Weiming,Li Zhenbao,et al.A strengtheninginstallation for tenon-mortise joint of middle span of Chineseancient wooden building:China,200920108277.0[P].2010-04-21.[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,200920108277.0[P].2010-04-21.]
[8]Ge Hongpeng,Zhou Peng,Wu Kai,et al.Amortization re-search on the characteristic of mortise-tenon joint in historictimber buildings[J].Building Structure,2010,40(S):30-36.[葛鸿鹏,周鹏,伍凯,等.古建木结构榫卯节点减震作用研究[J].建筑结构,2010,40(S):30-36.]
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