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Correlation of shear wave velocity with liquefaction resistance based on laboratory tests

机译:基于实验室测试的剪切波速度与抗液化性的相关性

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摘要

According to the results of cyclic triaxial tests on Hangzhou sands, a correlation is presented between liquefaction resistance and elastic shear modulus. Material-dependent but independent of confining stress, shows the linear relation of (σ_d/2)~(1/2) with G_(max). For its application to different soils, a method proposed by Tokimatsu [Tokimatsu K, Uchida A. Correlation between liquefaction resistance and shear wave velocity. Soils Found 1990:30(2):33-42] is utilized to normalize the shear modulus with respect to minimum void ratio. A simplified equation is established to evaluate the liquefaction potential by shear-wave velocity. The critical shear-wave velocity of liquefaction is in linear relation with 1/4 power of depth and the peak horizontal ground surface acceleration during earthquakes. The equation proposed in this paper is compared with previous methods especially the procedure proposed by Andrus [RD Andrus, KH Stokoe. Liquefaction resistance of soils from shear-wave velocity. J Geotech Geoenviron Eng 2000:126(11):1015-25]. The results show its simplicity and effectiveness when applied to sands, but more validation or modification is needed for its application to sand with higher fines content.
机译:根据杭州砂土循环三轴试验的结果,提出了抗液化性与弹性剪切模量之间的关系。与材料有关但与约束应力无关,它表示(σ_d/ 2)〜(1/2)与G_(max)的线性关系。为了将其应用到不同的土壤上,由Tokimatsu提出的方法[Tokimatsu K,UchidaA。抗液化性与剪切波速之间的相关性。 1990:30(2):33-42]]用于相对于最小空隙率标准化剪切模量。建立一个简化的方程式,以通过剪切波速度评估液化势。地震过程中,液化的临界剪切波速度与深度的1/4幂和水平地面峰值加速度呈线性关系。本文提出的方程与以前的方法进行了比较,特别是与Andrus [RD Andrus,KH Stokoe]提出的过程进行了比较。剪切波速度对土壤液化的影响地球技术地质工程杂志,2000:126(11):1015-25]。结果表明,将其应用于砂土时,其简单性和有效性,但将其应用于细粉含量较高的砂岩时,还需要更多的验证或修改。

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