

浏览全部资源
扫码关注微信
南京工业大学交通运输工程学院,江苏,南京,210009
Published:2020
移动端阅览
李存柱,盛俭,周正华,杨泽.粗粒料颗粒形状对材料宏观力学性能的影响∗[J].防灾减灾工程学报,2020,(2):222-228
LI Cunzhu. Influence of Particle Shape on the Macroscopic Mechanical Properties of Coarse Aggregate[J]. 2020, (2): 222-228.
粗粒料的颗粒形状是影响材料宏观力学性能的重要因素,大型三轴试验的局限性限制了粗粒料微观结构对力学性能影响的研究。基于二维颗粒流理论,利用PFC2D建立4种不同形状的颗粒簇,进行了双轴实验的颗粒流数值模拟,建立形状与宏观力学性能和变形特征的相互关系。结果表明:颗粒形状系数与材料内摩擦角近似呈线性关系,随着形状系数的增加内摩擦角递减;材料强度峰值和残余强度随着颗粒形状系数的增加而减小;材料初始切线模量随着形状系数的增加而减小;数值模型在加载过程中先出现剪缩效应,后产生剪胀效应,且同一形状颗粒的试样,围压越大,剪胀变形越明显;不同形状颗粒的试样达到最终应变软化状态之前,形状系数越小,剪缩效应越不明显,反之,剪胀效应越明显。
The shape of coarse aggregate is an important impact factor that determines the macroscopic mechanical properties of materials. The limitation of large-scale triaxial tests restricts the study on the influence of microstructure on mechanical properties of the coarse aggregate. Based on two-dimensional particle flow theory
four different shapes of clumps are built by PFC2D
and biaxial tests are simulated. The relationships of macroscopic mechanical properties and deformation behaviour with coarse aggregate shape are established
respectively. The results of particle flow numerical simulation show that the relationship between the particle shape coefficient and the friction angle of material is approximately linear
and the internal friction angle decreases with the increment of shape coefficient. Both the peak strength and the residual strength of coarse aggregate decrease with the increment of particle shape coefficient
and the initial modulus shares the same law. The shear contraction appears firstly in the process of loading
and then the dilatancy effect is observed. For the samples with the same shape of particles
the greater the confining pressure is
the more obvious the shear dilatancy is. Before samples with different shapes reach the final states of strain softening
the smaller the shape coefficient is
the more inconspicuous the shear contraction is. On the contrary
the shear dilatation is more significant.
曲微.基于事故案例分析的铁路行车安全评价[D].大连:大连交通大学,2014. Qu W.Railway traffic safety evaluation based on accident case study[D].Dalian:Dalian Jiaotong University,2014.(in Chinese)
Liu J,Liu F,Kong X,et al.Large-scale shaking table model tests of aseismic measures for concrete faced rock-fill dams[J].Soil Dynamics & Earthquake Engineering,2014,s 61–62(3):152-163.
Yuan L,Liu X,Wang X,et al.Seismic performance of earth-core and concrete-faced rock-fill dams by large-scale shaking table tests[J].Soil Dynamics & Earthquake Engineering,2014,56(1):1-12.
Iai S,Kameoka T.Finite element analysis of earthquake induced damage to anchored sheet pile quay walls[J].Soils & Foundations,2008,33(1):71-91.
Yksel Y,Isik N S,Cevik E.Seismic response of a rubble mound breakwater in Turkey[J].Maritime Engineering,2004,157(4):151-161.
Su H L,Lee S J,Park J G,et al.An experimental study on the characteristics of polyurethane-mixed coarse aggregates by large-scale triaxial test[J].Construction & Building Materials,2017,145:117-125.
刘萌成,高玉峰,刘汉龙,等.粗粒料大三轴试验研究进展[J].岩土力学,2002,23(2):217-221. Liu M Ch,Gao Y F,Liu H L,et al.Development of study a large scale triaxial tset of coarse-grained materials[J].Rock and Soil Mechanics,2002,23(2):217-221.(in Chinese)
张兵,高玉峰,毛金生,等.堆石料强度和变形性质的大型三轴试验及模型对比研究[J].防灾减灾工程学报,2008,28(1):122-126. Zhang B,Gao Y F,Mao J Sh,et al.Comparative research on the strength and deformation characteristics of rockfill materials in large-scale triaxial experiments and models analysis[J].Journal of Disaster Prevention and Mitigation Engineering,2008,28(1):122-126.(in Chinese)
Indraratna B,Wijewardena L S S,Balasubramaniam A S.Large-scale triaxial testing of greywacke rockfill[J].Géotechnique,1993,43(1):37-51.
