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Strain and tilt observations near an active fault
IOA
Earthquake mechanisms and effects See also abstract: 3.
74 BUFE, CG NAT. OCEAN. ATMOS. ADMIN. SAN FRANCISCO, U&~ Strain and tilt observations near an active fault. Symposlt~a. In Stability of rock slopes. 3F. 13TH SYMPOSIUM ON ROCK MECHANICS ASCE, NEW YORK,
1972,P685-69o.
The instrumentation at the stone canyon observatOry in the San Andreas fault zone is described. From observations made and data obtained it is concluded that: 1. Areal strain charges appear to be tied to temperature and precipitatior~ 2. Factors affecting the production of ground contraction may include rapid cooling of the surface by rain and waterpressure effects; 3. The Orientation of strain change ellipses appears to relate to the local geologic, topographic and tectonic regimes; and 4. A reversal of the secular southerly tilt trend correlated with fault creep and earthquake activity, indicating that this trend is of tectonic origin.
75 IBANEZ, J Notes on the dynamic calculus of buildings and soils. In Spanish. UNIV.S.A. EDITORIAL UNIV.CHILE,~ANTIAGO, 1971,53P. Some concepts on the Origin of earthquakes and the nature of the movement at the surface of the ground are outlined. They emphasize the importance of the first thrust caused by the rupture of the rock, ar~ the free vibration of the sedimentary deposits lying on it, started by that thrust. A mathematical analysis of such vibration is made in order to ascertain the periods and the shearing stresses within the soil. Numerical calculations are included: both fOr s single stratum of soil, confined and not confinml, and fOr a three strata soil. The seismic response of strUctures is presented: both by the modal dynamic method and by the static method recommended by the Chilean Code. An example of numerical calculation is presented.
76 ALITSHULER, LV PAVLOVSKY, MN Investigation of clay and blue shale under strong dyn~mlc influences. In Russian. J.APPLIED MECHANICS AND TECHNICAL PHYSICS, N1,1971, P171-176. Results of an investigation of the dynamic compressibility of a few types of sedimentary rocks are described. The dynamic adiabatic curves of four types of clay and blue shale are obtained for l~essure of up to 500 kbar. The initial sections of isentropic expansion curves were also found. The peculiarities of the shape of the curves connected with a phase conversion are explained. Limitations of the application of the law of additive construction of the adiabatic c~cves from adiabatic curves of components to the investigated complex systems are shown. 77 KOTSUBO, S TAKANI SIll,T An analysis of behaviour of layered media during earthquake by feed-back theory. TRANS. DEI~f.ENGNG. KYUSHU UNIV. FUKUOKA, J. 1973. In calculating the behaviour of layered media due to seismic wave incident from the bed rock, a method of multi-degrees of freedom system or a method of modal analysis has been applied instead of the method of wave propagation theory. In the former method, the dissipation of energy in the upper media into the bed rock cannot be explained and viscous damping is inevitably included in the equation of motion. The fundamental concepts adopted in this paper are to feed back a certain rate
of the acceleration of layered media into the acceleration of bed rock by using modal analysis. According to this theory, it is not necessary to include the viscous damping in the equation of motion and the behavlour of the layered media is reasonably calculated.
