VELACS - Verification of Liquefaction Analysis using Centrifuge Studies-An Extension

9423748 Lacy 这是 VELACS（离心机液化分析验证）项目的延伸，其目的是评估土壤液化分析中使用的现有数值和本构模型的相关性和有效性。 其动机是解决VELACS A级预测中遇到的困难，并找出造成这些困难的主要原因。 VELACS 表明，目前用于分析岩土结构的程序一般不适合预测土壤液化的后果。 该项目将确定一些最有前途的可用于分析土壤液化及其后果的程序。 一系列仔细进行的三轴和扭转试验将被进行和仔细检查，以提供一个小而可靠的数据库。 这些数据将用于本构模型的校准，进而用于两个离心机模型实验的 A 类预测练习。 将预测结果与实验结果进行比较，并讨论潜在差异的原因。 将进行多次可靠性检查，以找出 VELACS 项目中已考虑的实验缺乏可靠预测的原因。 ***

9423748 Lacy This is an extension to the VELACS (Verification of Liquefaction Analysis by Centrifuge Studies) project, the purpose of which was to evaluate the relevance and effectiveness of the existing numerical and constitutive models used in the analysis of soil liquefaction. The motivation is to resolve the difficulties encountered in the Class A predictions of VELACS, and to isolate the main cause of these difficulties. VELACS revealed that the current procedures used for the analysis of geotechnical structures are not suitable, in general, for predicting the consequences of soil liquefaction. Some of the most promising procedures available for the analysis of soil liquefaction and its consequences will be identified in this project. A series of carefully-performed triaxial and torsional tests are to be conducted and carefully examined, so as to provide a small but reliable data base. These data will be used for the calibration of constitutive models, which in turn will be used for a Class A prediction exercise of two centrifuge model experiments. The predictions will be compared with the experimental results, and reasons for potential discrepancies will be discussed. Multiple checks for reliability will be conducted in an effort to isolate reasons for the lack of reliable predictions of the experiments already considered in the VELACS project. ***