堆石料动力特性参数对面板堆石坝三维非线性地震响应的影响
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摘要
本文通过变化堆石料微小应变下的剪切模量以及剪切模量衰减曲线和阻尼比递增曲线的取值范围 ,利用三维等价线性有限元动力分析方法研究了材料动力特性对于高混凝土面板堆石坝的地震反应的影响。多种方案的计算结果对比分析表明 ,坝料的动力特性对于面板堆石坝等效线性振动体系自振特性、堆石体地震响应与面板动应力等具有显著的影响。
In this paper, the equivalent linearization approach together with three dimensional finite element method is used in dynamic nonlinear analysis of seismic response of Hongjiadu concrete faced rockfill dam (CFRD). Based on a number of numerical computations, the effects of the variations of dynamic parameters of rockfill materials on seismic response behavior of CFRD are studied. The initial shear modulus at small strain, the nonlinear variations of shear modulus, and damping ratio with shear strain are taken into account. Besides, the dependence of the variation curves of shear modulus with shear strain on confining pressure is considered. The general characteristics of seismic response of CFRD, including the distribution of peak accelerations of rock fills and dynamic stresses of concrete slab, under different combinations of the related factors, are discussed. Some findings and conclusions, which are helpful to understand the earthquake resistant behavior of CFRD, are drawn through comparative studies.
In this paper, the equivalent linearization approach together with three dimensional finite element method is used in dynamic nonlinear analysis of seismic response of Hongjiadu concrete faced rockfill dam (CFRD). Based on a number of numerical computations, the effects of the variations of dynamic parameters of rockfill materials on seismic response behavior of CFRD are studied. The initial shear modulus at small strain, the nonlinear variations of shear modulus, and damping ratio with shear strain are taken into account. Besides, the dependence of the variation curves of shear modulus with shear strain on confining pressure is considered. The general characteristics of seismic response of CFRD, including the distribution of peak accelerations of rock fills and dynamic stresses of concrete slab, under different combinations of the related factors, are discussed. Some findings and conclusions, which are helpful to understand the earthquake resistant behavior of CFRD, are drawn through comparative studies.
引文
[ 1 ] Uddin Nasim,A Dynamic Analysis Procedure for Concrete Face Rock-fill DamsSubjected to Strong Seismic Excitation,Computers and Structures,1 999,72 :4 0 9～ 4 2 1 .
[2 ] 韩国城、栾茂田、刘文延、肖白云、汪荣大 ,瀑布沟心墙堆石坝地震反应三维非线性分析 ,大连理工大学学报 ,2 0 0 0 ,4 0 ( 2 ) :2 1 8～ 2 2 3。
[3 ] 大连理工大学土木工程系 ,面板堆石坝静 -动耦合分析及抗震结构形式与工程措施研究 ,“九五”国家重点科技攻关项目 (子子题编号 :96-2 2 1 -0 2 -0 3 -0 3 -0 2 )研究报告 ,2 0 0 0。
[4 ] 吴军帅、姜朴 ,土与混凝土接触面的动力剪切特性 ,岩土工程学报 ,1 992 ,1 4( 2 ) :61～ 66。
[5] 徐汉忠、吴旭光、马贞信 ,计算动水压力附加质量的韦氏公式的扩充 ,河海大学学报 ,1 997,2 5( 5) :1 2 0～ 1 2 3。
[6] Hardin,B.O.and V.P.Drnevich,Shear Modulus and Damping in Soils:De-sign Equations and Curves,Journal of the Soil Mechanics and Foundations Divi-sion,ASCE,1 972 ,98( SM7) :667～ 692。
[7] 吴兴征、栾茂田、阴吉英 ,面板堆石坝应力与变形的弹塑性有限元计算与分析 ,大连理工大学学报 ,2 0 0 0 ,4 0 ( 5) :60 2～ 60 8。
[8] 陈映坚、顾淦臣 ,钢筋混凝土面板堆石坝动力反应计算 ,岩土工程学报 ,1 987,9( 1 ) :1 2～ 2 2。
[9 ] 迟世春、林皋 ,不同高度面板堆石坝幅频反应的比较研究 ,土动力学理论与实践 (第五届全国土动力学学术会议论文集 )栾茂田主编 ,大连 :大连理工大学出版社 ,1998 ,1 55～ 1 60。
[1 0 ] 韩国城、孔宪京、李俊杰 ,面板堆石坝动力破坏性态及抗震措施试验研究 ,水利学报 ,1 990 ,5:61～ 67。
[1 1 ] Kokusho,T.,Cyclic Triaxial Test of Dynamic Soil Properties for Wide StrainRange,Soils and Foundations,Japanese Society of Soil Mechanics and Founda-tion Engineering,1 980 ,2 0 ( 2 ) :4 5～ 60 .
