【摘要】：為了獲得上海軟土在循環(huán)動力荷載作用下的動力特性,特別是動剪切模量的衰減規(guī)律,采用原狀第4層上海軟土進行等向固結(jié)不排水動三軸試驗,分析了加載頻率和動應力比(σd/2σ s)對動剪切模量的影響。試驗結(jié)果表明,對于上海第4層軟土,動應力比達到0.2時,土樣才發(fā)生破壞;土樣的剪切模量-累積軸應變曲線不受加載頻率和動應力比的影響;剪切模量的衰減下降主要發(fā)生在軸應變0~1%區(qū)間。最后提出了一個描述剪切模量衰減規(guī)律的數(shù)學模型。
[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，

本文編號：2492005