78 CROWLEY, BK UNIV. CALIF. LIVERMORE, USA Effects of porosity and saturation on shock wave response in tuffs. 23F,6T, 16R, INT. J. ROCK MECH, MIN. SCI .V10, NS, 1973, P437-464. The attenuation of a stress-wave as it propagates t h r o u ~ tuffaceous rocks of various porosities and degrees of saturation is investigated by a calculatlonal psrameter study. The equations of sta~e for the various porous anl saturated turfs considered are constructed from (I) appr~imations of the loading curves for tnffs at various grain denslties; (2) the weight per cent of water under consideratior~ (3) a loading curve for water, and (4) estimates of loss of gasfilled porosity during loading, These equations are used in one-dimensional cslculations to examine how peak radial stress and peak particle velocity sre ~ffected by porosity and saturation. The investigation was limited to the regions where peak radial stress is below about 40kbar. The results show that the peak stress at a given distance from the working POint decreases over the range from rock at grain density to rock with small amounts of either water or open void sPace, T h e atteramtion of peak particle velocities is somewhat similar to stress attenuation through the rock. However~ the particle velocity is less sensitiMe than stress to cha~ges in void frsetion or saturation of the rock,
79 EASTON, WH UNIV. SOUTHERN CALIF. LOS ANGELEs, USA Earthquakes, rain and tides at Portuguese Bend landslide, California. 3F, 5R. BULL. ASSOC. ENGNG. GEOL.VIO, N3, lgi'3,P173-194 • Acceleration in the rate of advance of part of the Portuguese Bend Ismdslide is correlated with earthquakes and rainfall arzl possibly with periods of higher than normal tides. The acceleration seems to be related to the length of time that the base of the landslide is persistently below mean tide. 80 NAT. ACAD. SC I. The great Alaska earthquake of 1964. Volume on engineering. Repc~t. Figs, Tabls,Refs. N~. ACAD. SCI .WASH.DC. USA, 1973, IIgOP. This contains an annotated bibliography and 29 separate reports on aspects of the earthquake. The aspects covered are: 1. Ground motions and soil behaviour; 2. Structural erglneering; and 3. Damage and repairs.
81 USAMI, T UNIV.TOKYO, J SATO, Y UNIV. TOKYO, J TheOretical seismo~smm, introductory expla~tion b~sic concept. 4F, SR.
E A m ~ ~I.~EV.VS, N3,1972,P291-Bol~ 82 ADAMS,WM Engineering Geology Case HistOries 8.-Eight papers on englm~ering seimmology, effects of ground or fluid motion on the works of maru Figs. GEOL. SOC.AM~.BOUL~,COLO. USA, 1970, 70P.
TRY OUR BACK SEARCHING SERVICE:-
Coverage of rock mechanics and allied subjects, such as sol! mechanics and earthquake engineering etc. We have a data bank of over 25,000 references.
Earthquake mechanisms and effects See also abstract: 3.
74 BUFE, CG NAT. OCEAN. ATMOS. ADMIN. SAN FRANCISCO, U&~ Strain and tilt observations near an active fault. Symposlt~a. In Stability of rock slopes. 3F. 13TH SYMPOSIUM ON ROCK MECHANICS ASCE, NEW YORK,
1972,P685-69o.
The instrumentation at the stone canyon observatOry in the San Andreas fault zone is described. From observations made and data obtained it is concluded that: 1. Areal strain charges appear to be tied to temperature and precipitatior~ 2. Factors affecting the production of ground contraction may include rapid cooling of the surface by rain and waterpressure effects; 3. The Orientation of strain change ellipses appears to relate to the local geologic, topographic and tectonic regimes; and 4. A reversal of the secular southerly tilt trend correlated with fault creep and earthquake activity, indicating that this trend is of tectonic origin.
75 IBANEZ, J Notes on the dynamic calculus of buildings and soils. In Spanish. UNIV.S.A. EDITORIAL UNIV.CHILE,~ANTIAGO, 1971,53P. Some concepts on the Origin of earthquakes and the nature of the movement at the surface of the ground are outlined. They emphasize the importance of the first thrust caused by the rupture of the rock, ar~ the free vibration of the sedimentary deposits lying on it, started by that thrust. A mathematical analysis of such vibration is made in order to ascertain the periods and the shearing stresses within the soil. Numerical calculations are included: both fOr s single stratum of soil, confined and not confinml, and fOr a three strata soil. The seismic response of strUctures is presented: both by the modal dynamic method and by the static method recommended by the Chilean Code. An example of numerical calculation is presented.
