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Author: RC. Horz Publisher: ISBN: Category : Cyclic triaxial tests Languages : en Pages : 15
Book Description
This investigation examines effects of specimen preparation and testing techniques, that is, loading wave form, degree of saturation, and density variations, on the liquefaction behavior of Monterey No. 0 sand under cyclic loading. The test results indicate that specimen preparation greatly affects the cyclic strength. Specimens prepared moist were 38 to 58 percent stronger than specimens of comparable density prepared dry. Also, specimens prepared using a procedure of undercompaction were approximately 10 percent stronger than comparable specimens prepared without using variable compaction. Loading wave form, as well, affected cyclic strength, with sinusoidal wave forms exhibiting strengths 15 percent stronger than triangular-shaped and 30 percent stronger than rectangular-shaped loading wave forms. An increase in density of 20 kg/m3 (1.2 lb/ft3) caused a 22 to 30 percent increase in strength.
Author: RC. Horz Publisher: ISBN: Category : Cyclic triaxial tests Languages : en Pages : 15
Book Description
This investigation examines effects of specimen preparation and testing techniques, that is, loading wave form, degree of saturation, and density variations, on the liquefaction behavior of Monterey No. 0 sand under cyclic loading. The test results indicate that specimen preparation greatly affects the cyclic strength. Specimens prepared moist were 38 to 58 percent stronger than specimens of comparable density prepared dry. Also, specimens prepared using a procedure of undercompaction were approximately 10 percent stronger than comparable specimens prepared without using variable compaction. Loading wave form, as well, affected cyclic strength, with sinusoidal wave forms exhibiting strengths 15 percent stronger than triangular-shaped and 30 percent stronger than rectangular-shaped loading wave forms. An increase in density of 20 kg/m3 (1.2 lb/ft3) caused a 22 to 30 percent increase in strength.
Author: John P. Mulilis Publisher: ISBN: Category : Sand Languages : en Pages : 0
Book Description
The objectives of this investigation were to (a) participate in a cooperative cyclic triaxial testing program with seven other laboratories and (b) determine the effect of various testing techniques and equipment, i.e., specimen preparation and compaction, B value, density, loading wave form, and compaction equipment on the cyclic triaxial strength of a sand. A total of 28 saturated isotropically consolidated-undrained cyclic triaxial tests were conducted on 2.8-in.-diam by 7-in.-high specimens of Monterey No. O sand. Specimens were compacted to 60 percent relative density (98.5 pcf) using three different compaction techniques (i.e. dry rodding, moist rodding, and moist tamping) with some instances of undercompacting the lower layers. Some specimens were compacted to a relative density of about 66 percent while others were tested when the B value reached approximately 0.91. The effect of loading wave shape was evaluated by subjecting specimens to either a rectangular, near triangular, or sinusoidal loading wave form.
Author: Robert T. Donaghe Publisher: ASTM International ISBN: 0803109830 Category : Anisotropy Languages : en Pages : 896
Book Description
"Although the triaxial compression test is presently the most widely used procedure for determining strength and stress-deformation properties of soils, there have been no books published on triaxial testing since the 1962 second edition of the landmark work The Measurement of Soil Properties in the Triaxial Test by Bishop and Henkel. It is apparent there is a need to document advances made in triaxial testing since publication of Bishop and Henkel's book and to examine the current state of the art in a forum devoted solely to triaxial testing. Because of increasing versatility brought about by recent developments in testing techniques and equipment, it is also important that the geotechnical profession be provided with an up-to-date awareness of potential uses for the triaxial test."--Overview.
Author: Suresh Kumar Chaudhary Publisher: ISBN: Category : Materials Languages : en Pages : 198
Book Description
"A major cause of damage to structures and earth embankments during earthquakes or any other such dynamic vibrating loading conditions has been the liquefaction of saturated sands. There have been several investigations to establish a convenient and relatively simple laboratory test procedure and to study the nature of field conditions leading to sand liquefaction. This investigation evaluates the effects of sample size, testing frequency, and the method of sample preparation on the number of cycles to cause initial liquefaction in pulsating triaxial tests using standardized equipment and test procedures. It has been found that sample size does affect test results as larger diameter samples tend to give a lower dynamic strength for sand. Also, higher pore pressures are generated in larger diameter samples for the same number of stress applications. There is an indication that a higher frequency of loading also produces a lower strength, but this is not considered to be conclusive due to very limited data. On the other hand, it is found that the method of sample preparation does not affect the test results if the variables of sample preparation such as relative density, homogenity, grainsize distribution, and the degree of saturation are maintained reasonably constant"--Abstract, leaf ii.
Author: Phung Duc Long Publisher: Springer Nature ISBN: 9811521840 Category : Science Languages : en Pages : 1417
Book Description
This book presents 09 keynote and invited lectures and 177 technical papers from the 4th International Conference on Geotechnics for Sustainable Infrastructure Development, held on 28-29 Nov 2019 in Hanoi, Vietnam. The papers come from 35 countries of the five different continents, and are grouped in six conference themes: 1) Deep Foundations; 2) Tunnelling and Underground Spaces; 3) Ground Improvement; 4) Landslide and Erosion; 5) Geotechnical Modelling and Monitoring; and 6) Coastal Foundation Engineering. The keynote lectures are devoted by Prof. Harry Poulos (Australia), Prof. Adam Bezuijen (Belgium), Prof. Delwyn Fredlund (Canada), Prof. Lidija Zdravkovic (UK), Prof. Masaki Kitazume (Japan), and Prof. Mark Randolph (Australia). Four invited lectures are given by Prof. Charles Ng, ISSMGE President, Prof.Eun Chul Shin, ISSMGE Vice-President for Asia, Prof. Norikazu Shimizu (Japan), and Dr.Kenji Mori (Japan).
Author: Abdulaziz Osman Abdelkadr Publisher: BoD – Books on Demand ISBN: 3737610185 Category : Science Languages : en Pages : 274
Book Description
In this study experimental and numerical investigations have been carried out with the emphasis on studying the behaviour and liquefaction state of typical silty sand sampled from the Mekelle area in Ethiopia under monotonic and cyclic undrained loadings. Experiments have been carried out to measure the pore pressure accumulation, deformation characteristics and related effective stress paths. A numerical model was then used to simulate the behaviour and liquefaction state associated with the changes in the stress-strain-pore pressure levels by means of the finite element method (FEM) using the FE code Tochnog (Tochnog Professional Company 2021).
Author: Michael Jefferies Publisher: CRC Press ISBN: 020330196X Category : Science Languages : en Pages : 625
Book Description
Soil liquefaction is a major concern in areas of the world subject to seismic activity or other repeated vibration loads. This book brings together a large body of information on the topic, and presents it within a unified and simple framework. The result is a book which will provide the practising civil engineer with a very sound understanding of
Author: RC. Horz
Author: John Paul Mulilis
Author: RC. Horz
Author: 
Author: John P. Mulilis
Author: Robert T. Donaghe
Author: Yu-Lin Alice Jen
Author: Suresh Kumar Chaudhary
Author: Phung Duc Long
Author: Abdulaziz Osman Abdelkadr
Author: Michael Jefferies