摘要
依据动三轴试验 ,提出 Gmax(k Pa)与 (σd/2 ) 1/2 (k Pa) 1/2成线性关系 ,并且对于不同地区的砂土 ,能够根据 emin进行初步归一 ,从而提出了适用于一般砂土的简化临界剪切波速公式 .该公式明确体现出临界剪切波速与深度、地震加速度等成 1 /4次方关系 ,采用它能够合理地解释液化可能性随深度增加而减少的现象 .通过与其他学者提出的方法以及动三轴试验结果的对比表明 。
According to the result of cyclic triaxial tests, a correlation between liquefaction resistance and elastic shear modulus is presented. It shows that G max (kPa) is in linear relation with ( σ d /2) 1/2 (kPa) 1/2 . Applying to soils from different sites, the correlation can be normalized according to its minimum void ratio. From the above results, an improved method is established to evaluate the liquefaction potential with shear wave velocity. The critical shear wave velocity of liquefaction is in linear relation with 1/4 power of depth and the maximum acceleration during earthquakes. The phenomenon that the possibility of liquefaction decreases with the increment of the depth can be explained rationally by the method proposed in this paper. Compared with previous methods and the results of cyclic triaxial tests, this method is simpler and more effective.
出处
《地震学报》
CSCD
北大核心
2000年第6期637-644,共8页
Acta Seismologica Sinica
基金
国家自然科学基金(59678020)
浙江省自然科学基金(RC9609)资助项目
关键词
液化势
剪切波速
动三轴试验
liguefaction potential
shear wave velocity
cyclic triaxial test
