简化的地基液化可靠性评价
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摘要
合理假定地震液化效应的不确定性主要来源于地面最大水平加速度,借用中国华北地区地震动加速度衰减关系量化CSR的变异性,结合对地震液化现场案例的统计分析构建CSR的概率密度函数;同时,以世界范围内19次中强震106个场地的CPT液化案例为基础,通过LOGISTIC方法构建不同概率水平时的地基抗液化强度CRR强度曲线,并以此导出CRR的概率密度函数;进而通过一次二阶矩法构建地基液化可靠性评价模型,同时导出地基液化概率函数,便于工程应用。工程实例与理论对比分析均表明,评价方法简洁可行、评价结果合理,可作为规范方法的有益参考。
In the sense that the horizontal peak ground is the dominant factor producing the CSR variation,the empirical acceleration attenuation law in Northern China area is employed to deduce the PDF and the statistics for CSR based on the statistic analysis of the cone penetration test data from 19 strong earthquakes liquefaction site around the world.Through logistic model,based on the above data from liquefaction site,the CRR curves with various liquefaction probabilities are developed,and consequently the PDF for CRR is also deduced according to the CRR curves.Then,the first order and second moment method is employed to establish a reliability-based evaluation of liquefaction model.Furthermore,in order to be conveniently applied in the engineering practice liquefaction probability function is founded.Through theoretical and contractive analyses on a representative sample,the estimation veracity of the developed CPT model goes near to the engineering examples which indicate the reliability and the simplicity of the method.Thus,it can be used as a significant supplement of the code.
In the sense that the horizontal peak ground is the dominant factor producing the CSR variation,the empirical acceleration attenuation law in Northern China area is employed to deduce the PDF and the statistics for CSR based on the statistic analysis of the cone penetration test data from 19 strong earthquakes liquefaction site around the world.Through logistic model,based on the above data from liquefaction site,the CRR curves with various liquefaction probabilities are developed,and consequently the PDF for CRR is also deduced according to the CRR curves.Then,the first order and second moment method is employed to establish a reliability-based evaluation of liquefaction model.Furthermore,in order to be conveniently applied in the engineering practice liquefaction probability function is founded.Through theoretical and contractive analyses on a representative sample,the estimation veracity of the developed CPT model goes near to the engineering examples which indicate the reliability and the simplicity of the method.Thus,it can be used as a significant supplement of the code.
引文
[1]孙悦,袁晓铭.第11届国际土动力学和地震工程会议及第13届世界地震工程会议砂土液化研究综述[J].世界地震工程,2006,22(1):15-20.
[2]GB 50011—2001建筑物抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]GB 50021—2001岩土工程勘察设计规范[S].北京:中国建筑工业出版社,2001.
[4]Youd T L,Idriss I M.Liquefaction Resistance of Soils:Summary Report from the 1996 NCEER and 1998NCEER/NSF Workshops on Evaluation of Liquefaction Resistance of soils[J].Geotechnical and Geoenvironmental Engineering,2001(4):297-313.
[5]佘跃心,刘汉龙,高玉峰.场地液化势评价概率模型[J].工程勘察,2002(5):4-7.
[6]Samson S C Liao,Whitman R V.Regression Models for Evaluation Liquefaction Probability[J].Journal of Engineering,1988(4):389-411.
[7]Sheng YaoLai,Wen Jongchang.Logistic Regressionmodel for Evaluating Soil Liquefaction Probability Using CPT Data[J].Geotechnical and Geoenvironmental Engineering,2006(5):694-704.
[8]Juang C H,Jiang Tao.Assessing Probability-based Methods for Liquefaction Potential Evaluation[J].Geotechnical and Geoenvironmental Engineering,2002(6):580-589.
[9]Juang C H,Chen C J.CPT Liquefaction Analysis,Part 1:Determination of Limit State Function[J].Geotechnique,2000(5):583-592.
[10]Juang C H,Chen C J.CPT Liquefaction Analysis,Part2:Reliability for Design[J].Geotechnique,2000(5):593-599.
[11]Robertson P K,Wride C E.Evaluating Cyclic Liquefaction Potential Using the Cone Penetration Test[J].Canadian Geotechnical Jourmal,1998,35(3):442-459.
[12]Haldar A,Tang WH.Probabilistic Evaluation of Liquefaction Potential[J].Journal of the Geotechnical Engineering Division,1979,105(GT2):145-163.
[13]高大钊.土力学可靠性原理[M].北京:中国建筑工业出版社,1989.
[14]胡聿贤.地震工程学[M].2版.北京:地震出版社,2006.
[15]崔余江,杨伟毅.地震动参数衰减规律的研究[J].世界地震工程,2002,18(3):116-122.
[16]周锡元,苏金宇,王广军.地震动衰减规律中距离参数的新定义及其在地震危险性分析中的应用[J].地震工程与工程振动,1987(2):57-68.
