The liquefaction resistance and correction factors K_σ and K_α of Nakdong River sand obtained from cyclic triaxial (CTX) tests were compared with those determined by cyclic simple shear (CSS) tests to ascertain the importance of the reduction factor C_r and correction factors K_σ and K_α in liquefaction evaluations, especially in view of the lack of comparative liquefaction assessments based on different laboratory test apparatuses. All samples used for the comparisons were obtained from the same type of sand by using similar preparation methods and they were subjected to similar stress states to minimize the number of factors influencing the comparison results; moreover, the apparatuses used in the two tests were manufactured by the same company and all tests were conducted by a single operator. It was found that the liquefaction resistance in CTX tests was always greater than that in CSS tests. Furthermore, C_r varied from 0.63 to 0.36, and it depended on the relative density D_r and initial static shear ratio α. K_σ, which increased with the normal effective stress σ′_nc in CTX tests, was identical to K_σ observed in CSS tests when α was increased up to 0.1. By contrast, K_α in the CSS tests was 58%–97% of K_α measured in the CTX tests, and it depended on the combined effect of D_r, σ′_nc, and α. The relationship between K_α and α in both CTX and CSS tests was well represented by a parabolic function. Moreover, the differences in K_α values between the CTX and CSS tests were also found to be a parabolic function of α. This information can be used for converting CTX (or CSS) values into equivalent CSS (or CTX) values.

将循环三轴 (CTX) 试验获得的洛东河砂的液化阻力和修正系数 K _σ和 K _α与循环简单剪切 (CSS) 试验确定的值进行比较，以确定折减系数 C _r和修正系数 K的重要性_σ和 K _α在液化评估中，特别是鉴于缺乏基于不同实验室测试设备的比较液化评估。用于比较的所有样品均采用相似的制备方法从同一类型的沙子中获得，并承受相似的应力状态，以尽量减少影响比较结果的因素；此外，两次测试中使用的设备由同一家公司制造，所有测试均由一名操作员进行。发现CTX测试中的液化阻力总是大于CSS测试中的。此外，C _r从 0.63 到 0.36 不等，它取决于相对密度 D _r和初始静态剪切比 α。ķ _σ,在 CTX 测试中随着正常有效应力σ ' _nc增加，当 α 增加到 0.1 时，与CSS 测试中观察到的 K _σ相同。相反，K _α在CSS试验为58％-97的K％_α在CTX试验中测量，并且它依赖于d的组合效果_{- [R} ，σ ' _NC，和α。CTX 和 CSS 测试中K _α和 α之间的关系由抛物线函数很好地表示。此外，K _α的差异还发现 CTX 和 CSS 测试之间的值是 α 的抛物线函数。此信息可用于将 CTX（或 CSS）值转换为等效的 CSS（或 CTX）值。