穿斗式木构架结构与轻型木结构抗震性能振动台试验研究
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摘要
通过1∶2比例穿斗式木构架结构和轻型木结构模型的振动台试验,对这两种结构的抗震性能进行了研究。结果表明:穿斗式木构架在峰值加速度在0～0.5g的地震激励下,柱顶水平加速度反应会减小,动力放大系数在0.46～0.57之间,柱顶位移会增大,在输入峰值加速度大于0.4g后,柱与础石之间会产生较大的滑移,卯榫节点也会产生较大变形,从而耗散大量的地震能量,使得该结构具有明显的减震效果;轻型木结构模型则在峰值加速度大于0.4g地震激励下,柱顶加速度动力放大系数大于1,且轻型木结构模型在峰值加速度0.5g地震激励下,仍处于弹性状态。
By shaking table tests of two 1∶ 2 scaled prototype structures,the seismic performance of Chinese traditional wood building and light wood framed building were studied.The results show that under the horizontal earthquake action whose peak value is less than 0.5g,the horizontal acceleration responses at the top of columns of Chinese traditional wood building can be less than the acceleration input.The dynamic magnification factor of acceleration ranges from 0.46 to 0.57.The corresponding displacements can be larger than the displacement input.When the peak value of the input acceleration is bigger than 0.4g,the obvious slippage between the columns and base-stones,as well as the deflection of joints connecting beams and columns will appear.As the result,the energy of the earthquake can be dissipated and the excellent effect of shock absorption can be achieved.Furthermore,for the light wood framed building,when the peak value of the input acceleration is bigger than 0.4g,the dynamic magnification factor of acceleration can be bigger than 1.0.And if the peak value of input acceleration is not more than 0.5g,the light wood framed building can remain elastic.
By shaking table tests of two 1∶ 2 scaled prototype structures,the seismic performance of Chinese traditional wood building and light wood framed building were studied.The results show that under the horizontal earthquake action whose peak value is less than 0.5g,the horizontal acceleration responses at the top of columns of Chinese traditional wood building can be less than the acceleration input.The dynamic magnification factor of acceleration ranges from 0.46 to 0.57.The corresponding displacements can be larger than the displacement input.When the peak value of the input acceleration is bigger than 0.4g,the obvious slippage between the columns and base-stones,as well as the deflection of joints connecting beams and columns will appear.As the result,the energy of the earthquake can be dissipated and the excellent effect of shock absorption can be achieved.Furthermore,for the light wood framed building,when the peak value of the input acceleration is bigger than 0.4g,the dynamic magnification factor of acceleration can be bigger than 1.0.And if the peak value of input acceleration is not more than 0.5g,the light wood framed building can remain elastic.
引文
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[3]Filiatrault A,Christovasilis P,Wanitkorkul A,JohnW.Experimental seismic response of a full-scale light-frame wood building[J].Journal of StructuralEngineering,ASCE,2010,136(3):246-254.
[4]Suzuki Takashi,Kurakata Masayuki,Izuno Kazuyuki,et al.Effect of stage on earthquake response of aJapanese traditional wooden structure[J].Journal ofJapan Association for Earthquake Engineering,2007,7(5):15-30.
[5]吕西林,程海江,卢文胜,倪春.两层轻型木结构足尺房屋模型模拟地震振动台试验研究[J].土木工程学报,2007,40(10):41-49.(Lu Xilin,ChenHaijiang,Lu Wensheng,Ni Chun.Shake table tests ofa two-storey light wood framed house[J].China CivilEngineering Journal,2007,40(10):41-49.(inChinese))
[6]熊海贝,倪春,吕西林,贾国成.三层轻木-混凝土混合结构足尺模型模拟地震振动台试验研究[J].地震工程与工程振动,2008,28(1):91-98.(XiongHaibei,Ni Chun,Lu Xilin,Jia Guocheng.Shakingtable tests on 3-storey wood-concrete hybrid structure[J].Journal of Earthquake Engineering andEngineering Vibration,2008,28(1):91-98.(inChinese))
[7]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))
[8]葛学礼,朱立新,王亚勇,等.村镇建筑震害与抗震技术措施[J].工程抗震,2001,2(1):43-48.(GeXueli,Zhu Lixin,Wang Yayong,et al.Earthquakedisaste of buildings in villages and towns and technicalprotective measures[J].China Earthquake ResistantEngineering,2001,2(1):43-48.(in Chinese))
[9]GB50005—2003木结构设计规范[S].北京:中国建筑工业出版社,2003.(GB50005—2003Code fordesign of timber structures[S].Beijing:ChinaArchitecture&Building Press,2003.(in Chinese))
[10]GB50011—2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.(GB50011—2010Codefor seismic design of buildings[S].Beijing:ChinaArchitecture&Building Press,2010.(in Chinese))
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