暗销在藏式古建筑木结构连接中的作用
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摘要
与传统汉式古建筑木结构相比,藏式古建筑木结构具有连接简单、传力直接、构造简洁等特点,其木结构梁柱节点连接很少采用复杂榫卯和斗拱,主要通过构件的垂直叠压实现节点连接功能,并辅以暗销来定位.文中采用非线性有限元方法,通过建立局部构件精细化模型,研究了暗销在节点连接中的力学作用,得到了描述暗销力学性质的弹簧模型.研究结果表明:暗销使滑移初始刚度略有提高,对构件相对滑移承载极限提高明显.
Compared to traditional Chinese ancient timber structures,the beam-column connection of Tibetan ancient architecture features in simple connections,direct load transmission paths and concise constructions.Mortise-tenon and dougong connections are rarely used in Tibetan ancient architectures.The beam-column connection joint is formed by laminated members with dowels.In this paper,a refined nonlinear FEM model was established and the mechanical role of dowels were studied.A spring model was obtained finally to present dowel properties.The results showed that dowels could increase the initial slip stiffness slightly and improve the bearing capacity of member relative sliding greatly.
Compared to traditional Chinese ancient timber structures,the beam-column connection of Tibetan ancient architecture features in simple connections,direct load transmission paths and concise constructions.Mortise-tenon and dougong connections are rarely used in Tibetan ancient architectures.The beam-column connection joint is formed by laminated members with dowels.In this paper,a refined nonlinear FEM model was established and the mechanical role of dowels were studied.A spring model was obtained finally to present dowel properties.The results showed that dowels could increase the initial slip stiffness slightly and improve the bearing capacity of member relative sliding greatly.
引文
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[3]张文芳,李世温,程文.一类斗拱木结构恢复力特性的模型试验研究[J].东南大学学报,1997,27(增):65-70.ZHANG Wenfang,LI Shiwen,CHENG Wenrang.Studyon Model Test of One Dougong’s Restoring Force Property[J].Journal of Southeast University,1997,27(S0):65-70.(in Chinese)
[4]赵均海,俞茂宏,杨松岩.中国古代木结构斗拱的动力试验研究[J].实验力学,1999,14(1):106-112.ZHAO Junhai,YU Maohong,YANG Songyan.Study onDynamic Test of Dougong in Chinese Ancient TimberBuilding[J].Journal of Experimental Mechanics,1999,14(1):106-112.(in Chinese)
[5]魏国安.古建筑木结构斗拱力学性能及ANSYS分析[D].西安:西安建筑科技大学,2007.WEI Guoan.Mechanical Behavior and ANSYS Analysis ofDougong in Chinese Ancient Timber Building[D].Xi’an:Xi’an University of Architecture and Technology,2007.(in Chinese)
[6]竺润祥,董益平,任茶仙,等.榫卯连接的古木结构静力分析[C]∥第十二届全国结构工程学术会议论文集.重庆,2003:1183-1186.ZHU Runxiang,DONG Yiping,REN Chaxian,et al.Static Analysis of Mortise-Tenon Connection in AncientTimber Structure[C]∥The 12th National Structural Engi-neering Conference.Chongqing,2003:1183-1186.(inChinese)
[7]阿肯江.托呼提,亓国庆.基于ANSYS的木梁有限元静力弹塑性分析[J].世界地震工程,2007,23(3):152-157.Akenjian.Tuohuti,QI Guoqing.Nonlinear Analysis ofWood Beam with Software ANSYS[J].Word EarthquakeEngineering,2007,23(3):152-157.(in Chinese)
[8]《木结构设计手册》编辑委员会.木结构设计手册[M].3版.北京:中国建筑工业出版社,2005.Editorial Board of‘Design Manual of Timber Structure’.Design Manual of Timber Structure[M].3rd ed.Beijing:China Architecture&Building Press,2005.(in Chinese)
[9]樊承谋.木结构[M].北京:中国建筑工业出版社,1981.FAN Chengmou.Timber Structure[M].Beijing:ChinaArchitecture&Building Press,1981.(in Chinese)
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