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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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复杂应力条件下饱和南京细砂门槛剪应变特性
, PP. 28-32
Keywords: 饱和南京细砂,初始应力状态,门槛剪应变,空心圆柱扭剪仪,循环扭剪
Abstract:
？利用gds空心圆柱扭剪(hca)仪,对相对密度dr=50％的饱和南京细砂进行三向非均等固结条件的循环扭剪试验,研究初始主应力方向角(α0)、初始偏应力比(η0)、初始平均有效主应力(p0)和初始中主应力参数(b0)4个初始固结应力参数对门槛剪应变(γt)的影响。研究结果表明:当其余的3个初始固结应力参数不变时,γt随着任一参数η0、p0或b0的增大而增大;α0对γt的影响较大,且当α0从0°到45°的增大过程中,γt逐渐变小;当α0从45°增大到90°的过程中,γt逐渐变大;当α0≈45°时,主应力方向对γt的影响起主导作用,偏应力比的影响被弱化。
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