76 ALITSHULER, LV PAVLOVSKY, MN Investigation of clay and blue shale under strong dyn~mlc influences. In Russian. J.APPLIED MECHANICS AND TECHNICAL PHYSICS, N1,1971, P171-176. Results of an investigation of the dynamic compressibility of a few types of sedimentary rocks are described. The dynamic adiabatic curves of four types of clay and blue shale are obtained for l~essure of up to 500 kbar. The initial sections of isentropic expansion curves were also found. The peculiarities of the shape of the curves connected with a phase conversion are explained. Limitations of the application of the law of additive construction of the adiabatic c~cves from adiabatic curves of components to the investigated complex systems are shown. 77 KOTSUBO, S TAKANI SIll,T An analysis of behaviour of layered media during earthquake by feed-back theory. TRANS. DEI~f.ENGNG. KYUSHU UNIV. FUKUOKA, J. 1973. In calculating the behaviour of layered media due to seismic wave incident from the bed rock, a method of multi-degrees of freedom system or a method of modal analysis has been applied instead of the method of wave propagation theory. In the former method, the dissipation of energy in the upper media into the bed rock cannot be explained and viscous damping is inevitably included in the equation of motion. The fundamental concepts adopted in this paper are to feed back a certain rate
of the acceleration of layered media into the acceleration of bed rock by using modal analysis. According to this theory, it is not necessary to include the viscous damping in the equation of motion and the behavlour of the layered media is reasonably calculated.
78 CROWLEY, BK UNIV. CALIF. LIVERMORE, USA Effects of porosity and saturation on shock wave response in tuffs. 23F,6T, 16R, INT. J. ROCK MECH, MIN. SCI .V10, NS, 1973, P437-464. The attenuation of a stress-wave as it propagates t h r o u ~ tuffaceous rocks of various porosities and degrees of saturation is investigated by a calculatlonal psrameter study. The equations of sta~e for the various porous anl saturated turfs considered are constructed from (I) appr~imations of the loading curves for tnffs at various grain denslties; (2) the weight per cent of water under consideratior~ (3) a loading curve for water, and (4) estimates of loss of gasfilled porosity during loading, These equations are used in one-dimensional cslculations to examine how peak radial stress and peak particle velocity sre ~ffected by porosity and saturation. The investigation was limited to the regions where peak radial stress is below about 40kbar. The results show that the peak stress at a given distance from the working POint decreases over the range from rock at grain density to rock with small amounts of either water or open void sPace, T h e atteramtion of peak particle velocities is somewhat similar to stress attenuation through the rock. However~ the particle velocity is less sensitiMe than stress to cha~ges in void frsetion or saturation of the rock,
79 EASTON, WH UNIV. SOUTHERN CALIF. LOS ANGELEs, USA Earthquakes, rain and tides at Portuguese Bend landslide, California. 3F, 5R. BULL. ASSOC. ENGNG. GEOL.VIO, N3, lgi'3,P173-194 • Acceleration in the rate of advance of part of the Portuguese Bend Ismdslide is correlated with earthquakes and rainfall arzl possibly with periods of higher than normal tides. The acceleration seems to be related to the length of time that the base of the landslide is persistently below mean tide. 80 NAT. ACAD. SC I. The great Alaska earthquake of 1964. Volume on engineering. Repc~t. Figs, Tabls,Refs. N~. ACAD. SCI .WASH.DC. USA, 1973, IIgOP. This contains an annotated bibliography and 29 separate reports on aspects of the earthquake. The aspects covered are: 1. Ground motions and soil behaviour; 2. Structural erglneering; and 3. Damage and repairs.
81 USAMI, T UNIV.TOKYO, J SATO, Y UNIV. TOKYO, J TheOretical seismo~smm, introductory expla~tion b~sic concept. 4F, SR.
E A m ~ ~I.~EV.VS, N3,1972,P291-Bol~ 82 ADAMS,WM Engineering Geology Case HistOries 8.-Eight papers on englm~ering seimmology, effects of ground or fluid motion on the works of maru Figs. GEOL. SOC.AM~.BOUL~,COLO. USA, 1970, 70P.
TRY OUR BACK SEARCHING SERVICE:-
Coverage of rock mechanics and allied subjects, such as sol! mechanics and earthquake engineering etc. We have a data bank of over 25,000 references.