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Effects of sampling and construction stress paths on stress-strain properties of a sand (in English)
813011/~ IN SITU WEDGE SHEAR TEST (IN ITALIAN) Cascini, L Riv Ital Geotec, VI6, NI, Jan-March 1980, P63-69 Describes the principles of the test, apparatus, test procedure and compares a series of laboratc~y and in situ results. 813045 ANISOTROFY OF THE UNDRAINED STRENGTH OF NOMWALLY CONSOLIDATED CLAYS (IN ITALIAN) Cavalera, L; Scarpelli, G Riv Ital Geotec, V16, N2, April-June 1980, P181-190 Presents a thearetical analysis of anisotropy as experienced in trisxlal tests anl compares theoretical predictions with experiments on Fitm~Icino clays and other materials. 8130~6 YIELDING OF WEATHERED BANGKOK CLAY Balasubramaniam, A S; Hwang Zue-Ming Soils Found, V20, N2, J%z~e 1980, Pl-15 Reports a study of %2e deformation characteristics of Bamgkok clay u n d ~ a variety of stress paths. 813047 SHEARING DEFORMATION OF G ~ MATERIALs. TECHNICAL NOTE Moroto, N Soils Found, V20, N2, June 1980, PI13-I18 813048 FINITE LAY]~ ANALYSIS OF NON-HOMOGENEOUS SOILS Rowe, R K; Booker, J R University of Sydney, School of Civil Engineering, research report R372, Sept 1980,
33P Presents a finite layer aPlroach for the analysis of layered and continuously varying cross-anisotropic elastic soll profiles, in which there is no horizontal variation in the soil prope/-hies. The technique is computationally more economical than the finite element method anl is particularly suitable for 3-dimensional problems and problems involving deep soll layers. The method is applied to uniformly loaded strip and circular footings resting on a soll with a homogeneous crust underlain by a main deposit whose stiffness increases linearly with depth.
Surface properties THE BASIC 8130~9 SUGGESTED TECHNIQUE FOR D ~ N I ~ G FRICTION ANGLE OF ROCK SURFACES USING CORE. TECHNICAL NOTE Stimpson, B Int J Rock Mech Min Sci, VI8, NI, Feb 1981, F63-65 Describes a simple tilting test for measuring th~ critical a r ~ e of sliding of core stu-faces in contact, and gives results on dry and saturated limestone core.
Time dependent behaviour 813050 FINITE ELeMEnT SOLUTION OF N O N - L I ~ CREEP PRO~S IN ROCKS Gioda, G Int J Rock Mech Min Sci, V18, NI, Feb 1981,
P35-~6
A n.~nerical procedure is presented, belongir~ to the class of 'evolutive' aplroaches, for the finite element soltltion of stress axmlysis problems ir_vc]vlr~£ ro~-linear c r ~ l ~ ol rocks. The aplmoach proposed allows both for r,on-linear revcrsi~le behavlour (nor.-lir~sr visco~Tasticity) ar~ for non-linear non-rev~rsiblle behavlour (viscoplasticity), eithe/ assc~:~ated ar non. ass(misted flow rules can be cor.-Idered. Primary, sec ).:k~ry ar~ tertiary creep can be accotuf%.~d for by supplying suitable laws governirg the variation of material parameters (sunh as viscosity) with stresses amd strains. The n~nerical procedure is based on Newmark's time integration scheme, along each l o a d i ~ t i m e step quadrstic varation of the stress amd strain fields and linear variation of_ the material parameters are assumed. As an example a hollow cylinder test on a rock sample behaving according to a simple non-linear viscoplastic rheological model ~s simulated n~x~Ically. Auth. 813051 STOCHASTIC MODEL OF THE CREEP OF SOILS Pusch, R; Feltham, P Geotechmlque, V30, N~, Dec 1960, P497-506 Discusses the extension of an earlier model of the authors, applied to illltic clay, to the creep of structurally sensitive aggregated clays, amd sc~e clays of lesser sensitivity. 813052 CC~I~A'~ SIMULATION OF CREEP OF CLAY Pusch, R; Feltham, P J Geotech Eng~g Div ASCE, V107, NGT1, Jan
1981, P95-i04 Applied soil mechanics still makes use of empirical laws for the prediction of creep strain since no generally accepted creep theory is yet available. The object of the paper is to present an improved, physical creep model and its mathematical ar~logy, and to examine the creep rate according_ to this model by means of a c~,~ater cede. The model yields a creep law which appears to have a wide scope amd it thus provides a promising basis for representing creep data, and a ratior~l starting point for creep studies which involve structural changes. Auth. AND HEAVE IN CLAYS. 813o53 PREDICTION OF ~ N T S TECHNICAL NOTE Kodandaramaswam~, K; Narasimha Rao, S Can Geotech J, V17, N4, Nov 1980, F623-631 A simple hyperbolic relationship is l~oposed to characterise displacements with time fc~ structures foumded in clayey soils. These displacements are due both to settlement and swelling. The ultimate displacement has been brought within the mathematical formulations. The data published by several investigators for a number of field cases have been used to establish this. The agreement between the observed and ~redict~d values of displacement is good. The findlmgs of this investigation have a potential value in the application to field problems. 813o5~ CREEP OF CLAY SOILS: A BIBLIOGRAPHICAL STUDY (IN Z ~ W C ~ ) Felix, B Paris: Labaratcire Central des Ponts et Chaussees, report LFC 93, May 1980, 231P R e v i ~ s research mainly of Soviet arlgin, concentratimg on the work of S R Meschyan publiahed between 1967 and 1974. Avail: LCFC, 58 Boulevard Lefebvre, 75732 Paris Cedex 15, France
33P Presents a finite layer aPlroach for the analysis of layered and continuously varying cross-anisotropic elastic soll profiles, in which there is no horizontal variation in the soil prope/-hies. The technique is computationally more economical than the finite element method anl is particularly suitable for 3-dimensional problems and problems involving deep soll layers. The method is applied to uniformly loaded strip and circular footings resting on a soll with a homogeneous crust underlain by a main deposit whose stiffness increases linearly with depth.
