Geomechanics and Geotechnics: From Micro to Macro

Soils are composed of grains but they are generally treated as continua in the classical framework of geomechanics. Their macroscopic response under loading, such as their non-linearity, yielding and anisotropy, is controlled by their micro-structure, the characteristics of the grains and the disposition of contacts between them. There have been rapid advances in technology both to investigate the microscopic properties of soils, and to simulate their granular behaviour explicitly through Discrete Element Method (DEM). DEM was originally used to reproduce element tests, but it is now being advocated for boundary-value problems. Geomechanics and Geotechnics: From Micro to Macro includes 174 peer-reviewed papers presented at the International Symposium on Geomechanics and Geotechnics: From Micro to Macro (IS-Shanghai 2010, Shanghai, China, 10-12 October 2010). The symposium provided an opportunity for the exchange of ideas and information on experiments, numerical models and engineering applications related to the discrete nature of geomaterials. The main goal was to explore further advances in the use of micro-geomechanical approaches, and by doing so to improve the understanding of macro-geomechanical phenomena by offering experiments, constitutive relations, numerical analyses and engineering applications associated with the discrete nature of geomaterials. Geomechanics and Geotechnics: From Micro to Macro will be of interest to academics and engineers involved in Soil Mechanics, Geomechanics, Geotechnical Engineering, Geoengineering and Civil Engineering.

VOLUME 1 Part I: Micro and Macro characterization Experimental investigation on micro-contact laws of granules bonded with cementM. Jiang, Y. Xiao & Y. Sun A stress-strain modeling approach for soils: From micro to macroC.S. Chang Multiscale modeling and characterization of granular matter: From grain kinematics to continuum mechanicsC. Avila & J. Andrade Micro-morphological changes in granular soilsF.N. Altuhafi & M.R. Coop A microstructure-based constitutive model for the hydro-mechanical coupling in compacted clay/sand mixturesY.-J. Cui, A.-M. Tang, C. Loiseau & P. Delage Shear failure development in compacted bentonite specimensT. Kodaka, Y. Teramoto, T. Hirate, Y. Motoyoma, Y. Higo & F. Oka Measurements of local distortion in shear deformed granular materialH. Yamamoto & H. Kunizawa Modeling of unsaturated soil considering the effect of saturation directlyF. Zhang, X. Bao & T. Kariya Micromechanical modeling for cyclic behavior of sandZ.-Y. Yin, C.S. Chang & P.-Y. Hicher Analytical and numerical solutions to bifurcation in three-dimensional stressesD.A. Sun, L. Chen & W. Zhen The structure characteristics of unsaturated expansive soilsL. Miao,Y. Cui & F. Wang A microstructure-based numerical simulation of visco-elastic properties of asphalt concrete with Semi-Circular Bending testX. Li, G. Wang & F. Feng Degradation effects at microstructural scale and their consequences on macroscopic behaviour of a slightly weathered siltstoneJ.A. Pineda, E. Romero, S. Gómez & E.E. Alonso Studies on the disturbed state concept constitutive model of the rockfill materialsJ. Pan, G. Wang, R. Bao & H. Xu Test analysis on mechanical properties of soil cement mixturesK. Ma, Y. Xie & G. Long The experimental study on the response pattern of wave-induced pore pressure on sandy bedJ. Zhong, Y. Zheng & B. Vu Quadric surface approximation of failure criteria for granular materials in plane problemY. Satoh, K. Suzuki, K. Kaneko & K. Kumagai The effects of particle friction and crushing on macro-mechanical behavior of granular materialsX. Chu, L. Wang & Y. Xu Consideration of the compressibility of soil mixed with deformable particles—classification of the compressive components by using rod-stack model testsT. Kimata, K. Shimada & Y. Masaki Effect of consolidation ratio on high relative density silt under cyclic principal stress rotationY. Shen, J. Yan, P. Zhang & H. Liu Electrical resistivity anomalies applied to describing microstructure change for cemented-soilX. Yu & Z. Qi Effects of wedge angle on the ductile failure and the distribution of microcracks for indentation tests on rock-like materialH.W. Liu, L.H. Chen, Y.C. Chen & Y.S. Lin Coarse granular soil state-dependent constitutive model considered micromechanics alterationY.-F. Jia & S.