基于ABAQUS的高混凝土面板堆石坝地震反应三维非线性分析
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摘要
ABAQUS软件是目前国际上功能最强大的非线性有限元软件之一。该软件包括了众多材料本构模型,但尚缺少国内外土石坝动力分析中广泛采用的等效线性化本构模型。本文在ABAQUS软件上实现了土的动力等效线性化模型和土石坝地震永久变形计算,并通过一个典型算例进行了验证;在此基础上,对一座拟建中的高混凝土面板堆石坝进行了地震响应分析,重点分析大坝的绝对加速度、动位移和残余变形等动力反应情况。结果表明,坝体在地震作用下的响应不强烈,但坝顶出现明显的鞭稍效应,需采取相应的抗震工程措施。
ABAQUS that integrates various material models is a powerful code of nonlinear finite element analysis.The current release of this code,however,has no equivalent linear model that is widely used in geotechnical engineering for deformation simulation.This paper presents a technique of adopting such a model in the frame of ABAQUS.A 3D nonlinear FEM method was used to analyze dynamic responses of a high concrete-faced rockfill dam(CFRD),focusing on distributions of absolute acceleration,dynamic displacement,dynamic stress,permanent deformation.Results show that under the design earthquake conditions,the overall response is weak,while the response at the dam top is strong.Thus certain measures should be taken to ensure stability of the dam.
ABAQUS that integrates various material models is a powerful code of nonlinear finite element analysis.The current release of this code,however,has no equivalent linear model that is widely used in geotechnical engineering for deformation simulation.This paper presents a technique of adopting such a model in the frame of ABAQUS.A 3D nonlinear FEM method was used to analyze dynamic responses of a high concrete-faced rockfill dam(CFRD),focusing on distributions of absolute acceleration,dynamic displacement,dynamic stress,permanent deformation.Results show that under the design earthquake conditions,the overall response is weak,while the response at the dam top is strong.Thus certain measures should be taken to ensure stability of the dam.
引文
[1]中华人民共和国水利部.SL274-200碾压式土石坝设计规范[S].北京:中国水利水电出版社,2002.The Ministry of Water Resources of the Peoples Republic of China.Design specification for rolled earth-rock fill dams[S].Beijing:China WaterPower Press,2002.(in Chinese)
[2]费康,刘汉龙.ABAQUS的二次开发及在土石坝静、动力分析中的应用[J].岩土力学,2010,31(3):881～890.FEI Kang,LIU Han-long.Secondary development of ABAQUS and its application to static and dynamic analyses of earth-rockfill dam[J].Rock and Soil Mechanics,2010,31(3):881～890.(in Chinese)
[3]Hibbitt,Karlsson&Sorensen,Inc.ABAQUS user’s manuals version6.3[M].Rhode Island:Hibbitt,Karlsson&Sorensen,Inc.,2002.
[4]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989.GU Gancheng.Earthquake engineering for earth-rock fill dams[M].Nanjing:Hohai University Press,1989.(in Chinese).
[5]赵剑明,常亚屏,陈宁.高心墙堆石坝地震变形与稳定分析[J].岩土力学,2004,25(s2):423～428.ZHAO Jiaoming,CHANG Yaping,CHEN Ning.Study on earthquake-induced permanent deformation and dynamic stability of highcore rockfill dam[J].Rock and Soil Mechanics,2004,25(S2):423～428.(in Chinese)
[6]孔宪京,邹德高,邓学晶.高土石坝综合抗震措施及其效果的验算[J].水利学报,2006,37(12):1489～1495.KONG Xining,ZOU Degao,DENG Xuejing.Comprehensive earthquake resistant measure of high earth-rockfill dams andeffectiveness verification[J].Journal of Hydraulic Engineering,2006,37(12):1489～1495.(in Chinese).
[7]刘小生,王钟宁,赵剑明.面板堆石坝振动模型试验及动力分析研究[J].水利学报,2002,33(2):29～36.LIU Xiaosheng,WANG Zhongning,ZHAO Jianming.Advancement of technology on shaking table model test and dynamic analysisof CFRD[J].Journal of Hydraulic Engineering,2002,32(2):29～36.(in Chinese).
[8]潘家军,饶锡保,张计.超宽河谷上面板堆石坝地震响应特性分析[J].世界地震工程,2010,26(S1):301～304.PAN Jiajun,RAO Xibao,ZHANG Ji.Seismic response analysis of a concrete faced rockfill dam on super wide valley[J].WordEarthquake Engineering[J].2010,26(S1):301～304.(in Chinese).
[2]费康,刘汉龙.ABAQUS的二次开发及在土石坝静、动力分析中的应用[J].岩土力学,2010,31(3):881～890.FEI Kang,LIU Han-long.Secondary development of ABAQUS and its application to static and dynamic analyses of earth-rockfill dam[J].Rock and Soil Mechanics,2010,31(3):881～890.(in Chinese)
[3]Hibbitt,Karlsson&Sorensen,Inc.ABAQUS user’s manuals version6.3[M].Rhode Island:Hibbitt,Karlsson&Sorensen,Inc.,2002.
[4]顾淦臣.土石坝地震工程[M].南京:河海大学出版社,1989.GU Gancheng.Earthquake engineering for earth-rock fill dams[M].Nanjing:Hohai University Press,1989.(in Chinese).
[5]赵剑明,常亚屏,陈宁.高心墙堆石坝地震变形与稳定分析[J].岩土力学,2004,25(s2):423～428.ZHAO Jiaoming,CHANG Yaping,CHEN Ning.Study on earthquake-induced permanent deformation and dynamic stability of highcore rockfill dam[J].Rock and Soil Mechanics,2004,25(S2):423～428.(in Chinese)
[6]孔宪京,邹德高,邓学晶.高土石坝综合抗震措施及其效果的验算[J].水利学报,2006,37(12):1489～1495.KONG Xining,ZOU Degao,DENG Xuejing.Comprehensive earthquake resistant measure of high earth-rockfill dams andeffectiveness verification[J].Journal of Hydraulic Engineering,2006,37(12):1489～1495.(in Chinese).
[7]刘小生,王钟宁,赵剑明.面板堆石坝振动模型试验及动力分析研究[J].水利学报,2002,33(2):29～36.LIU Xiaosheng,WANG Zhongning,ZHAO Jianming.Advancement of technology on shaking table model test and dynamic analysisof CFRD[J].Journal of Hydraulic Engineering,2002,32(2):29～36.(in Chinese).
[8]潘家军,饶锡保,张计.超宽河谷上面板堆石坝地震响应特性分析[J].世界地震工程,2010,26(S1):301～304.PAN Jiajun,RAO Xibao,ZHANG Ji.Seismic response analysis of a concrete faced rockfill dam on super wide valley[J].WordEarthquake Engineering[J].2010,26(S1):301～304.(in Chinese).
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