基于摩擦-剪切耗能的斗栱有限元模型研究
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摘要
以应县木塔中的典型斗栱为研究对象,依据试验模型的力学参数,通过对斗栱结构构造的简化,提出了基于摩擦-剪切耗能的有限元模型。该有限元模型采用三维实体单元构建,以空间牛腿结构的方式体现斗栱的构造连接和传递荷载的基本特征,在斗与栱的接触面设置摩擦接触对以实施构件摩擦-剪切耗能的基本功能。运用ANSYS软件构建了典型斗栱的有限元模型,并分别模拟了实体模型在竖向荷载以及竖向荷载与水平荷载共同作用下的试验过程。模拟分析结果表明,该有限元模型具有较好的摩擦-剪切模拟功能,可反映斗栱在竖向荷载和水平荷载共同作用下的力学特性。
This research selected the typical corbel bracket sets(Dou-Gong) in Yingxian timber pagoda as the investigating object and considered the mechanical parameters extracted from physical model test results and simplified structural configurations to propose the FE model of Dou-Gong based on energy dissipation with friction and shear.The FE model was constructed by three-dimensional solid elements.The space bracket structure was adopted to reflect the connection configurations and the basic characteristics of load transfer.The contact-target pair was set on the interface between Dou(block) and Gong(bracket) to carry out the function of energy dissipation by friction and shear.A finite model of typical Dou-Gong was constructed by program ANSYS,and the test processes of the physical model under the vertical load and horizontal load were simulated respectively.The analysis results indicate that this FE model can perfectly simulate friction-shear action,and is effectively to describe the mechanical behavior of the Dou-Gong under the action of vertical load together with horizontal load.
This research selected the typical corbel bracket sets(Dou-Gong) in Yingxian timber pagoda as the investigating object and considered the mechanical parameters extracted from physical model test results and simplified structural configurations to propose the FE model of Dou-Gong based on energy dissipation with friction and shear.The FE model was constructed by three-dimensional solid elements.The space bracket structure was adopted to reflect the connection configurations and the basic characteristics of load transfer.The contact-target pair was set on the interface between Dou(block) and Gong(bracket) to carry out the function of energy dissipation by friction and shear.A finite model of typical Dou-Gong was constructed by program ANSYS,and the test processes of the physical model under the vertical load and horizontal load were simulated respectively.The analysis results indicate that this FE model can perfectly simulate friction-shear action,and is effectively to describe the mechanical behavior of the Dou-Gong under the action of vertical load together with horizontal load.
引文
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[8]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,ZhangPengcheng.Study on the seismic behaviors of Chineseancient wooden building by shaking table tese[J].China Civil Engineering Journal,2004,37(6):6-11.(in Chinese))
[9]袁建力,陈韦,王珏,等.应县木塔斗栱模型试验研究[J].建筑结构学报,2011,32(7):66-72.(YUANJianli,CHEN Wei,WANG Jue,et al.Experimentalresearch on dougong models of Yingxian Timber Pagoda[J].Journal of Building Structures,2011,32(7):66-72.(in Chinese))
[10]徐伯安.中国大百科全书:建筑:斗栱[M].北京:中国大百科全书出版社,1988:117-120.
[11]陈明达.应县木塔[M].北京:文物出版社,2001:44-49.
[2]D’Ayala Dina,Tsai Pin Hui.Seismic vulnerability ofhistoric Dieh-Dou timber structures in Taiwan[J].Engineering Structures,2008,30:2101-2113.
[3]张舵,卢芳云.木结构古塔的动力特性分析[J].工程力学,2004,21(1):81-86.(ZHANG Duo,LUFangyun.Dynamic structural characteristics of anancient timber tower[J].Engineering mechanics,2004,21(1):81-86.(in Chinese))
[4]Che A L,He Y,Ge X R,et al.Study on the dynamicstructural characteristics of an ancient timber:Yingxianwooden pagoda[C]//ASCE Proceedings of Sessions ofGEO Shanghai.Reston,VA:ASCE,2006:390-396.
[5]王珏.应县木塔扭、倾变形张拉复位的数字化模拟和安全性评价[D].扬州:扬州大学,2008:31-38.(WANG Jue.The numerical simulation and securityappraisal of tensioning-replacement method for torsionaland inclined deformation of Yingxian Wooden Tower[D].Yangzhou:Yangzhou University,2008:31-38.(in Chinese))
[6]陈韦.应县木塔斗栱力学性能及简化分析模型的研究[D].扬州:扬州大学,2010:19-34.(CHEN Wei.Mechanical property and simplified analysis model ofDougong of Yingxian Wooden Tower[D].Yangzhou:Yangzhou University,2010:19-34.(in Chinese))
[7]张鹏程,赵鸿铁,薛建阳,等.斗栱结构功能试验研究[J].世界地震工程,2003,19(1):102-106.(ZHANG Pengcheng,ZHAO Hongtie,XUE Jianyang,et al.Experiment research on structural performance ofDougong[J].World Earthquake Engineering,2003,19(1):102-106.(in Chinese))
[8]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,ZhangPengcheng.Study on the seismic behaviors of Chineseancient wooden building by shaking table tese[J].China Civil Engineering Journal,2004,37(6):6-11.(in Chinese))
[9]袁建力,陈韦,王珏,等.应县木塔斗栱模型试验研究[J].建筑结构学报,2011,32(7):66-72.(YUANJianli,CHEN Wei,WANG Jue,et al.Experimentalresearch on dougong models of Yingxian Timber Pagoda[J].Journal of Building Structures,2011,32(7):66-72.(in Chinese))
[10]徐伯安.中国大百科全书:建筑:斗栱[M].北京:中国大百科全书出版社,1988:117-120.
[11]陈明达.应县木塔[M].北京:文物出版社,2001:44-49.
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