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Family of Houbolt methods for dynamic vibration problems
GEOMECHANICS ABSTRACTS General
841006 Engineering properties of fresh and decomposed igneous rocks from Hong Kong Lumb, P Engng Geol V19, N2, Aug 1983, P81-94
841001 Boundary element methods in engineering science Banerjee, P K; Butterfield, R London: McGraw-Hill, 1981, 451P
The influence of degree of decomposition on the strength and elasticity of fresh to highly decomposed igneous rocks in Hong Kong is described and summarized. Assessments of degree of decomposition by rock grade, rock quality designation, apparent porosity, ultrasonic velocity, and point load index are discussed from the point of view of estimating rock behaviour. For engineering purposes a sufficiently precise measure of decomposition could be based on the point load index, and a sufficiently reliable estimate of elastic modulus could be calculated from the ultrasonic velocity. Auth.
841002 Bibliography of Canadian contributions in the field of rock mechanics. Nineteenth Supplement - January to December 1982 Weidmark, P E CIM Bull V76, N856, Aug 1983, P96-99 841003 Family of Houbolt methods for dynamic vibration problems Thomas, R M; Addison, CA; Gladwell, I int J Num Anal Meth Geomech V7, N3, July-Sept 1983, P321-336
841007 Geology and engineering properties of laterites from liorin, Nigeria Alao, D A Engng Geol V19, N2, Aug 1983, p111-118
The well-known Houbolt method for dynamic vibration problems is extended to a class of methods suitable for a computer program implementation. Numerical results for a variety of Houbolt methods are compared with other Backward Differentiation methods.
Three varieties of laterites (clay, gravel and crust) were identified and subjected to mineralogical, chemical and geotechnical analyses which inc!uded: identification of clay and non-clay minerals by X-ray diffraction techniques, chemical composition by X-ray fluorescence spectrometer analysis, pH of soil in water, moisture contents and specific gravity determinations, grain size analysis, compaction tests by Harvard Compaction Apparatus and unconfined compressive strength determination. The soils are not expected to perform very well as concrete aggregates since they contain high amounts of silica and iron oxide which are known to have deleterious effects on construction materials, particularly concrete aggregates.
841004 Development of rock mechanics in the world and Turkey (In Turkish) Yuzer, E Kaya Mek Bul NI, Oct 1982, P5-7 Report on world developments in rock mechanics, particularly activities in government offices and universities.
841008 Parameter estimation of a static geotechnical model using a Bayes' approach Cividini, A; Maier, G; Nappi, A Int J Rock Mech Min Sci V20, N5, Oct 1983, P215-226
Properties of Rocks and Soils See also: 841293
Parameters concerning the geometry (length and location of an inclusion) and the material properties (elastic moduli) of a geotechnical system, modelled as linearly elastic and in plane strain, are estimated on the basis of the knowledge of displacements due to given loads. An iterative estimation algorithm is used for the calculation.
841005 On pressure distribution and effective stress in unsaturated soils Groenevelt, P H; Kay, B D Can J Soil Sci V61, N2, May 1981, P431-443
841009 Influence of tailings particles on physical and mechanical properties of fill (In Chinese) Liu Keren; Sun Kainian Nonferrous Met V35, N3, Aug 1983, P14-22
Presents a theory for the distribution of load pressures over the different phases in an unsaturated soil, providing differential and integral relations between the equilibrium liquid pressure, the equilibrium solid pressure and the load pressure. Mechanical and thermodynamic models are presented by which the effective stress in unsaturated soils is defined and this value is then calculated for a certain state of a 'black earth' soil, containing 60 per cent clay, mainly montmorillonite.
RM'~S 2,/,--O
Percolation rate tests were carried out on tailings with varying fines content to investigate their use as underground backfill material. Results indicated a limited increase in compressive strength of cemented backfill with increase in fines content and it is concluded that such an increase would improve the backfill applications of tailings.
1A
841006 Engineering properties of fresh and decomposed igneous rocks from Hong Kong Lumb, P Engng Geol V19, N2, Aug 1983, P81-94
841001 Boundary element methods in engineering science Banerjee, P K; Butterfield, R London: McGraw-Hill, 1981, 451P
The influence of degree of decomposition on the strength and elasticity of fresh to highly decomposed igneous rocks in Hong Kong is described and summarized. Assessments of degree of decomposition by rock grade, rock quality designation, apparent porosity, ultrasonic velocity, and point load index are discussed from the point of view of estimating rock behaviour. For engineering purposes a sufficiently precise measure of decomposition could be based on the point load index, and a sufficiently reliable estimate of elastic modulus could be calculated from the ultrasonic velocity. Auth.
841002 Bibliography of Canadian contributions in the field of rock mechanics. Nineteenth Supplement - January to December 1982 Weidmark, P E CIM Bull V76, N856, Aug 1983, P96-99 841003 Family of Houbolt methods for dynamic vibration problems Thomas, R M; Addison, CA; Gladwell, I int J Num Anal Meth Geomech V7, N3, July-Sept 1983, P321-336
841007 Geology and engineering properties of laterites from liorin, Nigeria Alao, D A Engng Geol V19, N2, Aug 1983, p111-118
The well-known Houbolt method for dynamic vibration problems is extended to a class of methods suitable for a computer program implementation. Numerical results for a variety of Houbolt methods are compared with other Backward Differentiation methods.
Three varieties of laterites (clay, gravel and crust) were identified and subjected to mineralogical, chemical and geotechnical analyses which inc!uded: identification of clay and non-clay minerals by X-ray diffraction techniques, chemical composition by X-ray fluorescence spectrometer analysis, pH of soil in water, moisture contents and specific gravity determinations, grain size analysis, compaction tests by Harvard Compaction Apparatus and unconfined compressive strength determination. The soils are not expected to perform very well as concrete aggregates since they contain high amounts of silica and iron oxide which are known to have deleterious effects on construction materials, particularly concrete aggregates.
841004 Development of rock mechanics in the world and Turkey (In Turkish) Yuzer, E Kaya Mek Bul NI, Oct 1982, P5-7 Report on world developments in rock mechanics, particularly activities in government offices and universities.
841008 Parameter estimation of a static geotechnical model using a Bayes' approach Cividini, A; Maier, G; Nappi, A Int J Rock Mech Min Sci V20, N5, Oct 1983, P215-226
Properties of Rocks and Soils See also: 841293
Parameters concerning the geometry (length and location of an inclusion) and the material properties (elastic moduli) of a geotechnical system, modelled as linearly elastic and in plane strain, are estimated on the basis of the knowledge of displacements due to given loads. An iterative estimation algorithm is used for the calculation.
841005 On pressure distribution and effective stress in unsaturated soils Groenevelt, P H; Kay, B D Can J Soil Sci V61, N2, May 1981, P431-443
841009 Influence of tailings particles on physical and mechanical properties of fill (In Chinese) Liu Keren; Sun Kainian Nonferrous Met V35, N3, Aug 1983, P14-22
Presents a theory for the distribution of load pressures over the different phases in an unsaturated soil, providing differential and integral relations between the equilibrium liquid pressure, the equilibrium solid pressure and the load pressure. Mechanical and thermodynamic models are presented by which the effective stress in unsaturated soils is defined and this value is then calculated for a certain state of a 'black earth' soil, containing 60 per cent clay, mainly montmorillonite.
RM'~S 2,/,--O
Percolation rate tests were carried out on tailings with varying fines content to investigate their use as underground backfill material. Results indicated a limited increase in compressive strength of cemented backfill with increase in fines content and it is concluded that such an increase would improve the backfill applications of tailings.
1A