古代殿堂式木结构建筑模型振动台试验研究
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摘要
对按照《营造法式》制作的古代殿堂式木结构建筑心间缩尺模型进行了模拟振动台试验研究。选用E l Centro波、Taft波、兰州波作为输入地震动。测量了台面、柱脚、柱头、木梁的位移和加速度响应。对模型的破坏形态、自振周期、阻尼比、动力响应、滞回耗能进行了分析。试验结果表明:自振周期T的变化范围为0.48~0.67s,阻尼比ξ的变化范围为0.029~0.046,模型的自振周期和阻尼比随着地震加速度的增强而增大;模型的动力放大系数β<1,且随着地震加速度的增强而减小;铺作层、柱础层都是通过摩擦滑移来耗能,柱架榫卯节点的耗能能力最强,在模型的耗能、减震中起着主要作用。
An intermediate bay model of an ancient palace was made according to Fabrication Methods of the Song dynasty,on which the shaking table test was carried out.El Centro,Taft and Lanzhou waves were chosen as input seismic excitations.The displacement and acceleration responses of the shaking table,column ends,column upper and beam under different levels of earthquake excitation were measured.The failure mode,natural period,damping ratio,dynamic responses,and hysteretic energy dissipation performance were analyzed.Test results indicate that the range of natural period T is 0.48～0.67s and the damping ratio ξ is 0.029～0.046.The first period and damping ratio of the model increase along with the increasing seismic excitations.The dynamic magnification factor β is less than 1 and decreases as the input seismic excitations increase.The dougong layer and column base dissipate seismic energy by means of frictional slippage.The mortise-tenon joint of the frame has the largest energy dissipation capacity,playing an important role in shock absorption.
An intermediate bay model of an ancient palace was made according to Fabrication Methods of the Song dynasty,on which the shaking table test was carried out.El Centro,Taft and Lanzhou waves were chosen as input seismic excitations.The displacement and acceleration responses of the shaking table,column ends,column upper and beam under different levels of earthquake excitation were measured.The failure mode,natural period,damping ratio,dynamic responses,and hysteretic energy dissipation performance were analyzed.Test results indicate that the range of natural period T is 0.48～0.67s and the damping ratio ξ is 0.029～0.046.The first period and damping ratio of the model increase along with the increasing seismic excitations.The dynamic magnification factor β is less than 1 and decreases as the input seismic excitations increase.The dougong layer and column base dissipate seismic energy by means of frictional slippage.The mortise-tenon joint of the frame has the largest energy dissipation capacity,playing an important role in shock absorption.
引文
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[3]薛建阳,张鹏程,赵鸿铁.古建木结构抗震机理的探讨[J].西安建筑科技大学学报:自然科学版,2000,32(1):8-11.(Xue Jianyang,Zhang Pengcheng,Zhao Hongtie.Study on the aseismic mechanism ofhistoric timber structural building[J].Journal of Xi anUniversity of Architecture&Technology:NaturalScience Edition,2000,32(1):8-11.(in Chinese))
[4]张鹏程,赵鸿铁,薛建阳,等.中国古建筑的防震思想[J].世界地震工程,2001,17(4):1-6.(ZhangPengcheng,Zhao Hongtie,Xue Jianyang,et al.Thoughts of earthquake resistance in Chinese ancientbuildings[J].World Earthquake Engineering,2001,17(4):1-6.(in Chinese))
[5]张文芳,李世温,程文瀼.一类斗栱木结构恢复力特性的模型试验研究[J].东南大学学报:自然科学版,1997,27(增1):65-70.(Zhang Wenfang,LiShiwen,Cheng Wenrang.Experimental research onrestoring force of wooden-structures with Dou-shapedarch nodes[J].Journal of Southeast University:NaturalScience Edition,1997,27(S1):65-70.(in Chinese))
[6]高大峰,赵鸿铁,薛建阳,等.中国古建木构架在水平反复荷载作用下的试验研究[J].西安建筑科技大学学报:自然科学版,2002,34(4):317-319.(GaoDafeng,Zhao Hongtie,Xue Jianyang,et al.Experimental study on the behavior of wooden frame ofancient Chinese ancient buildings under horizontallyreverse load[J].Journal of Xi an University ofArchitecture&Technology:Natural Science Edition,2002,34(4):317-319.(in Chinese))
[7]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.Experimentalstudies on the characteristic of moritise-tenon joint inhistoric timber buildings[J].Engineering Mechanics,2006,23(10):168-173.(in Chinese))
[8]张鹏程,赵鸿铁,薛建阳,等.中国古代大木作结构振动台试验研究[J].世界地震工程,2002,18(4):35-41.(Zhang Pengcheng,Zhao Hongtie,XueJianyang,et al.Shaking table test on building modelsof Chinese ancient timber structure[J].WorldEarthquake Engineering,2002,18(4):35-41.(inChinese))
[9]李诫(宋).营造法式[M].上海:商务印书馆,1954.
[10]梁思成.梁思成全集.第七卷[M].北京:中国建筑工业出版社,2001.
[11]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 test[J].China Civil Engineering Journal,2004,37(6):6-11.(in Chinese))
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