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Scale effects in soils engineering
15 2A
1484 RAMANI,RV PENNSYLVANIA STATE UNIV.USA Surface mining of coal. Annual review for !973. 3F~ IT, 13R. MINING ENGINEERING, AIME, V26, N2, FEB. 1 974, P87-8 9.
Influence of dynamic loads due to explosions or earthquakes 1485 MORI, Y UNIV oTOHUKU, SENDAI, J KAWAKAMI, F UNIV. TOHUKU, SENDA, J Earthq%~ke response of fill-type dams. 29F,7T,3R. TECHNOL. REP. TOHOKU UNIV.V38, N1,1973, P37-65. The authors have st~dled the rhquake response l~operties of fill-type dams by model tests an by observations on actual dams.~ Detailed oservations and analyses of two dams have been carried out. One dam is an earth dam 40.8m high, the other is a rock-fill dam 21.4m high. Results from similar studies on other dams are also considered~.
Examples of how model theory may be applied to soils engineering are discussed. In particular the problem of consolidation analysis is investigated. Ways are demonstrated by which model theory can be applied to evaluate effects of secondary consolidation and differences between laboratory procedures and the actual course of settlement in the field problem. Auth. 1489 JARVIS, CL AUSTRALIAN NAT. UNIV. CANBERRA, AUS On the vari~uce of the stationsry probability vector for a finite dam. 3T, 5R. J. HYDROLOGY, V21, N3, MAR. 1974, P291- 297. A simple numerical technique is discussed which is used for estimating the variance of the stationary probability vector for the finite dam. The method relies upon the constancy of a gradient matrix in the vicinity of the solution and a simple numerical differentiation technique is found to be adequate. An example of the calculation is given by applying the method to streamflow data previously used in an application of Moran's theory of dam to the 0rd River project, Western Australia.
Experimental and numerical techniques 1486 SEMINAR Advances in Cc~putatiomal methods in atructursl engineering. Proc. 2nd. US-Japan Seminar on Matrix Methods of Structural Analysis and Design, August 1972. Figs,Tabls, Refs. UAH PRESS,UNIV.ALABAMA, USA, DEC. 1972, 789P. This volume, edited by J.T. Oden, R.W. Clough and Y. Yamamoto contains papers on: I. Basle theGry; 2. D y ~ c s ; 3. Nonlinear analysis; 4. Progrsmm~ developmerit; and 5. Applications. SC~e papers of special interest are: l° Basis for formulation of finite element models, by C.A. Felippa; 2. Finite element analysis of dynamic response, by R.W. Clough and K.J. Bathe; 3. PlasticityTheory and finite element applications, by H. Armen, H.S. La,rlne and A.B. Pifko; 4. Survey of general Ix~'pose progrsnm~s for finite element analysis, by P.V. Meriel; and 5. Applications of finite element analysis, by R.H. Gallagher;
C o m m i n u t i o n of Rocks H~STIJ UNIVob'fAH, SALT LAKE CITY, USA SMITH, R UNTV. NEVADA, RENO, USA SC~ASU~ARAN, P COLOMBIA UNIV.NEW YORK, USA Mineral prOcessing fundementals. Annual review for 1973. IF,45R. MINING ENGINEERING, AIME, V26, N2, FEB. 1974, P77-80. New Im~ocesses which have been reported during 1973 are reviewed and papers l~resented at meetings and symposia are discussed. The S r ~ e r process, a possible alternative to eonventlor~ size reduction in which particle fracture is introduced by the sudden release of air, gas or steam under pressure, has been a controversial research item in ccmmlnutlon. Interest is increasingly shown in the development of mathematical models for mineral processing systems.