秦红玉,刘汉龙,高玉峰,等.粗粒料强度和变形的大型三轴试验研究[J].岩土力学,2004,25(10):1 575-1 580. Qin H Y,Liu H L,Gao Y F,et al.Research on strength and deformation behavior of coarse aggregates based on large-scale triaxial tests[J].Rock and Soil Mechanics,2004,25(10):1 575-1 580.(in Chinese)
刘萌成,高玉峰,刘汉龙,等.堆石料变形与强度特性的大型三轴试验研究[J].岩石力学与工程学报,2003,22(7):1 104-1 111. Liu M Ch,Gao Y F,Liu H L,et al.Large-scale triaxial test study on deformation and strength characteristics of rock fill materials[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(7):1 104-1 111.(in Chinese)
蒋应军,李頔,马庆伟,等.级配碎石力学性能影响因素的试验研究[J].交通科学与工程,2010,26(1):6-13. Jiang Y J,Li D,Ma Q W,et al.Experimental research on influencing factors of strength properties for graded broken stone[J].Journal of Transport Science and Engineering,2010,26(1):6-13.(in Chinese)
武利强,朱晟,章晓桦,等.粗粒料试验缩尺效应的分析研究[J].岩土力学,2016,37(8):2 187-2 197. Wu L Q,Zhu Sh,Zhang X H,et al.Analysis of scale effect of coarse-grained materials[J].Rock and Soil Mechanics,2016,37(8):2 187-2 197.(in Chinese)
李翀,何昌荣,王琛,等.粗粒料大型三轴试验的尺寸效应研究[J].岩土力学,2008,29(增1):567-570. Li Ch,He Ch R,Wang Ch,et al.Study of scale effect of large-scale triaxial test of coarse-grained meterials[J].Rock and Soil Mechanics,2008,29(Sup1):567-570.(in Chinese)
李坤蒙,李元辉,徐帅,等.PFC~(2D)数值计算模型微观参数确定方法[J].东北大学学报(自然科学版),2016,37(4):563-567. Li K M,Li Y H,Xu Sh,et al.Method to Determine Microscopic Parameters of PFC2D Numerical Model[J].Journal of Northeastern University(Natural Science),2016,37(4):563-567.(in Chinese)
蒋应军,任皎龙,徐寅善,等.级配碎石力学性能的颗粒流数值模拟方法[J].同济大学学报(自然科学版),2011,39(5):699-704. Jiang Y J,Ren J L,Xu Y Sh,et al.Simulation method of mechanical properties of graded broken stone based on particle flow code[J].Journal of Tongji University(Natural Science),2011,39(5):699-704.(in Chinese)
邵磊,迟世春,贾宇峰.堆石料大三轴试验的细观模拟[J].岩土力学,2009,30(增1):239-243. Shao L,Chi Sh Ch,Jia Y F.Meso-mechanical simulation of a large scale triaxial test of rockfill materials[J].Rock and Soil Mechanics,2009,30(Sup1):239-243.(in Chinese)
杨贵,肖杨,高德清.粗粒料三维颗粒流数值模拟及其破坏准则研究[J].岩土力学,2010,31(增2):402-406. Yang G,Xiao Y,Gao D Q.Study of three-dimensional particle flow numerical simulation and failurecriterion for coarse-grained soils[J].Rock and Soil Mechanics,2010,31(Sup2):402-406.(in Chinese)
周博,汪华斌,赵文锋,等.黏性材料细观与宏观力学参数相关性研究[J].岩土力学,2012,33(10):3 171-3 178. Zhou B,Wang H B,Zhao W F,et al.Analysis of relationship between particle mesoscopic and macroscopic mechanical parameters of cohesive materials[J].Rock and Soil Mechanics,2012,33(10):3 171-3 178.(in Chinese)
杨贵,许建宝,刘昆林.粗粒料颗粒破碎数值模拟研究[J].岩土力学,2015,36(11):3 301-3 306. Yang G,Xu J B,Liu K L.Numerical simulation of particle breakage of coarse aggregates[J].Rock and Soil Mechanics,2015,36(11):3 301-3 306.(in Chinese)
马刚,周伟,常晓林,等.堆石料缩尺效应的细观机制研究[J].岩石力学与工程学报,2012,31(12):2 473-2 482. Ma G,Zhou W,Chang X L,et al.Mesoscopic mechanism study of scale effects[J].Chinese Journal of Rock Mechanics and Engineering,2012,31(12):2 473-2 482.(in Chinese)
童朝霞,周敏,张连卫,等.各向异性颗粒材料双轴压缩试验的离散元数值模拟[J].岩石力学与工程学报,2014,33(增2):4 227-4 232. Tong Zh X,Zhou M,Zhang L W,et al.Numerical modelling of biaxial compression tests for granular materials with inherent anisotropy using DEM[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(Sup2):4 227-4 232.(in Chinese)
Mahmood Z,Iwashita K.A simulation study of microstructure evolution inside the shear band in biaxial compression test[J].International Journal for Numerical & Analytical Methods in Geomechanics,2011,35(6):652–667.
蒋尧,杨贵,刘汉龙.堆石料双轴试验数值模拟研究[J].防灾减灾工程学报,2013,33(3):300-304. Jiang Y,Yang G,Liu H L.Effect of particle on simulating particle breakage of rockfill by boaxial tests[J].Journal of Disaster Prevention and Mitigation on Engineering,2013,33(3):300-304.(in Chinese)
龚健,刘君.颗粒形状对散体材料剪切行为的影响[C]∥颗粒材料计算力学会议,兰州:兰州大学出版社,2014:68-73. Gong J,Liu J.Effect of particle shape on shear behavior of bulk materials[C]∥Proceedings of the conference on Computational Mechanics for granular materials,Lanzhou:Lanzhou University Press,2014:68-73.(in Chinese)
石崇,徐卫亚.颗粒流数值模拟技巧与实践[M].北京:中国建筑工业出版社,2015. Shi Ch,Xu W Y.Technique and practice of numerical simulation of particle flow[M].Beijing:China Architecture & Building Press,2015.(in Chinese)
吴继敏.应用图像分析法评价花岗岩结构特征[J].河海大学学报(自然科学版),1998(4):1-7. Wu J M.Estimation of granite texture characteristics by image analysis[J].Journal of Hohai University(Natural Science),1998(4):1-7.(in Chinese)
0
Views
582
下载量
5
CSCD
Publicity Resources
Related Articles
Related Author
Related Institution
苏公网安备32010202012147号