- Email: [email protected]
Prediction of salt behavior using RHS method
iteration of the solution process. Verification of the scheme is demonstrated through various analyses of circular excavations in regularly jointed media. Auth.
871149 Surface deformation due to inflation of an arbitrarily triaxiaf
ellipsoidal cavity in an elastic half-space.
reference to Eilauea
oriented
Hith
volcano, Hawaii
Davis. P M J Geophys Res V91, A’B7. 10 June 1986. P74_)9--138
Stress analysis See also: 871059. 871060. 871061. 871094, 871098. 871099,
871100,
871146 Numerical Laplace-Fourier transform inversion technique for iayered-soil consolidation problems: I. Fundamental solutions and validation Vardoulakis, I; Hampattanapanich, T Int J Num Anal Meth Geomech VIO. 1V4,July-.&g 1986, P34 7-365
Approximate expressions for surface displacements due to fluid inflation of an arbitrarily oriented ellipsoidal cavity in an elastic half-space are found using Eshelby’s elastic inclusion theory and Mindlin’s half-space point force solution. The model was applied to measured displacement on Kilauea voicane taken over a period of intrusion and eruption, with the result that a vertically elongated ellipsoidal pressure centre fits the data significantly better than a spherical one. 871150 Program predicts rock behaviour around excavations O’Hagan, R J lnst Engrs Australia VS8, N6, 4 April 1986, P_‘I-22
A fully numerical inversion scheme has been developed to solve two- and three-dimensional consolidation problems of layered soils. Consolidation due to surface loading or due to forces or sources inside the medium is examined. A series of problems has been solved and validated against existing solutions to compare feasibility and accuracy of this technique. The one major drawback of this method is that it requires the use of a large and high-speed computer due to the threedimensional nature of the discretization.
A three dimensional finite element stress analysis program has been developed which models most underground excavations. It calculates movement along cracks and joints. and cracking and damage to the intact rock, and displays results in graphical form. It is run on the Cyber 205 supercomputer.
871147 Finite layer analysis of viscoelastic layered materials Booker, J R; Small, J C Int J Num Anal Meth Geomech VIO. 1~4, July-Aug 1986. P415-430
A constitutive equation for granular materials is proposed. It assumes the existence of a yield surface and a bounding surface and isotropic-kinematic hardening. A detailed mathematical formulation of the virgin loading process, as well as stressreversal histories, is provided. It is based on the theory of plasticity incorporating a non-associated flow rule and the concept of plastic potentiat. The equation is applied to typical triaxiat problems, such as liquefaction or cyclic toading.
A numerical method of predicting creep settlements of foundations on horizontally layered soil profiles is presented. Fourier (strip loading) or Hankel (circular loading) transforms are applied to the governing equations, reducing two- or threedimensional problems to one involving a single spatial dimension, thus saving computer storage space and data preparation time. An exact solution is obtained for each layer. an improvement on conventional finite layer techniques, w*here field properties must be approximated at a number of positions within each layer. This formulation makes it possible to work with creep functions, which are relatively easy to measure in the laboratory, rather than relaxation functions, which are not.
871148 Some theoretical observatiow on conical failure criteria in principal stress state GriWths, D V Int J S&ids Struct V22. N5, 1984, PSS3-565 The properties of the conical failure criteria that lie just inside and just outside the Mohr-Coulomb surface are discussed. Expressions are developed for the maximum stress ratio predicted by these surfaces as a function of the angular stress invariant. For plane strain problems. assuming elastoplastic behaviour, the effect of Poisson’s ratio and the dilation angle on the stress paths and failure loads have been expressed in a closed form solution. Finally, the expressions are confirmed using finite element analysis of a simple boundary value problem.~Auth.
871151 General&d flow theory for sand Poorooshasb. H B; Pietruszezak, S Soils Found V26. N2. June 1986, PI-15
871152 Prediction of salt behavior using RHS method Li,WT Proc 5th Engineering MMtanics Division Specialit) Conference, Wyoming, 1-3 Aug 1984 V2, P114j-1148. Pub1 New York: ASCE, 1984 The Response History Synchronisation (RHS) method was developed to overcome the disadvantages of the conventional analytical method for predicting closure of openings in salt, using laboratory test data, and the experimental method. using in situ-measurements. The RHS method uses analytical methods. where consideration is given to time dependent nonlinear behaviour, and incorporates in situ measurements to predict structural responses. 871153 Eastieity modeling of geote&&al materials Chen, W F: Chang, T Y Proc 5th Engineering Mechanics Diuision Special+ Conference, Wyoming, I-3 Aug t9@ .V2. P1284-1287. New York: ASCE,
Pub1
1984
Some plasticity based models for describing the stress strain behaviour of soils and concrete are very briefly described and discussed. 27 refs.
