Abstract The energy-based method is a promising tool for evaluating soil liquefaction potential. In this study, the effects of initial deviatoric stress (qs) and cyclic stress amplitude (qcyc) on soil liquefaction potential in undrained cyclic triaxial tests were evaluated using the energy-based method. The testing results indicate that the required dissipated energy for the onset of liquefaction is influenced by both qcyc and qs for a loose sand, while it is only affected by qs for a medium-dense sand. For both loose and medium-dense sands, there exists an approximately unique relationship between the residual excess pore water pressure ratio and the normalized dissipated energy (Wn) during cyclic loadings, independent of qcyc and qs. The relationship between the double-amplitude axial strain and the Wn is influenced not only by initial conditions but also by loading conditions. The evaluation of the effects of the various factors on the liquefaction potential based on the energy-based method provides insight into the liquefaction resistance for both loose and medium-dense sands.

中文翻译：

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初始偏应力和循环应力幅对松散和中密砂岩液化潜力影响的评价：一种基于能量的方法

摘要 基于能量的方法是评估土壤液化潜力的一种很有前途的工具。在这项研究中，使用基于能量的方法评估了初始偏应力 (qs) 和循环应力幅 (qcyc) 对不排水循环三轴试验中土壤液化潜力的影响。测试结果表明，对于松散的砂，液化开始所需的耗散能量受 qcyc 和 qs 的影响，而对于中等密度的砂，它只受 qs 的影响。对于松散和中密砂，在循环载荷期间残余超孔隙水压力比和归一化耗散能 (Wn) 之间存在近似唯一的关系，与 qcyc 和 qs 无关。双振幅轴向应变与 Wn 之间的关系不仅受初始条件的影响，还受加载条件的影响。基于能量的方法评估各种因素对液化潜力的影响，可以深入了解松散和中密砂的液化阻力。