Preloading Effects on Dynamic Sand Behavior by Resonant Column Tests PDF Download

Author: Lidong Bai
Publisher:
ISBN: 9783844001204
Category :
Languages : en
Pages : 190

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Book Description

Author: Lanmin Wang
Publisher: Springer Nature
ISBN: 3031118987
Category : Science
Languages : en
Pages : 2417

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Book Description
The 4th International Conference on Performance-based Design in Earthquake Geotechnical Engineering (PBD-IV) is held in Beijing, China. The PBD-IV Conference is organized under the auspices of the International Society of Soil Mechanics and Geotechnical Engineering - Technical Committee TC203 on Earthquake Geotechnical Engineering and Associated Problems (ISSMGE-TC203). The PBD-I, PBD-II, and PBD-III events in Japan (2009), Italy (2012), and Canada (2017) respectively, were highly successful events for the international earthquake geotechnical engineering community. The PBD events have been excellent companions to the International Conference on Earthquake Geotechnical Engineering (ICEGE) series that TC203 has held in Japan (1995), Portugal (1999), USA (2004), Greece (2007), Chile (2011), New Zealand (2015), and Italy (2019). The goal of PBD-IV is to provide an open forum for delegates to interact with their international colleagues and advance performance-based design research and practices for earthquake geotechnical engineering.

Author: T. G. Sitharam
Publisher: Springer Nature
ISBN: 9813340010
Category : Science
Languages : en
Pages : 421

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Book Description
This volume presents select papers presented at the 7th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. The papers discuss advances in the fields of soil dynamics and geotechnical earthquake engineering. A strong emphasis is placed on connecting academic research and field practice, with many examples, case studies, best practices, and discussions on performance based design. This volume will be of interest to researchers and practicing engineers alike.

Author: Madhavi Latha G.
Publisher: Springer
ISBN: 9811358710
Category : Science
Languages : en
Pages : 453

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Book Description
This volume contains contributions by eminent researchers in the field of geotechnical engineering. The chapters of this book are based on the keynote and theme lectures delivered at the Indian Geotechnical Conference 2018, and discuss the recent issues and challenges, while providing perspective on the possible solutions and future directions. A strong emphasis is placed on proving connections between academic research and field practice, with many examples and case studies. Topics covered in this volume include contemporary infrastructural challenges, underground space utilization, sustainable construction, dealing with problematic soils and situations and geo-environmental issues including landfills. This book will be of interest to researchers, practitioners and students alike.

Author: Hernán Patiño
Publisher:
ISBN:
Category : Sand
Languages : en
Pages : 19

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Author: Boonam Shin
Publisher:
ISBN:
Category :
Languages : en
Pages : 188

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Book Description
This study was motivated by the fact that many times intact specimens with a number of oversized particles are dynamically tested in the laboratory and the impact of the particles on the dynamic properties is unknown. The effects of oversized particles represented by gravel particles on the shear modulus (G) and material damping ratio (D) of a uniform sand were evaluated in the linear ([gamma] ≤ 0.001%) and nonlinear ([gamma] > 0.001%) ranges of shear strain with combined resonant column and torsional shear (RCTS) equipment. The sand used in this investigation is a uniform sand as a reference, well-characterized material on the dynamic properties. Sand-gravel specimens were constructed using the undercompaction method. A variety of rounded gravel particles was used in building the specimens. Dynamic tests on the sand-gravel specimens were performed, and the tests results are presented. Among the findings of this investigation are that, compared to uniform sand: (1) oversized gravel particles symmetrically located along the longitudinal axis in uniform sand generally decreased slightly the small-strain shear modulus (Gm̳a̳x̳), (2) oversized gravel particles asymmetrically located away from the longitudinal axis of rotation resulted in slight increases in Gm̳a̳x̳ and the small-strain material damping ratio (Dm̳i̳n̳), (3) the G - log [gamma] relationships of sand-gravel specimens with asymmetrically located gravel particles are generally above those with gravel particles symmetrically located along the longitudinal axis, and (4) the G/Gm̳a̳x̳ - log [gamma] relationships of all specimens were reasonably close for the nonlinear ranges covered in these tests ([gamma] 0.05 % and G/Gm̳a̳x̳ 0.6). As long as the oversized particles were near the axis of rotation, the particles had little effect on the dynamic properties (Gm̳a̳x̳, Dm̳i̳n̳ and G - log [gamma] relationships) regardless of sizes and numbers of particles. However, once the oversized particles were located away from the axis of rotation and closer to the perimeter of the specimen, the oversized particles influenced the dynamic properties. Finally, the additions of oversized particles located both symmetrically and asymmetrically in the uniform sand specimens have little impact on the nonlinear dynamic properties (G/Gm̳a̳x̳ - log [gamma] and D - log [gamma] relationships) which compared well with uniform sand.

Author: Sheng-Huoo Ni
Publisher:
ISBN:
Category : Axial loads
Languages : en
Pages : 476

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Book Description

Author: RM. Chung
Publisher:
ISBN:
Category : Damping
Languages : en
Pages : 10

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Book Description
Torsional resonant column tests were performed on Monterey No. 0 sand of 60% relative density under confining pressures ranging from 10 to 300 kPa to evaluate the dynamic properties of the sand. Both solid and hollow cylindrical specimens were used in testing, and shear moduli and damping ratios were determined for cyclic shear strain amplitudes from 10-4 to 5 × 10-2%. The test results indicated that the type of specimen, that is, solid or hollow cylinder, had no significant effect on the calculated shear moduli and damping ratios, except that at very low strain amplitudes (?

Author: Patrick M. Griffin
Publisher:
ISBN:
Category : Sand
Languages : en
Pages : 368

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Book Description
An experimental research program based on laboratory test studies and scaled slope model tests was conducted with specimens of Monterey No. 0 sand. The principal objective of the research was to study the effects of interactive coupling during combined compression (normal) and shear loading on the response of sands to dynamic loading. The research program included the following experimental studies: (1) Resonant Column tests on cylindrically shaped specimens using longitudinal and torsional excitation, both separately and in combination. (2) Thin-walled Hollow Cylinder tests using longitudinal and torsional cyclic excitation, both separately and in combination. (3) Large scale shaking table tests on slope models, using horizontal and vertical cyclic excitation, both separately and in combination. (Author).

Author: X. Qian
Publisher:
ISBN:
Category : Capillary phenomena
Languages : en
Pages : 10

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Book Description
This paper describes the measurement of the influence of capillary effects on the dynamic shear modulus of partially saturated sands. A Hall-type resonant column apparatus was used to perform the experiments. The materials tested included natural angular and subrounded sands, angular and subrounded sands with specified artificial gradations, and uniform angular and subrounded sands with various minus No. 400 sieve size fractions.