Modelunc ertainty of simplified methods for assessing liquefaction potential of soils

• Main Authors: Bo-Yi L, 李柏毅
• Other Authors: Jin-Hung Hwang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/95899298721856220423

碩士 === 國立中央大學 === 土木工程研究所 === 99 === Many simpilified methods for assessing liquefaction potential have been proposed by scholars around the world. These simpilified methods are based on SPT-N, CPT-qc and VS parameters from different in-situ tests. The result of analysis and the development background among these simpilified methods are different. Thus, it’s very important to understand if these simpilified methods are suitable to the earthquake enviroment and geology condition in Taiwan. This research collects a lot of case data from the 1999 Chi-Chi earthquake in Taiwan. There are totally 303 sets of SPT-N data, 135 sets of CPT-qc data and 75 sets of VS data on liquefaction and non-liquefaction case histories. This study combines reliability analysis and Bayes’ theorem to study the accurancy and characteristics of these different methods. The advantage of this analysis method is that it can quantify the uncertainty and accurancy of these simpilified methods by probability concept. In this research, a simpilified method (HBF method) is proposed owing to its formula having clear physical meaning and simple parameters. The analysis results show that the HBF method has high accurancy and easy to use. Thus, the HBF method is recommended to be used by engineers in Taiwan.