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Study on Reliability-Based Procedure for Evaluating Liquefaction Potential

Author: CaoZhenZhong
Tutor: YuanXiaoMing
School: China Seismological Bureau, Institute of Engineering Mechanics
Course: Geotechnical Engineering
Keywords: Sand Liquefaction Discrimination method Reliability Seismic Code Probability
CLC: TU435
Type: Master's thesis
Year: 2006
Downloads: 336
Quote: 11
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Abstract

Has a typical phenomenon of liquefaction damage in the earthquakes of the last century, Niigata, Xingtai, Haicheng, Tangshan, Alaska, Hanshin, Chichi and abroad. A series of questions liquefaction increasingly concerned about the seismic design of the first to address is whether the sand under a given earthquake liquefaction problems, so the sand liquefaction predicted global Earthquake Engineering Research important issue. After forty years of field studies and laboratory tests at home and abroad to achieve greater results and progress on Liquefaction Prediction appear discrimination method based on different indicators of uncertainty. To date, the liquefaction mechanism and influencing factors yet to fully understand and master the discriminant method are used in engineering experience means and intuitive method. And solve engineering site liquefied problem. With the rapid development of engineering construction, Liquefaction requirements not only to answer whether the venues will be liquefied, but also given the liquefaction of the reliability analysis results. Explore the reliability theory Liquefaction, is only just beginning, as well as many of the key issues to be resolved. This paper work and achievements include: discussed sand liquefaction mechanism, influencing factors, summed up the recent years, several large earthquake liquefaction research on international new results, analysis of the problems, made some new understanding. Summarizes the typical domestic and foreign uncertainty Liquefaction and artificial intelligence and expert systems Liquefaction were summarized, and pointed out that the existence of the problem and the need to improve the place, get some new understanding. 3. Elaborate a general theory of reliability analysis, refining the key issues encountered when applied to sand liquefaction potential. Research directly based liquefied-site survey data to establish a new method of liquefaction occurrence probability, discrete back sentenced to the success rate and the success rate is analyzed, and compared with the existing norms. Depth study of seismic code Liquefaction reliability issues, raised the probability of liquefaction analysis results. Included in the reliability analysis of the domestic success rate back to check their sentence, Taiwan Chi-Chi earthquake liquefaction prediction success rate, the ratio of SPT liquefaction probability relations degree of dispersion, checks, and regulating their own conservative degree of judgment.

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