Surface properties THE BASIC 8130~9 SUGGESTED TECHNIQUE FOR D ~ N I ~ G FRICTION ANGLE OF ROCK SURFACES USING CORE. TECHNICAL NOTE Stimpson, B Int J Rock Mech Min Sci, VI8, NI, Feb 1981, F63-65 Describes a simple tilting test for measuring th~ critical a r ~ e of sliding of core stu-faces in contact, and gives results on dry and saturated limestone core.
Time dependent behaviour 813050 FINITE ELeMEnT SOLUTION OF N O N - L I ~ CREEP PRO~S IN ROCKS Gioda, G Int J Rock Mech Min Sci, V18, NI, Feb 1981,
P35-~6
A n.~nerical procedure is presented, belongir~ to the class of 'evolutive' aplroaches, for the finite element soltltion of stress axmlysis problems ir_vc]vlr~£ ro~-linear c r ~ l ~ ol rocks. The aplmoach proposed allows both for r,on-linear revcrsi~le behavlour (nor.-lir~sr visco~Tasticity) ar~ for non-linear non-rev~rsiblle behavlour (viscoplasticity), eithe/ assc~:~ated ar non. ass(misted flow rules can be cor.-Idered. Primary, sec ).:k~ry ar~ tertiary creep can be accotuf%.~d for by supplying suitable laws governirg the variation of material parameters (sunh as viscosity) with stresses amd strains. The n~nerical procedure is based on Newmark's time integration scheme, along each l o a d i ~ t i m e step quadrstic varation of the stress amd strain fields and linear variation of_ the material parameters are assumed. As an example a hollow cylinder test on a rock sample behaving according to a simple non-linear viscoplastic rheological model ~s simulated n~x~Ically. Auth. 813051 STOCHASTIC MODEL OF THE CREEP OF SOILS Pusch, R; Feltham, P Geotechmlque, V30, N~, Dec 1960, P497-506 Discusses the extension of an earlier model of the authors, applied to illltic clay, to the creep of structurally sensitive aggregated clays, amd sc~e clays of lesser sensitivity. 813052 CC~I~A'~ SIMULATION OF CREEP OF CLAY Pusch, R; Feltham, P J Geotech Eng~g Div ASCE, V107, NGT1, Jan
1981, P95-i04 Applied soil mechanics still makes use of empirical laws for the prediction of creep strain since no generally accepted creep theory is yet available. The object of the paper is to present an improved, physical creep model and its mathematical ar~logy, and to examine the creep rate according_ to this model by means of a c~,~ater cede. The model yields a creep law which appears to have a wide scope amd it thus provides a promising basis for representing creep data, and a ratior~l starting point for creep studies which involve structural changes. Auth. AND HEAVE IN CLAYS. 813o53 PREDICTION OF ~ N T S TECHNICAL NOTE Kodandaramaswam~, K; Narasimha Rao, S Can Geotech J, V17, N4, Nov 1980, F623-631 A simple hyperbolic relationship is l~oposed to characterise displacements with time fc~ structures foumded in clayey soils. These displacements are due both to settlement and swelling. The ultimate displacement has been brought within the mathematical formulations. The data published by several investigators for a number of field cases have been used to establish this. The agreement between the observed and ~redict~d values of displacement is good. The findlmgs of this investigation have a potential value in the application to field problems. 813o5~ CREEP OF CLAY SOILS: A BIBLIOGRAPHICAL STUDY (IN Z ~ W C ~ ) Felix, B Paris: Labaratcire Central des Ponts et Chaussees, report LFC 93, May 1980, 231P R e v i ~ s research mainly of Soviet arlgin, concentratimg on the work of S R Meschyan publiahed between 1967 and 1974. Avail: LCFC, 58 Boulevard Lefebvre, 75732 Paris Cedex 15, France