1487 KOI~,T UNIV. KYOTO, J KAMEDA, H UNIV. KYOTO, J Reliability theory of structures with strength degradation in load history. 12F,6R. M~MOIRS FAC.ENGNG.KYOTO UNIV.V35,~,OCT.1973,P331-360. The theory of structural reliability is developed for repeated loads considering strength degradation dependent on the load intensity, and taking into account the non-failure effect; It is concluded that the results obtained can be applied to the future reliability of existing structures to repeated loads, when they have in the past withstood loads of known intensities with considerable strength degradation. The reliability theory developed in this study would be useful in the estimation of structural reliability against loads with a relatively small number of applications and severe intensity.
1488 SMITH, ML IDAHO STATE UNIV.POCATWrIO, USA ROBINSON, L IDAHO STATE UNIV.POCAT~ID,USA Scale effects in soils engineering. Proc. llth Ann. Symposium Engng.Geol. and Soils Engng. Idaho, 1973. IF,7R. IDAHO DEPT.HIGHWAYS, NOV. 1973, P277-289. For those areas of soils engineering not admitting of acceptable analytic solution, some amount of model testing is employed to obtain needed information. Model theory provides the requirements for design and operation of these models, and, in effect, allows the system to solve its own defining equation. Many problems in soils engineering fall into this category.
Rock fracture under dynamic stresses 1491 FILIPPOVICH,VV LrfKZN,VI Frozen ground breaker. In Russian. SOVIET INVENTIONS ILLUSTRATED, SECTION 3 MECH. AND GENERAL. SOVP-375355,U(47), 197B, P.U~. 1492 LAURIELLO, PJ Bk~.L LABS .WHIPPANY, NJ .USA Thermal fracturing of hard crystalline rock. Symposium. In New Horizons in Rock Mechanics. Abstract. PROC.14TH SYMPOSIUM ON ROCK MECHANICS, ASCE, NEW YORK, 1973, P751 • The thermoelastie stresses and resulting brittle fractures due to heating over a circular area of a convectively cooled rock boundary by either a constant flux or constant temperature heat source was investigated. An in-situ rock mass was modelled as a semiinfinite space. The rock considered was a hard, brittle, crystalline type which is known to be linearly elastic, isotropic, and homogeneous with temperture independent properties ; Auth.
1484 RAMANI,RV PENNSYLVANIA STATE UNIV.USA Surface mining of coal. Annual review for !973. 3F~ IT, 13R. MINING ENGINEERING, AIME, V26, N2, FEB. 1 974, P87-8 9.
Influence of dynamic loads due to explosions or earthquakes 1485 MORI, Y UNIV oTOHUKU, SENDAI, J KAWAKAMI, F UNIV. TOHUKU, SENDA, J Earthq%~ke response of fill-type dams. 29F,7T,3R. TECHNOL. REP. TOHOKU UNIV.V38, N1,1973, P37-65. The authors have st~dled the rhquake response l~operties of fill-type dams by model tests an by observations on actual dams.~ Detailed oservations and analyses of two dams have been carried out. One dam is an earth dam 40.8m high, the other is a rock-fill dam 21.4m high. Results from similar studies on other dams are also considered~.
Examples of how model theory may be applied to soils engineering are discussed. In particular the problem of consolidation analysis is investigated. Ways are demonstrated by which model theory can be applied to evaluate effects of secondary consolidation and differences between laboratory procedures and the actual course of settlement in the field problem. Auth. 1489 JARVIS, CL AUSTRALIAN NAT. UNIV. CANBERRA, AUS On the vari~uce of the stationsry probability vector for a finite dam. 3T, 5R. J. HYDROLOGY, V21, N3, MAR. 1974, P291- 297. A simple numerical technique is discussed which is used for estimating the variance of the stationary probability vector for the finite dam. The method relies upon the constancy of a gradient matrix in the vicinity of the solution and a simple numerical differentiation technique is found to be adequate. An example of the calculation is given by applying the method to streamflow data previously used in an application of Moran's theory of dam to the 0rd River project, Western Australia.
