基于离散单元法的混凝土细观力学模型研究进展
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摘要
介绍了离散单元法用于混凝土细观结构数值模拟的优越性及其基本原理;总结了目前基于离散单元法的刚体-弹簧元模型、扩展的离散单元法、颗粒-界面元模型、梁-颗粒模型等常用模型的原理、研究现状、成果,以及各自的优缺点;对数值模型建立中应考虑的关键问题,如破坏准则、本构关系以及材料参数的确定方法等作了归纳分析。指出目前离散单元法用于混凝土数值模拟的研究主要以二维模型、简单受力状态、定性分析为主,而在复杂受力状态、定量分析、随机性分析以及相应实用软件的开发等方面仍有待进一步研究。
The advantages and principles of meso-mechanical models of concrete based on the discrete element method are introduced.Various models widely used at present,such as Rigid Body-Spring Model,Extended Distinct Element Method,Particle-Interface Element Model,and Beam-Particle Model,are analyzed.The study state,as well as advantages and disadvantages of each method,are summarized.Some problems needed to be noted when the model is built,such as failure criteria,constitutive relationship,and material parameters,are also analyzed.Finally,it is figured out that current studies on numerical simulation of concrete based on the discrete element method mainly focus on planar model,simple load state,and qualitative analysis,more efforts on complex load state,quantitative analysis,stochastic analysis and development of corresponding software are needed in the future.
The advantages and principles of meso-mechanical models of concrete based on the discrete element method are introduced.Various models widely used at present,such as Rigid Body-Spring Model,Extended Distinct Element Method,Particle-Interface Element Model,and Beam-Particle Model,are analyzed.The study state,as well as advantages and disadvantages of each method,are summarized.Some problems needed to be noted when the model is built,such as failure criteria,constitutive relationship,and material parameters,are also analyzed.Finally,it is figured out that current studies on numerical simulation of concrete based on the discrete element method mainly focus on planar model,simple load state,and qualitative analysis,more efforts on complex load state,quantitative analysis,stochastic analysis and development of corresponding software are needed in the future.
引文
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[14]森川博司,泽本佳和,小鹿纪英.個别要素法を用いにコソクリ?トの破壊解析[J].日本建筑学会构造系论文集(Journal of Structural ConstructionEngineering,AIJ),1995,473:127-135.
[15]Liu Kaixin,Gao Lingtian.The application of discreteelement method in solving three-dimensional impactdynamics problems[J].ACTA MECHANICA SOLI-DA SINICA,2003,16(3):256-261.
[16]邢纪波.梁-颗粒模型导论[M].北京:地震工程出版社,1999.
[17]Tang Z P,Horie Y,Psakhie S G.Discrete meso-element modeling of shock processes in powders//Davison L et al.High-pressure Shock Compressionof SolidsⅣ[C].New York:Springer,1997:143-176.
[18]杨顺存,邢纪波,郑磊.混凝土类脆性无序介质破坏过程的动态模拟研究[J].建筑技术开发,2003,30(2):38-40.
[19]Meguro K,Hakuno M.Application of the extendeddistinct element method for collapse simulation of adouble-deck bridge[J].Structural Engineering/Earthquake Engineering,1994,10(4):175-185.
[2]Culldall P A.A computer model for simulating pro-gressive large scale movements in blocky system.In:Muller Led,ed.Proceeding of Symposium of Interna-tional Society of Rock Mechanics[C].Rotterdam:Balkama A A,1971(1):8-12.
[3]刘凯欣,高凌天.离散元法研究的评述[J].力学进展,2003,33(4):483-490.
[4]川井忠彦,都井裕.平面歪问题の离散化解析に对すゐ新しぃ要素[J].生产研究,1977,29(4):204-207.
[5]Bolander J E,Saito S.Fracture analysis using springnetworks with random geometry[J].EngineeringFracture Mechanics,1998,61(5-6):569-591.
[6]Kohei Nagai,Yasuhiko Sato,Tamon Ueda.Meso-scopic simulation of failure of mortar and concrete by2D RBSM[J].Journal of Advanced Concrete Tech-nology,2004,2(3):359-374.
[7]Tamon Ueda.Prediction of structural performanceduring service life from microstructure//WorkshopProceedings-Microstructure and Durability to PredictService Life of Concrete Structures[C].Sapporo:Hokkaido University,2004:39-48.
[8]王宝庭,宋玉普,张燕坤.基于刚体-弹簧模型的混凝土微裂纹行为模拟[J].工程力学,1999,16(2):140-144.
[9]刘玉擎.模拟水泥基复合材料细观断裂过程的随机弹簧元[J].复合材料学报,2003,20(2):106-111.
[10]Kikuchi A,Kawai T,Suzuki N.The rigid bodies-spring models and their applications to three dimen-sional crack problems[J].Computers and Struc-tures,1992,44(1/2):469-480.
[11]Zubelewicz A,Baant Z P.Interface element modelingof fracture in aggregate composites[J].Journal ofEngineering Mechanics,1987,113(11):1619-1630.
[12]Donz啨F V,Magnier S A,Daudeville L,et al.Nu-merical study of compressive behavior of concrete athigh strain rates[J].Journal of Engineering Mechan-ics,1999,125(10):1154-1163.
[13]Hakuno M,Meguro K.Simulation of concrete-frame collapse due to dynamic loading[J].Journal ofEngineering Mechanics,1993,119(9):1709-1722.
[14]森川博司,泽本佳和,小鹿纪英.個别要素法を用いにコソクリ?トの破壊解析[J].日本建筑学会构造系论文集(Journal of Structural ConstructionEngineering,AIJ),1995,473:127-135.
[15]Liu Kaixin,Gao Lingtian.The application of discreteelement method in solving three-dimensional impactdynamics problems[J].ACTA MECHANICA SOLI-DA SINICA,2003,16(3):256-261.
[16]邢纪波.梁-颗粒模型导论[M].北京:地震工程出版社,1999.
[17]Tang Z P,Horie Y,Psakhie S G.Discrete meso-element modeling of shock processes in powders//Davison L et al.High-pressure Shock Compressionof SolidsⅣ[C].New York:Springer,1997:143-176.
[18]杨顺存,邢纪波,郑磊.混凝土类脆性无序介质破坏过程的动态模拟研究[J].建筑技术开发,2003,30(2):38-40.
[19]Meguro K,Hakuno M.Application of the extendeddistinct element method for collapse simulation of adouble-deck bridge[J].Structural Engineering/Earthquake Engineering,1994,10(4):175-185.
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