侧脚对木结构古建筑抗震性能的影响
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摘要
为了研究木结构古建筑侧脚的结构作用,首先从力学角度分析了侧脚的抗震机理;而后根据七檩大式殿堂的真实结构特点,建立了有侧脚和无侧脚七檩大式殿堂的有限元模型,对其进行了弹塑性动力分析,得到了檐柱柱头加速度、位移及柱根轴力的地震响应曲线,结果表明木结构古建筑设置侧脚后檐柱柱头加速度峰值、位移峰值以及檐柱轴压力峰值均有不同程度的减小,从而定量的说明了侧脚的结构作用。
In order to study the structural effects of Chinese historical timber buildings with lateral foots,first,the isolation mechanism of the lateral foots is analyzed in the view of mechanics,then,the FEM models of the structures with and without the lateral foots are built based on the real characters of a timber frame palace with seven purlins.At the same time,the elasto-plastic dynam analysis is made to obtain the acceleration and displacement of the head of eaves-columns and the earthquake response curves of axial force of the column root.The results show that the peaks of the acceleration,displacement and axial force would decrease in varying degrees after setting the lateral foots,which could illustrate the structural effects of the lateral foots quantitatively.
In order to study the structural effects of Chinese historical timber buildings with lateral foots,first,the isolation mechanism of the lateral foots is analyzed in the view of mechanics,then,the FEM models of the structures with and without the lateral foots are built based on the real characters of a timber frame palace with seven purlins.At the same time,the elasto-plastic dynam analysis is made to obtain the acceleration and displacement of the head of eaves-columns and the earthquake response curves of axial force of the column root.The results show that the peaks of the acceleration,displacement and axial force would decrease in varying degrees after setting the lateral foots,which could illustrate the structural effects of the lateral foots quantitatively.
引文
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[2]郭华瑜.明代官式建筑大木作研究[D].南京:东南大学,2001:20-25.
[3]张鹏程.中国古代木构建筑结构及其抗震发展研究[D].西安:西安建筑科技大学,2003:70-71.
[4]赵均海.中国古代建筑结构特性研究[M].武汉:武汉工业大学出版社,1999:39-41.
[5]李小伟.清代大式殿堂体系弹塑性分析及基于性能的抗震性能评估[D].西安:长安大学,2006:43-46.
[6]李小伟.侧脚与斗拱对清代九檩大式殿堂动力性能的影响[J].世界地震工程,2009,25(3):145-149.
[7]周乾.中国古建筑动力特性及地震反应[J].北京工业大学学报,2010,36(1):13-17.
[2]郭华瑜.明代官式建筑大木作研究[D].南京:东南大学,2001:20-25.
[3]张鹏程.中国古代木构建筑结构及其抗震发展研究[D].西安:西安建筑科技大学,2003:70-71.
[4]赵均海.中国古代建筑结构特性研究[M].武汉:武汉工业大学出版社,1999:39-41.
[5]李小伟.清代大式殿堂体系弹塑性分析及基于性能的抗震性能评估[D].西安:长安大学,2006:43-46.
[6]李小伟.侧脚与斗拱对清代九檩大式殿堂动力性能的影响[J].世界地震工程,2009,25(3):145-149.
[7]周乾.中国古建筑动力特性及地震反应[J].北京工业大学学报,2010,36(1):13-17.
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