[17]霍俊荣,胡聿贤.地震动峰值参数衰减规律的研究[J].地震工程与工程振动,1992,12(2):1-11.
[18]Moss R E S,Seed R B.CPT-based Probabilistic and Deterministic Assessment of in Situ Seismic Soil Liquefaction Potential[J].Geotechnical and Geoenvironmental Engineering,2006(8):1032-1051.
[19]Juang C H,Yuan Haiming.Simplified Cone Penetration Test-based Method for Evaluating Liquefaction Resistance of Soils[J].Geotechnical and Geoenvironmental Engineering,2003(1):66-79.
[20]Juang C H,Fang S Y.First Order Reliability Method for Probabilistic Liquefaction Trigging Analysis Using CPT[J].Geotechnical and Geoenvironmental Engineering,2006(5):337-350.
[21]洪楠,侯军.SAS for Windows(V8)统计分析系统教程新编[M].北京:清华大学出版社,北京交通大学出版社,2004.
[22]王济川,郭志刚.LOGISTIC回归模型方法与应用[M].北京:高等教育出版社,2001.
[23]刘恢先.唐山大地震震害(第一分册)[M].北京:地震出版社,1985.
[2]GB 50011—2001建筑物抗震设计规范[S].北京:中国建筑工业出版社,2001.
[3]GB 50021—2001岩土工程勘察设计规范[S].北京:中国建筑工业出版社,2001.
[4]Youd T L,Idriss I M.Liquefaction Resistance of Soils:Summary Report from the 1996 NCEER and 1998NCEER/NSF Workshops on Evaluation of Liquefaction Resistance of soils[J].Geotechnical and Geoenvironmental Engineering,2001(4):297-313.
[5]佘跃心,刘汉龙,高玉峰.场地液化势评价概率模型[J].工程勘察,2002(5):4-7.
[6]Samson S C Liao,Whitman R V.Regression Models for Evaluation Liquefaction Probability[J].Journal of Engineering,1988(4):389-411.
[7]Sheng YaoLai,Wen Jongchang.Logistic Regressionmodel for Evaluating Soil Liquefaction Probability Using CPT Data[J].Geotechnical and Geoenvironmental Engineering,2006(5):694-704.
[8]Juang C H,Jiang Tao.Assessing Probability-based Methods for Liquefaction Potential Evaluation[J].Geotechnical and Geoenvironmental Engineering,2002(6):580-589.
[9]Juang C H,Chen C J.CPT Liquefaction Analysis,Part 1:Determination of Limit State Function[J].Geotechnique,2000(5):583-592.
[10]Juang C H,Chen C J.CPT Liquefaction Analysis,Part2:Reliability for Design[J].Geotechnique,2000(5):593-599.
[11]Robertson P K,Wride C E.Evaluating Cyclic Liquefaction Potential Using the Cone Penetration Test[J].Canadian Geotechnical Jourmal,1998,35(3):442-459.
[12]Haldar A,Tang WH.Probabilistic Evaluation of Liquefaction Potential[J].Journal of the Geotechnical Engineering Division,1979,105(GT2):145-163.
[13]高大钊.土力学可靠性原理[M].北京:中国建筑工业出版社,1989.
[14]胡聿贤.地震工程学[M].2版.北京:地震出版社,2006.
[15]崔余江,杨伟毅.地震动参数衰减规律的研究[J].世界地震工程,2002,18(3):116-122.
[16]周锡元,苏金宇,王广军.地震动衰减规律中距离参数的新定义及其在地震危险性分析中的应用[J].地震工程与工程振动,1987(2):57-68.
[17]霍俊荣,胡聿贤.地震动峰值参数衰减规律的研究[J].地震工程与工程振动,1992,12(2):1-11.
[18]Moss R E S,Seed R B.CPT-based Probabilistic and Deterministic Assessment of in Situ Seismic Soil Liquefaction Potential[J].Geotechnical and Geoenvironmental Engineering,2006(8):1032-1051.
[19]Juang C H,Yuan Haiming.Simplified Cone Penetration Test-based Method for Evaluating Liquefaction Resistance of Soils[J].Geotechnical and Geoenvironmental Engineering,2003(1):66-79.
[20]Juang C H,Fang S Y.First Order Reliability Method for Probabilistic Liquefaction Trigging Analysis Using CPT[J].Geotechnical and Geoenvironmental Engineering,2006(5):337-350.
[21]洪楠,侯军.SAS for Windows(V8)统计分析系统教程新编[M].北京:清华大学出版社,北京交通大学出版社,2004.
[22]王济川,郭志刚.LOGISTIC回归模型方法与应用[M].北京:高等教育出版社,2001.
[23]刘恢先.唐山大地震震害(第一分册)[M].北京:地震出版社,1985.
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