A New Assessment of Liquefaction Potential Based on the Dynamic Test

진동시험에 기초한 액상화 상세예측법 개발

  • Kim, Soo-Il (School of Civil and Environmental Engineering, Yonsei University) ;
  • Choi, Jae-Soon (Civil Engineering Research Institute, Yonsei University) ;
  • Kang, Han-Soo (School of Civil & Environmental Engineering, Yonsei University)
  • 김수일 (연세대학교 사회환경시스템공학부) ;
  • 최재순 (연세대학교 건설공학연구소) ;
  • 강한수 (연세대학교 사회환경시스템공학부)
  • Published : 2004.03.25

Abstract

When some enormous earthquake hazards broke out in the neighboring Japan and Taiwan, many Korean earthquake engineers thought that seismic guidelines must be adjusted safely and economically to consider the moderate earthquake characteristics. In the present aseismic guideline for liquefaction potential assessment, a simplified method using SPT-N value and a detail method based on the dynamic lab-tests were introduced. However, it is said that these methods based on the equivalent stress concept to simplify an irregular earthquake are not reliable to simulate the kaleidoscopical characteristics of earthquake loading correctly. Especially, even though various data from the dynamic lab-test can be obtained, only two data, a maximum cyclic load and a number of cycle at an initial liquefaction are used to determine the soil resistance strength in the detailed method. In this study, a new assessment of liquefaction potential is proposed and verified. In the proposed assessment, various data from dynamic lab-tests are used to determine the unique soil resistance characteristic and a site specific analysis is introduced to analyze the irregular earthquake time history itself. Also, it is found that the proposed assessment is reasonable because it is devised to reflect the changeable soil behavior under dynamic loadings resulted from the generation and development of excess pore water pressure.

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