【摘要】 为高效地进行砂土液化的预测,运用逐步判别法,从8个液化影响因子中选择平均粒径、烈度、震中距等3个判别能力显著的影响因子,建立判别函数,并利用工程实例进行验证。研究结果表明:逐步判别分析模型预测性能良好,且能有效地选择对砂土液化起主导作用的因子。相比距离判别分析,逐步判别分析建立的判别函数更加稳定,且所需测试因子较少,节省了因试验和现场调查所耗费的大量人力、物力和时间,因此逐步判别分析是一种值得推广的砂土液化预测方法。更多还原

【Abstract】 In order to analyze sand liquefaction problem efficiently, the stepwise discriminant method was applied to its prediction; the factors with significant discriminant ability were selected to establish discriminant function. A number of site cases were used to verify its validity and accuracy. The results show that: stepwise discriminant analysis model has excellent liquefaction predicting performance; and it can choose effective factors which play a leading role in sand liquefaction. Compared to the distance discriminant analysis, discriminant function based on stepwise discriminant analysis is more stable; and fewer factors investigated or tested are needed, which saves human and material resources for the project construction. Thus it is worthwhile to apply stepwise discriminant analysis to liquefaction prediction widely.更多还原