Download or read book Cyclic Stress strain and Liquefaction Characteristicsof Sands written by Adolfo Alarcon-Guzman and published by . This book was released on 1986 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquefaction of saturated sand and silty sand deposits has been recognized as a major cause of damage during earthquakes. However, in spite of many research studies during the past two decades, there are still conflicting opinions on critical aspects of the phenomenon of soil liquefaction, including the definition of the term "liquefaction." For these reasons, a research program on the behavior of cohesionless soils under cyclic loading was initiated at Purdue University. An important effort was devoted to delineate and understand the physical factors controlling the response of cohesionless soils to cyclic loading and consequently, the factors involved in the different phenomena which have been described with the term "liquefaction" such as steady-state flow, a condition of zero effective stress, or cumulative residual strains due to cyclic loading. A new hybrid resonant column/torsional shear apparatus was designed and built as a part of this research program. The new apparatus permits the determination of dynamic soil properties on a single solid or hollow cylinder specimen over the entire range of shear strain amplitudes of engineering interest, i.e. from 10('-4)% to 10%. Torsional shear tests were performed with the new apparatus on reconstituted specimens of Ottawa 20-30 sand. Among other things, it was found that: (a) the maximum shear modulus, G(, max), is relatively insensitive to important factors affecting the undrained behavior of sands such as stress ratio (and hence fabric), stress history, and cyclic prestraining. Consequently, a direct correlation between G(, max) and liquefaction potential is not possible; (b) if staged testing includes the determination of shear moduli by means of resonant column tests, which imply the application of a considerable number of cycles, it can lead to significant overestimations of shear modulus for sands with no prior cyclic strain history even at shear strain amplitudes as low as 1.1 x 10('-2)%; and (c) at a given rela.
Download or read book Influence of Sample Disturbance on Sand Response to Cyclic Loading written by Kenji Mori and published by . This book was released on 1977 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of Seismic History on the Liquefaction Characteristics of Sands written by Harry Bolton Seed and published by . This book was released on 1975 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geotechnical Earthquake Engineering written by Ikuo Towhata and published by Springer Science & Business Media. This book was released on 2008-12-19 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fascinating new book examines the issues of earthquake geotechnical engineering in a comprehensive way. It summarizes the present knowledge on earthquake hazards and their causative mechanisms as well as a number of other relevant topics. Information obtained from earthquake damage investigation (such as ground motion, landslides, earth pressure, fault action, or liquefaction) as well as data from laboratory tests and field investigation is supplied, together with exercises/questions.
Download or read book Undisturbed Sampling and Cyclic Load Testing of Sands written by Sukhmander Singh and published by . This book was released on 1979 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Undisturbed Sampling of Sands; The Sampling Disturbance in Sands: Its Evaluation and Influence on Strength Properties; Experimental Investigation of the Effect of Tube-Sampling on Cyclic Strength Characteristics of Sands; Experimental Investigation of the Effect of Block Sampling on the Cyclic Strength Characteristics of Sands; Undisturbed Sampling of Sands by Freezing and Coring; Influence of the Disturbances caused by Sample Transportation and Sample Handling in the Laboratory on Cyclic Strength Characteristics of Sands; and Conclusions.
Download or read book Cyclic behaviour and liquefaction potential of silty sand Experimental and numerical investigations written by Abdulaziz Osman Abdelkadr and published by BoD – Books on Demand. This book was released on 2023-01-01 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Deformation Characteristics of Sand Subjected to Anisotropic Cyclic Dynamic Loading written by David Harold Timmerman and published by . This book was released on 1969 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquefaction Characteristics of Sand Reinforced with Small Percentages of Polypropylene Fiber written by Sudhir Kumar Tripathi and published by . This book was released on 2018 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquefaction of soil is one of the major contributing factors for damages of infrastructures and utility services during earthquake. Liquefaction occurs when short strong shaking creates undrained loading condition in saturated soil deposit thereby increases pore water pressure, which eventually equals the effective confining pressure resulting in significant reduction in shear strength and bearing capacity of soil deposit. Several studies have been conducted to investigate the effect of polypropylene fiber on sand deposit as a measure to prevent liquefaction but most of them are based on static tests. Therefore, the present study, tries to understand liquefaction characteristics of sand reinforced with polypropylene fiber based on cyclic triaxial test. The main objectives of this study are (i) to explore the effect of polypropylene fiber on pore pressure generation and deformation characteristics of sand, and (ii) to observe the effect of confining pressure on liquefaction characteristics of sand-fiber mixture. A series of stress controlled cyclic triaxial tests were performed at 5 and 10 psi effective confining pressures. At 5 psi effective confining pressure, specimens of clean sand, and sand containing 0.05, 0.075, 0.1, and 0.3% polypropylene fiber by dry weight were tested at 0.2, 0.25, 0.3, and 0.4 Cyclic Stress Ratio (CSR). However, at 10 psi effective confining pressure, specimens were also tested for 0.5%, and 0.75% fiber in addition to those at 5 psi confining pressure at 0.2, 0.3, and 0.4 CSR. Based on the test results, it was observed that, cyclic shear stress increases with the increase in initial effective confining pressure. Also, for a given CSR, liquefaction resistance decreased with the increase in effective confining pressure. Furthermore, significant improvement in liquefaction resistance was observed when the fiber content exceeded beyond 0.075% at 5 psi confining stress. However, at 10 psi confining pressure, addition of fiber did not help in improvement of liquefaction resistance of sand except when cyclic shear stress was applied at 0.2 CSR. At 0.2 CSR, although the specimens did liquefy based on pore pressure generation criteria at all fiber contents, specimens containing 0.5% and 0.75% fiber did not ever reach 2.5% and 5% DA (Double Amplitude) deformation throughout 1000 loading cycles.
Download or read book Liquefaction Characteristics of Sandy Soil with Fines Under Cyclic Loading written by John L. M. Vrymoed and published by . This book was released on 1973 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Method of Sample Preparation on the Cyclic Stress strain Behavior of Sands written by John Paul Mulilis and published by . This book was released on 1975 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cyclic Stress Conditions Causing Liquefaction of Sand written by Kenneth Lester Lee and published by . This book was released on 1967 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Liquefaction Triggering and Post liquefaction Deformation of Monterey 0 30 Sand Under UNI directional Cyclic Simple Shear Loading written by Jiaer Wu and published by . This book was released on 2002 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Earthquake Geotechnical Engineering written by Kenji Ishihara and published by CRC Press. This book was released on 1995-01-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work is based on an international conference held in Tokyo in 1995. Topics covered include: dynamic behaviour of soil; dynamic response of ground; liquefaction and associated phenomenon; seismic failure of embankments and slopes; and reports on recent earthquakes.
Download or read book Soil Liquefaction written by Michael Jefferies and published by CRC Press. This book was released on 2006-09-04 with total page 625 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Download or read book Liquefaction of Saturated Sands During Cyclic Loading written by Harry Bolton Seed and published by . This book was released on 1966 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Liquefaction Potential of Sand by Cyclic Triaxial and Torsional Loadings written by Yu-Lin Alice Jen and published by . This book was released on 1983 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deformation Characteristics of Geomaterials Comportement Des Sols Et Des Roches Tendres written by H. Di Benedetto and published by CRC Press. This book was released on 2003-01-01 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main themes of this conference are experimental investigations into deformation properties - from very small strains to beyond failure, laboratory, in-situ and field observation interpretations, and behaviour characterization and modelling. Emphasis is placed on exploring recent investigations into time-related stresses, and on applying advanced geotechnical testing to real engineering problems.