Q 1986 Pergamon Journals Ltd. Reproduction
not permitted
871149 Surface deformation due to inflation of an arbitrarily triaxiaf
ellipsoidal cavity in an elastic half-space.
reference to Eilauea
oriented
Hith
volcano, Hawaii
Davis. P M J Geophys Res V91, A’B7. 10 June 1986. P74_)9--138
Stress analysis See also: 871059. 871060. 871061. 871094, 871098. 871099,
871100,
871146 Numerical Laplace-Fourier transform inversion technique for iayered-soil consolidation problems: I. Fundamental solutions and validation Vardoulakis, I; Hampattanapanich, T Int J Num Anal Meth Geomech VIO. 1V4,July-.&g 1986, P34 7-365
Approximate expressions for surface displacements due to fluid inflation of an arbitrarily oriented ellipsoidal cavity in an elastic half-space are found using Eshelby’s elastic inclusion theory and Mindlin’s half-space point force solution. The model was applied to measured displacement on Kilauea voicane taken over a period of intrusion and eruption, with the result that a vertically elongated ellipsoidal pressure centre fits the data significantly better than a spherical one. 871150 Program predicts rock behaviour around excavations O’Hagan, R J lnst Engrs Australia VS8, N6, 4 April 1986, P_‘I-22
A fully numerical inversion scheme has been developed to solve two- and three-dimensional consolidation problems of layered soils. Consolidation due to surface loading or due to forces or sources inside the medium is examined. A series of problems has been solved and validated against existing solutions to compare feasibility and accuracy of this technique. The one major drawback of this method is that it requires the use of a large and high-speed computer due to the threedimensional nature of the discretization.
A three dimensional finite element stress analysis program has been developed which models most underground excavations. It calculates movement along cracks and joints. and cracking and damage to the intact rock, and displays results in graphical form. It is run on the Cyber 205 supercomputer.
871147 Finite layer analysis of viscoelastic layered materials Booker, J R; Small, J C Int J Num Anal Meth Geomech VIO. 1~4, July-Aug 1986. P415-430
A constitutive equation for granular materials is proposed. It assumes the existence of a yield surface and a bounding surface and isotropic-kinematic hardening. A detailed mathematical formulation of the virgin loading process, as well as stressreversal histories, is provided. It is based on the theory of plasticity incorporating a non-associated flow rule and the concept of plastic potentiat. The equation is applied to typical triaxiat problems, such as liquefaction or cyclic toading.
A numerical method of predicting creep settlements of foundations on horizontally layered soil profiles is presented. Fourier (strip loading) or Hankel (circular loading) transforms are applied to the governing equations, reducing two- or threedimensional problems to one involving a single spatial dimension, thus saving computer storage space and data preparation time. An exact solution is obtained for each layer. an improvement on conventional finite layer techniques, w*here field properties must be approximated at a number of positions within each layer. This formulation makes it possible to work with creep functions, which are relatively easy to measure in the laboratory, rather than relaxation functions, which are not.
871148 Some theoretical observatiow on conical failure criteria in principal stress state GriWths, D V Int J S&ids Struct V22. N5, 1984, PSS3-565 The properties of the conical failure criteria that lie just inside and just outside the Mohr-Coulomb surface are discussed. Expressions are developed for the maximum stress ratio predicted by these surfaces as a function of the angular stress invariant. For plane strain problems. assuming elastoplastic behaviour, the effect of Poisson’s ratio and the dilation angle on the stress paths and failure loads have been expressed in a closed form solution. Finally, the expressions are confirmed using finite element analysis of a simple boundary value problem.~Auth.
871151 General&d flow theory for sand Poorooshasb. H B; Pietruszezak, S Soils Found V26. N2. June 1986, PI-15
871152 Prediction of salt behavior using RHS method Li,WT Proc 5th Engineering MMtanics Division Specialit) Conference, Wyoming, 1-3 Aug 1984 V2, P114j-1148. Pub1 New York: ASCE, 1984 The Response History Synchronisation (RHS) method was developed to overcome the disadvantages of the conventional analytical method for predicting closure of openings in salt, using laboratory test data, and the experimental method. using in situ-measurements. The RHS method uses analytical methods. where consideration is given to time dependent nonlinear behaviour, and incorporates in situ measurements to predict structural responses. 871153 Eastieity modeling of geote&&al materials Chen, W F: Chang, T Y Proc 5th Engineering Mechanics Diuision Special+ Conference, Wyoming, I-3 Aug t9@ .V2. P1284-1287. New York: ASCE,
Pub1
1984
Some plasticity based models for describing the stress strain behaviour of soils and concrete are very briefly described and discussed. 27 refs.
Q 1986 Pergamon Journals Ltd. Reproduction
not permitted