全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于离散元方法的沥青混凝土断裂机理分析

Keywords: 沥青混凝土,断裂机理,离散元,沥青膜,抗拉强度,黏结强度

Full-Text   Cite this paper   Add to My Lib

Abstract:

为了从细观角度深入分析沥青混凝土的断裂机理,根据概率理论,建立了集料质量级配与二维数量级配的关系,并通过计算机随机投放技术生成了具有2种不同沥青膜厚度的沥青混合料二维数字试件;利用离散元方法,模拟了沥青混合料小梁试件的断裂过程,分析了沥青砂浆抗拉强度、砂浆与集料黏结强度和沥青膜厚度对沥青混合料断裂过程的影响.结果表明:对于沥青膜较厚的沥青混合料而言,起裂阶段和扩展阶段的裂纹主要出现在沥青砂浆中,沥青砂浆的抗拉强度是影响混合料断裂的主要因素;当沥青膜较薄时,起裂和扩展阶段的裂纹在沥青砂浆内部和砂浆与集料界面中都有发现,砂浆抗拉强度决定着混合料的破坏应力和应变,砂浆与集料的黏结强度决定着混合料裂纹扩展的速率.

References

[1]  武建民,李晓军.沥青混合料小梁疲劳试验的有限元模拟[J].长安大学学报:自然科学版,2004,24(1):5-8.WU Jian-min,LI Xiao-jun.Simulation of asphalt mixtures beam test with finite-element method[J].Journal of Chang'anUniversity:Natural Science Edition,2004,24(1):5-8.(in Chinese)
[2]  YOU Z P.Development of a micromechanical modeling approach to predict asphalt mixture stiffness using the discrete elementmethod[D].Illinois:University of Illinois at Urbana-Champaign,2003.
[3]  陆秀峰,刘西拉,覃维祖.从混凝土二维截面推测骨料粒径分布[J].岩石力学与工程学报,2005,24(17):3107-3111.LU Xiu-feng,LIU Xi-la,QIN Wei-zu.Estimation of coarse aggregate size distribution from two-dimensional section[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(17):3107-3112.(in Chinese)
[4]  黄碧霞.体视学与图像分析技术在沥青混合料级配分析中的应用[D].成都:西南交通大学土木工程学院,2007:58-66.HUANG Bi-xia.Gradation analysis of asphalt mixture based on digital image analysis and stereology[D].Chengdu:School ofCivil Engineering Southwest Jiaotong University,2007:58-66.(in Chinese)
[5]  方韬,龚顺风,金伟良.混凝土结构破坏过程的离散单元法模拟[J].浙江大学学报:工学版,2004,38(7):921-925.FANG Tao,GONG Shun-feng,JIN Wei-liang.Failure process simulation of concrete structures by discrete element method[J].Journal of Zhejiang University:Engineering Science,2004,38(7):921-925.(in Chinese)
[6]  胡霞光.沥青混合料微观力学分析综述[J].长安大学学报:自然科学版,2005,25(2):6-9.HU Xia-guang.Review on asphalt mixture micromechanics analysis[J].Journal of Chang'an University:Natural ScienceEdition,2005,25(2):6-9.(in Chinese)
[7]  YOU Z P,BUTTLAR W G.Discrete element modeling to predict the modulus of asphalt concrete mixtures[J].Journal ofMaterials in Civil Engineering,2004,16(2):140-144.
[8]  BUTTLAR W G,YOU Z P.Discrete-element modeling of asphalt concrete:a micro-fabric approach[C]∥TransportationResearch Record:Journal of the Transportation Research Board,No 1757,TRB,National Research Council,Washington DC,2001:111-118.
[9]  ABBAS R A.Simulation of the micromechanical behavior of asphalt mixtures using the discrete element method[D].Washington:Washington State University,2004.
[10]  LIU Yu,FENG Shi-rong,HU Xia-guang.Discrete element simulation of asphalt mastics based on burgers model[J].Journalof Southwest Jiaotong University:English Edition,2007,15(1):20-25.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133