青岛胶州湾淤泥(质)土动力特性试验研究
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摘要
利用Hardin-Drnevich提出的动力本构关系,结合等效粘弹性介质模型,对青岛环胶州湾淤泥(质)土样进行了共振柱试验研究。对54组试验土样的试验结果进行了细致的拟合分析,试验结果表明:试验得到的规一化剪切量比Gd/Gdmax与剪切应变幅值γd的关系曲线比国内现有的相应曲线下降得缓慢,但更接近于英国Rune Dyvik和美国地质调查局的试验结果曲线;阻尼比γd与剪切应变幅值γd的关系曲线比国内现有的曲线上升要缓慢,并且最大动阻尼比值较小。最后,文中分析了产生这一现象的原因。上述试验结果和认识,对滨海软土工程场地的非线性地震响应,将会产生重要影响。
Based on the dynamic constitutive model proposed by Hardin-Drnevich and the equivalent viscoelastic model,we conducted a series of resonant column tests on the muddy soil of Qingdao Jiaozhou Bay. By fitting the data of the 54 sets of experiment,we find that: the curve of normalized shear modulus ratio Gd/ Gdamxversus the amplitude of the shear strain γddescends slowly than domestic corresponding curves but it is similar to the results of Rune Dyvik and USGS; the curve of damping ratio λdversus the amplitude of the shear strain γdalso ascend slowly than domestic ones and the maximum dynamic damping ratio is smaller. At last we analyzed the reason which caused the phenomenon. The results and the understanding will have a great impact on the nonlinear response of soft site in coastal region.
Based on the dynamic constitutive model proposed by Hardin-Drnevich and the equivalent viscoelastic model,we conducted a series of resonant column tests on the muddy soil of Qingdao Jiaozhou Bay. By fitting the data of the 54 sets of experiment,we find that: the curve of normalized shear modulus ratio Gd/ Gdamxversus the amplitude of the shear strain γddescends slowly than domestic corresponding curves but it is similar to the results of Rune Dyvik and USGS; the curve of damping ratio λdversus the amplitude of the shear strain γdalso ascend slowly than domestic ones and the maximum dynamic damping ratio is smaller. At last we analyzed the reason which caused the phenomenon. The results and the understanding will have a great impact on the nonlinear response of soft site in coastal region.
引文
[1]山东省省情资料库编写组.山东省省情资料库[DB].青岛市志.海洋志,第五章海湾第一节胶州湾[2013.02.02].http://sd.infobase.gov.cn/bin/mse.exe?seachword=&K=b2&A=4&rec=19&run=13
[2]KENJI ISHIHARA.Soil Behavior in Earthquake Geotechnics[M].New York:CLARENDON PRESS·OXFORD,2003,127-150.
[3]孙静,袁晓铭.土的动模量和阻尼比研究评述[J].世界地震工程,2003,19(3):88-95.SUN Jing,YUAN Xiao-ming.A state-of-art of research on dynamic modulus and damping ratio of soils[J].WORLD EARTHQUAKE ENGINEERING,2003,19(3):88-95.(in Chinese)
[4]张克绪,谢君斐.土动力学[M].北京:地震出版社,1988,28-29.ZHANG Ke-xu,XIE Jun-fei,Soil Dynamics[M].Beijing:EARTHQUAKE PRESS,1988,28-29.(in Chinese)
[5]中国地震局.DB001—94《工程场地地震安全性评价工作规范》[S].北京:地震出版社,1994
[6]袁晓铭,孙锐,孙静,孟上九,石兆吉.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.YUAN Xiao-ming,SUN Rui,SUN Jing,MENG Shang-jiu,SHI Zhao-ji.Study of dynamic shear modulus and damping of conventional types of soils[J].EARTHQUAKE ENGINEEERING AND ENGINEERING VIBRATION,2000,20(4):133-139.(in Chinese)
[7]陈国兴,谢君斐,张克绪.土的动模量和阻尼比的经验估计[J].地震工程与工程振动,1995,15(1):73-84.CHEN Guo-xing,XIE Jun-fei,ZHANG Ke-xu.Empirical estimates of dynamic modulus and damping of soils[J].EARTHQUAKE ENGINEEERING AND ENGINEERING VIBRATION,1995,15(1):73-84.(in Chinese)
[8]战吉艳,陈国兴,杨伟林,胡庆兴.苏州第四纪沉积土动剪切模量比和阻尼比试验研究[J].岩土工程学,2012,34(3):559-566.ZHAN Ji-yan,CHEN Guo-xing,YANG Wei-lin,HUQing-Xing.Experimental study on dynamic shear modulus ratio and damping ratio of Suzhou quaternary sedimentary soil[J].Chinese Journal of Geotechnical Engineering,2012,34(3):559-566.