Experimental and numerical techniques 1486 SEMINAR Advances in Cc~putatiomal methods in atructursl engineering. Proc. 2nd. US-Japan Seminar on Matrix Methods of Structural Analysis and Design, August 1972. Figs,Tabls, Refs. UAH PRESS,UNIV.ALABAMA, USA, DEC. 1972, 789P. This volume, edited by J.T. Oden, R.W. Clough and Y. Yamamoto contains papers on: I. Basle theGry; 2. D y ~ c s ; 3. Nonlinear analysis; 4. Progrsmm~ developmerit; and 5. Applications. SC~e papers of special interest are: l° Basis for formulation of finite element models, by C.A. Felippa; 2. Finite element analysis of dynamic response, by R.W. Clough and K.J. Bathe; 3. PlasticityTheory and finite element applications, by H. Armen, H.S. La,rlne and A.B. Pifko; 4. Survey of general Ix~'pose progrsnm~s for finite element analysis, by P.V. Meriel; and 5. Applications of finite element analysis, by R.H. Gallagher;
C o m m i n u t i o n of Rocks H~STIJ UNIVob'fAH, SALT LAKE CITY, USA SMITH, R UNTV. NEVADA, RENO, USA SC~ASU~ARAN, P COLOMBIA UNIV.NEW YORK, USA Mineral prOcessing fundementals. Annual review for 1973. IF,45R. MINING ENGINEERING, AIME, V26, N2, FEB. 1974, P77-80. New Im~ocesses which have been reported during 1973 are reviewed and papers l~resented at meetings and symposia are discussed. The S r ~ e r process, a possible alternative to eonventlor~ size reduction in which particle fracture is introduced by the sudden release of air, gas or steam under pressure, has been a controversial research item in ccmmlnutlon. Interest is increasingly shown in the development of mathematical models for mineral processing systems.
1487 KOI~,T UNIV. KYOTO, J KAMEDA, H UNIV. KYOTO, J Reliability theory of structures with strength degradation in load history. 12F,6R. M~MOIRS FAC.ENGNG.KYOTO UNIV.V35,~,OCT.1973,P331-360. The theory of structural reliability is developed for repeated loads considering strength degradation dependent on the load intensity, and taking into account the non-failure effect; It is concluded that the results obtained can be applied to the future reliability of existing structures to repeated loads, when they have in the past withstood loads of known intensities with considerable strength degradation. The reliability theory developed in this study would be useful in the estimation of structural reliability against loads with a relatively small number of applications and severe intensity.
1488 SMITH, ML IDAHO STATE UNIV.POCATWrIO, USA ROBINSON, L IDAHO STATE UNIV.POCAT~ID,USA Scale effects in soils engineering. Proc. llth Ann. Symposium Engng.Geol. and Soils Engng. Idaho, 1973. IF,7R. IDAHO DEPT.HIGHWAYS, NOV. 1973, P277-289. For those areas of soils engineering not admitting of acceptable analytic solution, some amount of model testing is employed to obtain needed information. Model theory provides the requirements for design and operation of these models, and, in effect, allows the system to solve its own defining equation. Many problems in soils engineering fall into this category.
Rock fracture under dynamic stresses 1491 FILIPPOVICH,VV LrfKZN,VI Frozen ground breaker. In Russian. SOVIET INVENTIONS ILLUSTRATED, SECTION 3 MECH. AND GENERAL. SOVP-375355,U(47), 197B, P.U~. 1492 LAURIELLO, PJ Bk~.L LABS .WHIPPANY, NJ .USA Thermal fracturing of hard crystalline rock. Symposium. In New Horizons in Rock Mechanics. Abstract. PROC.14TH SYMPOSIUM ON ROCK MECHANICS, ASCE, NEW YORK, 1973, P751 • The thermoelastie stresses and resulting brittle fractures due to heating over a circular area of a convectively cooled rock boundary by either a constant flux or constant temperature heat source was investigated. An in-situ rock mass was modelled as a semiinfinite space. The rock considered was a hard, brittle, crystalline type which is known to be linearly elastic, isotropic, and homogeneous with temperture independent properties ; Auth.