汶川地震诱发滑坡的地震动加速度评判标准
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摘要
通过对汶川MS8.0地震强震记录资料的计算分析,给出一个与地震诱发滑坡关系比较密切的地震动加速度参数最大临界加速度.分析表明,最大临界加速度与地震滑坡的相关性高于峰值加速度,而且可以消除峰值加速度作为判据使用时存在的问题.利用汶川地震强震资料建立了该参数在震区的衰减关系,由衰减关系得到的地震滑坡影响区域与汶川地震滑坡实际分布情况非常接近,表明该参数具有很好的实用价值.利用最大临界加速度直接与斜坡的临界加速度比较,可以给出斜坡是否发生破坏变形的最终结果,简化地震滑坡判别过程.因此认为可将该参数作为地震影响因素引入到地震滑坡灾害判别工作中.
By analyzing strong ground motion records obtained from the 2008 Wenchuan MS8.0 earthquake,a ground motion acceleration parameter,named Maximum Critical Acceleration(MCA),is given in this paper.Analyzed result shows that the parameter MCA is more relevant to earthquake-induced landslide than PGA,and by using it we may solve the problems encountered in using PGA criterion to judge whether landslide can be triggered during earthquake.The MCA attenuation relation is built based on the data from the Wenchuan earthquake in Longmenshan mountain area.The appraised landslide area following the attenuation relation well fits the actual landslide distribution in the Wenchuan earthquake-hit area,indicating that this parameter is suitable for evaluating earthquake-induced landslide.Comparing MCA directly with slope critical acceleration may determine whether landslides can be triggered or not,simplifying the judging process of earthquake-induced landslide.The conclusion is that this parameter can be applied to the earthquake-induced landslides evaluation as an earthquake triggering factor.
By analyzing strong ground motion records obtained from the 2008 Wenchuan MS8.0 earthquake,a ground motion acceleration parameter,named Maximum Critical Acceleration(MCA),is given in this paper.Analyzed result shows that the parameter MCA is more relevant to earthquake-induced landslide than PGA,and by using it we may solve the problems encountered in using PGA criterion to judge whether landslide can be triggered during earthquake.The MCA attenuation relation is built based on the data from the Wenchuan earthquake in Longmenshan mountain area.The appraised landslide area following the attenuation relation well fits the actual landslide distribution in the Wenchuan earthquake-hit area,indicating that this parameter is suitable for evaluating earthquake-induced landslide.Comparing MCA directly with slope critical acceleration may determine whether landslides can be triggered or not,simplifying the judging process of earthquake-induced landslide.The conclusion is that this parameter can be applied to the earthquake-induced landslides evaluation as an earthquake triggering factor.
引文
丁彦慧,王余庆,孙进忠.1999.地震崩滑与地震参数的关系及其在边坡震害预测中的应用[J].地球物理学报,42(增刊):101--107.
胡聿贤.2006.地震工程学[M].北京:地震出版社:104--109.
黄润秋,李为乐.2008.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,27(12):2585--2592.
李忠生.2003.国内外地震滑坡灾害研究综述[J].灾害学,18(4):64--70.
廖轩吾.2000.集集地震诱发之山崩[D].台湾台北:国立中央大学地球物理研究所:42--48.
刘传正.2008.四川汶川地震灾害与地质环境安全[J].地质通报,27(11):1907--1912.
乔建平,赵宇.2001.滑坡危险度区划研究评述[J].山地学报,19(2):157--160.
王秀英,聂高众.2009.汶川MS8.0级地震诱发崩滑特点及其与地震动参数对应关系初析[J].岩土工程学报,31(9):1378--1383.
王秀英,聂高众,王登伟.2009.利用强震记录研究汶川地震诱发滑坡[J].岩石力学与工程学报,28(11):2369--2376.
王秀英.2009.地震滑坡灾害快速评估技术及对应急影响研究[D].北京:中国地震局地质研究所:55--64.
王秀英,聂高众,王登伟.2010.汶川地震诱发滑坡与地震动峰值加速度对应关系研究[J].岩石力学与工程学报,29(1):82--89.
谢毓寿.1957.新的中国地震烈度表[J].地球物理学报,6(1):35--47.
辛鸿博,王余庆.1999.岩土边坡地震崩滑及其初判准[J].岩土工程学报,21(5):591--594.
殷跃平.2008.汶川八级地震地质灾害研究[J].工程地质学报,16(4):433--444
于海英,王栋,杨永强,卢大伟,解全才,张明宇,周宝峰,江纹乡,程翔,杨剑.2008.汶川8.0级地震强震动特征初步分析[J].震灾防御技术,3(4):321--336.
周朝晖.2008.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,(4):25--29.
Arias A.1970.A measure of earthquake intensity[G]∥Hansen R J ed.Seismic Design for Nuclear Power Plants.Cambridge,Massachusetts:MIT Press:438--483.
Harp E L,Wilson R C.1995.Shakingintensity thresholds for rock falls and slides:Evidence from1987Whittier Nar-rows and superstition hills earthquake strong-motion records[J].Bull Seism Soc Amer,85(6):1739--1757.
