上海软土动剪切模量衰减规律的试验研究
发布时间:2019-06-03 14:41
【摘要】:为了获得上海软土在循环动力荷载作用下的动力特性,特别是动剪切模量的衰减规律,采用原状第4层上海软土进行等向固结不排水动三轴试验,分析了加载频率和动应力比(σd/2σ s)对动剪切模量的影响。试验结果表明,对于上海第4层软土,动应力比达到0.2时,土样才发生破坏;土样的剪切模量-累积轴应变曲线不受加载频率和动应力比的影响;剪切模量的衰减下降主要发生在轴应变0~1%区间。最后提出了一个描述剪切模量衰减规律的数学模型。
[Abstract]:In order to obtain the dynamic characteristics of Shanghai soft soil under cyclic dynamic load, especially the attenuation law of dynamic shear modulus, the isoconsolidation undrained dynamic triaxial test of Shanghai soft soil was carried out in the fourth layer of Shanghai soft soil. The effects of loading frequency and dynamic stress ratio (蟽 d 鈮,
本文编号:2492005
[Abstract]:In order to obtain the dynamic characteristics of Shanghai soft soil under cyclic dynamic load, especially the attenuation law of dynamic shear modulus, the isoconsolidation undrained dynamic triaxial test of Shanghai soft soil was carried out in the fourth layer of Shanghai soft soil. The effects of loading frequency and dynamic stress ratio (蟽 d 鈮,
本文编号:2492005
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