-C. Chi Investigation on mechanical properties and constitutive model of lime-fly ash loessY. Zhang, Z. Zhang & J. Zhao Micromechanical model of concrete under water lateral confinementD. Zheng & X. Li Experimental studies on microstructure and collapsibility behavior of unsaturated loessL. Gao, M. Luan & Q. Yang Centrifuge modeling for wave loading on a cylindrical breakwaterG. Xu, Z. Cai, X. Gu, Y. Li, J. Wu, S. Xie & Y. Wang Investigation on elasto-plastic consolidation question based on numerical modeling methodT. Cheng & K. Yan Stress-strain behavior of remoulded cement-treated Singapore marine clayH. Xiao & F.H. Lee Shear properties of waste tire-bottom ash mixture with various particle sizes of waste tireY.T. Kim, H.S. Kang & K.Y. Jo A constitutive model for unsaturated natural soilsX. Jin, C. Zhao, T. Chen & Y. Liu Failure criterion of cross-anisotropic soils with the method of macro-micro incorporationX. Li, M. Huang, J. Qian & L. Kong Relation between suction changes in compacted soils and evolution of micro-structure during compressionK. Cui, P. Défossez, Y.-J. Cui & G. Richard Experimental study on evolution of meso-structure of intact Q2 loess during wettingC. Shen, X. Fang, Z. Chen & Z. Zhou Elastic waves in salt-cemented granular soilsY.-H. Eom, Q.H. Truong, Y.-H. Byun, M.K. Tran & J.-S. Lee Characteristics of pumice particle using X-ray CT scanningN. Kikkawa, R.P. Orense & M.J. Pender Full-grade concrete strength under long-term sustained loadingD. Zheng, C.R. Zhang & W.W. Li Design and verification of portable direct shear tester for colluviumK.-J. Shou & Y.W. Lin Micro and macro approaches for characterization of porosity depending on the weathering degreeA.S.M. Hasan, Z. Mohamed & K.-I. Song A new insight of 3-D microfabric analysis of unconsolidated marine sediments:Examples from north atlantic 300-meter long coresK. Kawamura Probability of damage to archaeological inclusions in a sandy matrixA.F.L. Hyde, C.M. Jackson, I. Hassan & L.A. Howie Change of instantaneous strength of rock in uniaxial compressive creep testC. She, K. Li & X. Cui Study on model of coupled behavior of consolidation and creep for soilB. Tang & J. Lei Support vector machine model for the relationship between physico-mechanical indexes and microstructure parameters of soft soilY. Liu & Z. Li Study on micromechanism, physical and mechanical indexes of swamp soilQ. Hu, L. Li, B. Xiao & H. Tang Influence of obstacle angle on granular flowY. Fan, S. Wang, E. Wang & X. Liu Variational inequality formulation of discontinuous deformation analysisW. Jiang & H. Zheng Natural shear strength for municipal solid waste Z. Zhang, D. Wu & Y. Chen Study on microstructure characteristics and compaction effects of ISS-reinforced red clayX. Lu, W. Xiang, Y. Wu & Y. Wu Study on physical and chemical characteristics of mortar specimens subjected to hydrochloric acid attackR. Huo, C. Ning, J. Li & Y. Yao Micro-structure analysis of dynamic replacement with riprapping and removing siltX. Liu, W. Si & C. Zhu An ellipse failure model for lightweight aggregate concreteW. Wang Test and study the microstructure of polluted soil by acid and alkali in laboratoryC. Zhu, D. Li, H. Liu & G. Yang Analytical solutions for stresses and displacements of cylindrical cavity expansion based on extended SMP criterionJ. Zou, L. Zhao, J. Peng, L. Peng & X. Yang Rock matrix-fractured media model for heterogeneous and fractured coal bedC. Zhang, Q. Zhao & C. Zhang An elasto-plastic model for aggregates considering particle crushingH. Sun, Y. Pan, H. Zhou & M. Huang Localization of concrete fatigue defects in concrete CT images based on fractal theoryX. Zhu, J. Li & L. Wen Experimental study on wave-induced liquefaction in sandy silt seabedB. Vu, Y. Zheng & J. Zhong Analyzing the evolution of grains and contacts in sand under loadE. Andò, S.A. Hall, G. Viggiani, J. Desrues & P. Bésuelle Research on deep clay high pressure triaxial unloading and structural constitutive modelR. Sun,W. Li & W. Wang Modified Mohr-Coulomb failure criterion: Taking influence of unloading rate into considerationW. Chai & W. Li Testing study of relation between temperature and electrical resistivity of sedimentary rockF. Zhang & C. Zeng Arch shapes and principal stress trajectories in planar heap of dry sandT. Pipatpongsa Numerical simulation on the effect of filled granule shape on fracture seepageJ. Liu, P. Han & A. Nakayama Micro mechanics study of granular soil based on the confined compression testsL. Cao, W. Liu, X. Li, X. Zhao & H. Zhang Quantifying soil micro-structure using fractals under dynamic replacement with rip rapping and removing siltW. Chen Experimental research on Poisson’s ratio of sandy soilY. Sun, L. Shao & Z. Fan Experimental study on evolution of meso-structure of intact Q2 loess during loadingX. Fang, C. Shen, Z. Chen & Z. Zhou Photoelastic study of force chainsJ. Liu, Q. Sun, F. Jin & Z. Bi Microscale parameters variation in biaxia