Jibson R W,Harp E L,Michael J A.2000.A methodfor producing digital probabilistic seismic landslide hazard maps[J].Engng Geol,58(3--4):271--289.
Li X,Zhou Z,Yu H,Wen R,Lu D,Huang M,Zhou Y,Cu J.2008.Strong motion observations and recordings fromthe great Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,7(3):235--246.
Newmark N M.1965.Effects of earthquake on dams and embankments[J].Geotechnique,15(2):139--160.
Pradel D,Smith P M,Stewart J P,Raad G.2005.Case history of landslide movement duringthe northridge earthquake[J]Journal of Geotechnical and Geoenvironmental Engineering,131(11):1360--1369.
WilsonR C,Keefer D K.1983.Dynamic analysis of a slope failure fromthe1979Coyote Lake,California,earthquake[J].Bull Seism Soc Amer,73(3):863--877.
Wilson R C,Keefer D K.1985.Predicting areal limits of earthquake-induced landsliding[G]∥Ziony J I ed.EvaluatingEarthquake Hazards in the Los Angeles Region an Earth-Science Perspective,US Geological Survey Profes-sional Paper,1360.Washington,United States:USGPO:317--345.
Zhou B,Zhang Y.1994.Some characteristics of earthquake-induced landslide in Southwestern China[J].NorthwesternSeismological Journal,16(1):95--103.
胡聿贤.2006.地震工程学[M].北京:地震出版社:104--109.
黄润秋,李为乐.2008.“5.12”汶川大地震触发地质灾害的发育分布规律研究[J].岩石力学与工程学报,27(12):2585--2592.
李忠生.2003.国内外地震滑坡灾害研究综述[J].灾害学,18(4):64--70.
廖轩吾.2000.集集地震诱发之山崩[D].台湾台北:国立中央大学地球物理研究所:42--48.
刘传正.2008.四川汶川地震灾害与地质环境安全[J].地质通报,27(11):1907--1912.
乔建平,赵宇.2001.滑坡危险度区划研究评述[J].山地学报,19(2):157--160.
王秀英,聂高众.2009.汶川MS8.0级地震诱发崩滑特点及其与地震动参数对应关系初析[J].岩土工程学报,31(9):1378--1383.
王秀英,聂高众,王登伟.2009.利用强震记录研究汶川地震诱发滑坡[J].岩石力学与工程学报,28(11):2369--2376.
王秀英.2009.地震滑坡灾害快速评估技术及对应急影响研究[D].北京:中国地震局地质研究所:55--64.
王秀英,聂高众,王登伟.2010.汶川地震诱发滑坡与地震动峰值加速度对应关系研究[J].岩石力学与工程学报,29(1):82--89.
谢毓寿.1957.新的中国地震烈度表[J].地球物理学报,6(1):35--47.
辛鸿博,王余庆.1999.岩土边坡地震崩滑及其初判准[J].岩土工程学报,21(5):591--594.
殷跃平.2008.汶川八级地震地质灾害研究[J].工程地质学报,16(4):433--444
于海英,王栋,杨永强,卢大伟,解全才,张明宇,周宝峰,江纹乡,程翔,杨剑.2008.汶川8.0级地震强震动特征初步分析[J].震灾防御技术,3(4):321--336.
周朝晖.2008.2008年四川汶川8.0级地震强震动台网观测记录[J].四川地震,(4):25--29.
Arias A.1970.A measure of earthquake intensity[G]∥Hansen R J ed.Seismic Design for Nuclear Power Plants.Cambridge,Massachusetts:MIT Press:438--483.
Harp E L,Wilson R C.1995.Shakingintensity thresholds for rock falls and slides:Evidence from1987Whittier Nar-rows and superstition hills earthquake strong-motion records[J].Bull Seism Soc Amer,85(6):1739--1757.
Jibson R W,Harp E L,Michael J A.2000.A methodfor producing digital probabilistic seismic landslide hazard maps[J].Engng Geol,58(3--4):271--289.
Li X,Zhou Z,Yu H,Wen R,Lu D,Huang M,Zhou Y,Cu J.2008.Strong motion observations and recordings fromthe great Wenchuan earthquake[J].Earthquake Engineering and Engineering Vibration,7(3):235--246.
Newmark N M.1965.Effects of earthquake on dams and embankments[J].Geotechnique,15(2):139--160.
Pradel D,Smith P M,Stewart J P,Raad G.2005.Case history of landslide movement duringthe northridge earthquake[J]Journal of Geotechnical and Geoenvironmental Engineering,131(11):1360--1369.
WilsonR C,Keefer D K.1983.Dynamic analysis of a slope failure fromthe1979Coyote Lake,California,earthquake[J].Bull Seism Soc Amer,73(3):863--877.
Wilson R C,Keefer D K.1985.Predicting areal limits of earthquake-induced landsliding[G]∥Ziony J I ed.EvaluatingEarthquake Hazards in the Los Angeles Region an Earth-Science Perspective,US Geological Survey Profes-sional Paper,1360.Washington,United States:USGPO:317--345.
Zhou B,Zhang Y.1994.Some characteristics of earthquake-induced landslide in Southwestern China[J].NorthwesternSeismological Journal,16(1):95--103.
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