邯郸粉土动剪模量和阻尼比试验研究
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摘要
以邯郸地区的粉土为研究对象,在各种固结压力和相同加载周期及相同剪切应力幅值下,分别进行了室内动单剪试验,得到了该地区粉土在3种固结压力下的G/Gdmax-γ、D-γ归一化曲线以及G/Gdmax-γ和D-γ关系值。试验结果表明:G/Gdmax随动应变的增大而减小,随固结压力的增大而增大,而阻尼比D的变化规律与动剪切模量相反。所得结果可为本地区工程建筑的抗震设计提供参考。
Taking silty sand in Handan region as an object of study,the dynamic simple shear experiments indoors were performed under various consolidation pressure and same loading period and same shear stress amplitude.Through the experiments,the normalized G/Gmax-γand D-γ curves and relationship values ofG/Gdmax-γ and D-γ of silty sand in this area under three consolidation pressures were obtained The experimental results show that the value of G/Gdmaxdecreases with increase of dynamic strain,and increases with increase of the consolidation pressure,and the change rule of damping ratio D is opposite to the dynamic shear modulus.The results obtained provide a reference to seismic design of the engineering construction in this region.
Taking silty sand in Handan region as an object of study,the dynamic simple shear experiments indoors were performed under various consolidation pressure and same loading period and same shear stress amplitude.Through the experiments,the normalized G/Gmax-γand D-γ curves and relationship values ofG/Gdmax-γ and D-γ of silty sand in this area under three consolidation pressures were obtained The experimental results show that the value of G/Gdmaxdecreases with increase of dynamic strain,and increases with increase of the consolidation pressure,and the change rule of damping ratio D is opposite to the dynamic shear modulus.The results obtained provide a reference to seismic design of the engineering construction in this region.
引文
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[4]何晓民,陈志强,张婷.武汉砂土动剪模量与阻尼比的试验研究[J].世界地震工程,2010,26:41-45.He xiaomin,Chen Zhiqiang,Zhang Ting.Experimental studies on dynamic shear modulus and damping ratio of sandy soil in Wuhan[J].WorldEarthquake Engineering,2010,26:41-45.
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[6]吴世明.土动力学[M].北京:中国建筑工业出版社,2000.Wu Shiming.Sotl dynamic[M].Beijing:China building Industry Press,2000.
[7]谢定义.土动力学[M].北京:高等教育出版社,2011.Xie Dingyi.Soil Dynamic[M].Bei jing:Higher Education Press,2011.
[8]陈国兴.岩土地震工程学[M].北京:科学出版社,2007.Chen Guoxing.Geotechnical earthquake engineering[M].Beijing:Science Press,2007.
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