马口铁加固古建筑抗震试验
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摘要
采用试验方法,研究了马口铁加固古建筑榫卯节点后木构架的抗震性能.基于故宫太和殿三次间的相关尺寸,制作了1∶8的4梁4柱榫卯连接木结构空间框架模型,采用人工加载方式,进行了低周反复加载试验,获得了加固前后构架的力-侧移滞回曲线和骨架曲线,分析了加固前后的构架耗能能力、刚度退化规律及变形能力.结果表明,马口铁加固榫卯节点后,马口铁对榫卯节点的约束作用在一定程度上减小了节点拔榫量,提高了构架的侧移刚度及承载力;加固后的构架刚度退化不明显,变形能力较强,但是耗能能力减弱.
To protect Chinese ancient buildings,aseismic behaviors of wooden structure strengthened by iron-hook are studied through experiments.Based on actual sizes of the 3rd frame of Tai-He Palace in the Forbidden City,three wooden frame models with a scale of 1∶8 of the prototype structure were built considering tenon-mortise connections.Low cyclic reversed loading tests were carried out by manual loading means and means of load-displacement hysteretic curves and skeleton curves of the structures were obtained.By analyzing their energy dissipation capability,stiffiness degradation and deformation performance were studied.Results show that after the structure is being strengthened by iron-hooks and with their embedding effects,tenon pulled out of the mortise becomes less,stiffness and strength of the structure are enhanced,stiffness degradation of the structure is not obvious,and its deformation performance is still good,however its energy dissipation capability decreases.
To protect Chinese ancient buildings,aseismic behaviors of wooden structure strengthened by iron-hook are studied through experiments.Based on actual sizes of the 3rd frame of Tai-He Palace in the Forbidden City,three wooden frame models with a scale of 1∶8 of the prototype structure were built considering tenon-mortise connections.Low cyclic reversed loading tests were carried out by manual loading means and means of load-displacement hysteretic curves and skeleton curves of the structures were obtained.By analyzing their energy dissipation capability,stiffiness degradation and deformation performance were studied.Results show that after the structure is being strengthened by iron-hooks and with their embedding effects,tenon pulled out of the mortise becomes less,stiffness and strength of the structure are enhanced,stiffness degradation of the structure is not obvious,and its deformation performance is still good,however its energy dissipation capability decreases.
引文
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[2]CHANG Wen-Shao,HSU M,KOMATSU K.Rotationalperformance of traditional Nuki joints with gapⅠ:theoryand verification[J].Journal of Wood Science,2006,52:58-62.
[3]CHANG Wen-Shao,HSU M.Rotational performance oftraditional Nuki joints with gapⅡ:the behavior of buttedNuki joint and its comparison with continuous Nuki joint[J].Journal of Wood Science,2007,53:401-407.
[4]谢启芳,赵鸿铁,薛建阳,等.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,et al.Anexperimental study on the strengthening of mortise-tenonjoints in ancient Chinese wooden buildings[J].China CivilEngineering Journal,2008,41(1):28-34.(in Chinese)
[5]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.Experimental study on seismic behavior of mortise-tenonjoints of Chinese ancient wooden building strengthened withCFRP sheets and flat steel[J].World EarthquakeEngineering,2008,24(3):112-117.(in Chinese)
[6]廖伟发.台湾传统建筑直榫木接头补强之力学行为[D].台湾:台北科技大学土木与防灾研究所,2007:15-20.LIAO Wei-fa.Mechanical behavior of retrofitted Taiwantraditional tenon and mortise wood joints[D].Taiwan:Graduate School of Disaster Mitigation in Civil Engineeringof Taipei University of Technology,2007:15-20.(inChinese)
[7]周乾,闫维明,杨小森,等.汶川地震古建筑轻度震害研究[J].工程抗震与加固改造,2009,31(5):101-107.ZHOU Qian,YAN Wei-ming,YANG Xiao-sen,et al.Study on slight damage of a strengthened Chinese ancientbuilding under wenchuan earthquake[J].EarthquakeResistant Engineering and Retrofitting,2009,31(5):101-107.(in Chinese)
[8]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:西安建筑科技大学土木学院,2004:32-33.GE Hong-peng.Experimental study on seismic behavior ofChinese ancient wooden building with strengthened mortise-tenon[D].Xi’an:College of Civil Engineering of Xi’anUniversity of Architecture and Technology,2004:32-33.(in Chinese)
[9]宾慧中,路秉杰.浅识宋材份制与清斗口制[J].安徽建筑,2003(3):1-2.BIN Hui-zhong,LU Bing-jie.Study on cai-fen rule in SongDynasty and dou-kou rule in Qing Dynasty[J].AnhuiArchitecture,2003(3):1-2.(in Chinese)
[10]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.GE Hong-peng,ZHOU Peng,WU Kai,et al.Amortization research on the characteristics of mortise-tenon joint in historic timber buildings[J].BuildingStructure,2010,40(s):30-36.(in Chinese).
[11]隋龑,赵鸿铁,薛建阳,等.古建筑木结构直榫和燕尾榫节点试验研究[J].世界地震工程,2010,26(2):88-92.SUI Yan,ZHAO Hong-tie,XUE Jian-yang,et al.Experimental study on characteristics of mortise-tenonjoints in historic timber buildings[J].World EarthquakeEngineering,2010,26(2):88-92.(in Chinese).
[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,2004:232-233.
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