古建筑木结构直榫节点力学模型的研究
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摘要
以中国西南地区穿斗式古建筑木结构中常见的直榫节点为研究对象,对其在低周往复荷载作用下的受力机理进行了详细分析,建立了考虑节点拔榫量影响的M-θ力学模型和相应的实现算法,并给出了简化计算公式,最后采用试验数据对该力学模型进行了验证。结果表明,直榫节点的M-θ力学模型的计算结果与试验曲线吻合良好,可为中国古建筑木结构的抗震性能及加固的研究提供理论基础。
Straight-tenon joints in ancient timber structures in southwestern China using column and tie construction are studied. Their mechanical behavior under low-cycle reversed loading is analyzed in detail, and an M-θ mechanical model considering the effect of pull-tenon capacity of joints is proposed. Experimental data are employed to validate the new mechanical model, and it demonstrates that results from the proposed model are in good agreement with those from experiments. Hence, the proposed mechanical model will definitely play a role in theoretical analyses of the seismic performance and reinforcement of Chinese ancient timber structures.
Straight-tenon joints in ancient timber structures in southwestern China using column and tie construction are studied. Their mechanical behavior under low-cycle reversed loading is analyzed in detail, and an M-θ mechanical model considering the effect of pull-tenon capacity of joints is proposed. Experimental data are employed to validate the new mechanical model, and it demonstrates that results from the proposed model are in good agreement with those from experiments. Hence, the proposed mechanical model will definitely play a role in theoretical analyses of the seismic performance and reinforcement of Chinese ancient timber structures.
引文
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[2]潘毅,王超,季晨龙,赵世春.汶川地震中木结构古建筑的震害调查与分析[J].建筑科学,2012,28(7):103―106.Pan Yi,Wang Chao,Ji Chenlon,Zhao Shichun.Investigation and analysis of seismic damage for Chinese ancient timber buildings in Wenchuan Earthquake[J].Building Science,2012,28(7):103―106.(in Chinese)
[3]潘毅,唐丽娜,王慧琴,姚蕴艺.芦山7.0级地震古建筑震害调查分析[J].地震工程与工程振动,2014,34(1):140―146.Pan Yi,Tang Lina,Wang Huiqin,Yao Yunyi.Investigation and analysis of damage to ancient buildings in Lushan Ms 7.0 earthquake[J].Journal of Earthquake Engineering and Engineering Vibration,2014,34(1):140―146.(in Chinese)
[4]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―173.Yao Kan,Zhao Hongtie,Ge Hongpeng.Experimental studies on the characteristic of mortise-tenon joint in historic timber buildings[J].Engineering Mechanics,2006,23(10):168―173.(in Chinese)
[5]KISH I N,Chen W F.Moment-rotation relations of semi-rigid connections with angles[J].Structure Engineering,ASCE,1990,116(7):1813―1834.
[6]杨艳华,王俊鑫,徐彬.古木建筑榫卯连接M-θ相关曲线模型研究[J].昆明理工大学学报(理工版),2009,34(1):72―76.Yang Yanhua,Wang Junxin,Xu Bin.Research of interaction curves model of mortise-tenon joint in historic timber buildings[J].Journal of Kunming University of Science and Technology(Science and Technology),2009,34(1):72―76.(in Chinese)
[7]GB50005-2003,木结构设计规范[S].北京:中国建筑工业出版社,2003.GB 50005-2003,Code for dsign of tmber sructures[S].Beijing:Chinese Building Industry Press,2003.(in Chinese)
[8]Van der Put T A C M.A continuum failure criterion applicable to wood[J].Journal of Wood Science,2009,55:315―322.
[9]陈志勇,祝恩淳,潘景龙.复杂应力状态下木材力学性能的数值模拟[J].计算力学学报,2011,28(4):629―635.Chen Zhiyong,Zhu Enchun,Pan Jinglong.Numerical simulation of mechanical behaviour of wood under complex stress[J].Chinese Journal of Computational Mechanics,2011,28(4):629―635.(in Chinese)
[10]赵鸿铁,董春盈,薛建阳,等.古建筑木结构透榫节点特性试验分析[J].西安建筑科技大学学报,2010,42(3):315―318.Zhao Hongtie,Dong Chunying,Xue Jianyang,et al.The experimental study on the characteristics of mortise-tenon joint historic timber buildings[J].Journal of Xi’an University of Architecture and Technology(Natural Science Edition),2010,42(3):315―318.(in Chinese)
[11]李琪.古建筑木结构榫卯及木构架力学性能与抗震研究[D].西安:西安建筑科技大学,2008.Li Qi.Study of rabbets and mechanical properties and seismic performance of timber frame of Chinese historic timber buildings[D].Xi’an:Xi’an University of Architecture and Technology,2008.(in Chinese)
[12]方东平,俞茂宏,宫本裕,岩崎正二,严坂熙.木结构古建筑结构特性的计算研究[J].工程力学,2001,18(1):137―144.Fang Dongping,Yu Maohong,Miyamoto Y,Iwasaki S,Hikosaka H.Experimental studies on structural characteristics of ancient timber architectures[J].Engineering Mechanics,2001,18(1):137―144.(in Chinese)
[13]孙训芳.材料力学[M].北京:高等教育出版社,2009:102―114.Sun Xunfang.Mechanics of mterials[M].Beijing:Higher Education Publishing House,2009:102―114.(in Chinese)
[14]徐明刚.中国古建筑木结构榫卯节点抗震性能研究[D].南京:东南大学,2011.Xu Minggang.Study of aseismic behavior of mortise-tenon joints in Chinese ancient timber buildings[D].Nanjing:Southeast University,2011.(in Chinese)
[15]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,Zhang Pengcheng.Study on the seismic behaviors of Chinese ancient wooden building by shaking table test[J].China Civil Engineering Journal,2004,37(6):6―11.(in Chinese)
[16]Johns K C,Lacroix S.Composite reinforcement of timber in bending[J].Canadian Journal of Civil Engineering,2000,27(5):899―906.
[17]闻邦椿.机械设计手册[M].北京:机械工业出版社,2010:34―35.Wen Bangchun.Mechanical Design Handbook[M].Beijing:Mechanical Industry Publishing House,2012:34―35.(in Chinese)
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