[1 2 ] Seed,H.B.,R.T.Wong,I.M.Idriss,and K.Tokimatsu,Moduli and Damp-ing Factors for Dynamic Analyses of Cohesionless Soils,Journal of GeotechnicalEngineering,ASCE,1 986,1 1 2 ( 1 1 ) :1 0 1 6～ 1 0 3 2 .
[1 3 ] Rollins,K. M.,M. D. Evans,N. B. Diehl,and W. D. Daily,Shear Modulusand Damping Relationships for Gravels,Journal of Geotechnical and Geoenviron-mental Enginneering,ASCE,1 998,1 2 4 ( 5) :3 96～ 4 0 5
[2 ] 韩国城、栾茂田、刘文延、肖白云、汪荣大 ,瀑布沟心墙堆石坝地震反应三维非线性分析 ,大连理工大学学报 ,2 0 0 0 ,4 0 ( 2 ) :2 1 8～ 2 2 3。
[3 ] 大连理工大学土木工程系 ,面板堆石坝静 -动耦合分析及抗震结构形式与工程措施研究 ,“九五”国家重点科技攻关项目 (子子题编号 :96-2 2 1 -0 2 -0 3 -0 3 -0 2 )研究报告 ,2 0 0 0。
[4 ] 吴军帅、姜朴 ,土与混凝土接触面的动力剪切特性 ,岩土工程学报 ,1 992 ,1 4( 2 ) :61～ 66。
[5] 徐汉忠、吴旭光、马贞信 ,计算动水压力附加质量的韦氏公式的扩充 ,河海大学学报 ,1 997,2 5( 5) :1 2 0～ 1 2 3。
[6] Hardin,B.O.and V.P.Drnevich,Shear Modulus and Damping in Soils:De-sign Equations and Curves,Journal of the Soil Mechanics and Foundations Divi-sion,ASCE,1 972 ,98( SM7) :667～ 692。
[7] 吴兴征、栾茂田、阴吉英 ,面板堆石坝应力与变形的弹塑性有限元计算与分析 ,大连理工大学学报 ,2 0 0 0 ,4 0 ( 5) :60 2～ 60 8。
[8] 陈映坚、顾淦臣 ,钢筋混凝土面板堆石坝动力反应计算 ,岩土工程学报 ,1 987,9( 1 ) :1 2～ 2 2。
[9 ] 迟世春、林皋 ,不同高度面板堆石坝幅频反应的比较研究 ,土动力学理论与实践 (第五届全国土动力学学术会议论文集 )栾茂田主编 ,大连 :大连理工大学出版社 ,1998 ,1 55～ 1 60。
[1 0 ] 韩国城、孔宪京、李俊杰 ,面板堆石坝动力破坏性态及抗震措施试验研究 ,水利学报 ,1 990 ,5:61～ 67。
[1 1 ] Kokusho,T.,Cyclic Triaxial Test of Dynamic Soil Properties for Wide StrainRange,Soils and Foundations,Japanese Society of Soil Mechanics and Founda-tion Engineering,1 980 ,2 0 ( 2 ) :4 5～ 60 .
[1 2 ] Seed,H.B.,R.T.Wong,I.M.Idriss,and K.Tokimatsu,Moduli and Damp-ing Factors for Dynamic Analyses of Cohesionless Soils,Journal of GeotechnicalEngineering,ASCE,1 986,1 1 2 ( 1 1 ) :1 0 1 6～ 1 0 3 2 .
[1 3 ] Rollins,K. M.,M. D. Evans,N. B. Diehl,and W. D. Daily,Shear Modulusand Damping Relationships for Gravels,Journal of Geotechnical and Geoenviron-mental Enginneering,ASCE,1 998,1 2 4 ( 5) :3 96～ 4 0 5
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