Kostadinov与Yamazaki液化识别方法的可行性剖析

英文篇名：Feasibility analysis of Kostadinov and Yamazaki liquefaction detection method
中文刊名：地震工程与工程振动
英文刊名：Journal of Earthquake Engineering and Engineering Vibration
作者：唐福辉 ; 孙锐 ; 陈龙伟
英文作者：TANG Fuhui ; SUN Rui ; CHEN Longwei(Institution of Engineering Mechanics ; CEA ; Harbin 150080 ; China)
中文关键词：液化识别 ; Kostadinov与Yamazaki方法 ; 液化场地 ; 软土场地
英文关键词：liquefaction detection ; method of Kostadinov and Yamazaki ; liquefied sites ; soft sites
出版日期：2011-02-15
机构：中国地震局工程力学研究所;
年：2011
期：01
出版单位：地震工程与工程振动

摘要

研究具有代表性的Kostadinov and Yamazaki液化识别方法的可行性,特别是对软土和液化场地的识别能力。选择包含了13个软土场地的52个场地实际地震纪录,分析结果表明,该方法识别成功率随场地类别变软而显著降低,对中硬、中软和软土非液化场地成功率分别为100%、70.6%和46.2%,对液化场地成功率为62%,对软土和液化场地会出现明显误判。方法中起控制作用的是平均瞬时频率MIF,能很好识别非液化的中硬场地,但难以区分软土场地和液化场地;混淆软土和液化场地的原因是采用平均瞬时频率MIF为绝对量,不符合液化对场地地震动影响的物理本质,建议采用相对量,可能会有好的效果。
Feasibility of the Kostadinov and Yamazaki liquefaction detection method is analyzed,especially for detecting soft sites and liquefied sites.Fifty-two actual seismic records that include thirteen non-liquefied soft sites are chosen.The analysis results show that the success rate of the method to identify non-liquefied medium hard,medium soft and soft sites are 100%,70.6% and 46.2% respectively,and the success rate to identify liquefied sites is 62%.Obviously,the method misjudges soft sites and liquefied sites.The control parameter of the method is mean instantaneous frequency(MIF) which can well recognise non-liquefied hard sites,but can not distinguish non-liquefied soft sites and liquefied sites.Since MIF is an absolute value and incapable of capturing the physical nature of ground motion influence caused by liquefaction,a relative parameter is suggested and may be of better effect.

引文

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