[9]Harry E.Stewart,Ashraf K.Hussein.Determination of the dynamic shear modulus of Holocene bay mud for site-response analysis[C].//Thomas D.O’Rourke.The Loma Prieta,California,Earthquake of October 17,1989-Marrina District,Washing Ton:United States Government Printing Office,1992:75-83
[10]Rune Dyvik.Understanding the Measurement of Soil Dynamic Properties-Resonant Column Tests[C].Imperial College,London.2010:25.
[2]KENJI ISHIHARA.Soil Behavior in Earthquake Geotechnics[M].New York:CLARENDON PRESS·OXFORD,2003,127-150.
[3]孙静,袁晓铭.土的动模量和阻尼比研究评述[J].世界地震工程,2003,19(3):88-95.SUN Jing,YUAN Xiao-ming.A state-of-art of research on dynamic modulus and damping ratio of soils[J].WORLD EARTHQUAKE ENGINEERING,2003,19(3):88-95.(in Chinese)
[4]张克绪,谢君斐.土动力学[M].北京:地震出版社,1988,28-29.ZHANG Ke-xu,XIE Jun-fei,Soil Dynamics[M].Beijing:EARTHQUAKE PRESS,1988,28-29.(in Chinese)
[5]中国地震局.DB001—94《工程场地地震安全性评价工作规范》[S].北京:地震出版社,1994
[6]袁晓铭,孙锐,孙静,孟上九,石兆吉.常规土类动剪切模量比和阻尼比试验研究[J].地震工程与工程振动,2000,20(4):133-139.YUAN Xiao-ming,SUN Rui,SUN Jing,MENG Shang-jiu,SHI Zhao-ji.Study of dynamic shear modulus and damping of conventional types of soils[J].EARTHQUAKE ENGINEEERING AND ENGINEERING VIBRATION,2000,20(4):133-139.(in Chinese)
[7]陈国兴,谢君斐,张克绪.土的动模量和阻尼比的经验估计[J].地震工程与工程振动,1995,15(1):73-84.CHEN Guo-xing,XIE Jun-fei,ZHANG Ke-xu.Empirical estimates of dynamic modulus and damping of soils[J].EARTHQUAKE ENGINEEERING AND ENGINEERING VIBRATION,1995,15(1):73-84.(in Chinese)
[8]战吉艳,陈国兴,杨伟林,胡庆兴.苏州第四纪沉积土动剪切模量比和阻尼比试验研究[J].岩土工程学,2012,34(3):559-566.ZHAN Ji-yan,CHEN Guo-xing,YANG Wei-lin,HUQing-Xing.Experimental study on dynamic shear modulus ratio and damping ratio of Suzhou quaternary sedimentary soil[J].Chinese Journal of Geotechnical Engineering,2012,34(3):559-566.
[9]Harry E.Stewart,Ashraf K.Hussein.Determination of the dynamic shear modulus of Holocene bay mud for site-response analysis[C].//Thomas D.O’Rourke.The Loma Prieta,California,Earthquake of October 17,1989-Marrina District,Washing Ton:United States Government Printing Office,1992:75-83
[10]Rune Dyvik.Understanding the Measurement of Soil Dynamic Properties-Resonant Column Tests[C].Imperial College,London.2010:25.
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