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.
出处
《世界地震工程》
CSCD
北大核心
2014年第4期261-268,共8页
World Earthquake Engineering
