Results 241 to 250 of about 75,328 (300)

Resonant Column Tests on Partially Saturated Sands

Geotechnical Testing Journal, 1991
Abstract 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 ...
X Qian, DH Gray, RD Woods
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Torsional and flexural resonant column testing of grouted sands

Soil Dynamics and Earthquake Engineering, 2020
Abstract Torsional and flexural resonant column tests were conducted on sands grouted with a fine cement and the effects of confining pressure, strain, grout water-to-cement ratio (W/C) and sand grain size and shape were evaluated. Both types of excitation were applied on a single grouted sand specimen without causing specimen failure.
V.G. Basas, I.A. Pantazopoulos, D.K. Atmatzidis   +2 more
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Resonant Column Testing Procedure for Microbial-Induced Carbonate-Precipitated Sands

Geotechnical Testing Journal, 2023
ABSTRACT One of the fundamental inputs to site response analysis is the characterization of the dynamic properties of the soil, namely the shear modulus and material damping ratio. Because of soil’s nonlinear behavior, these properties change with induced shear strains, and modulus reduction and damping (MRD) curves have been proposed to
Kyunguk Na, Ashly Cabas, Brina M. Montoya   +2 more
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Resonant Column Testing: The Inherent Counter EMF Effect

Geotechnical Testing Journal, 2003
Abstract The standard magnet-coil driving system in resonant column devices provides the required cyclic excitation; however, it inherently produces a counter electromotive force that opposes the motion. In this study, the resonant column is modeled as an electro-mechanical system to quantitatively examine the counter electromotive ...
Wang, Yu-hsing, Cascante, G., Santamarina, J. C.   +2 more
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Shear Moduli of Metal Specimens Using Resonant Column Tests

Journal of Testing and Evaluation, 2019
Abstract The shear moduli of cylindrical metal specimens were determined by performing resonant column tests in a torsional mode of vibration. The tests were performed on four different metals, namely (i) aluminum, (ii) brass, (iii) copper, and (iv) mild steel.
Jyant Kumar, Ninad Sanjeev Shinde
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Applications of the New Approach to Resonant Column Testing

Geotechnical Testing Journal, 2015
Abstract For more than 50 years, the resonant column test has been used to measure the shear modulus and damping of soils for shear strains ranging from 10−5 % to 0.5 %. For most soils, the test is non-destructive, and tests may be performed on the same specimen at multiple confining stresses simulating in situ conditions from near ...
Drnevich, Vincent P., Werden, Salim, Ashlock, Jeramy, Hall Jr., John R.   +3 more
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Resonant Column Tests and Nonlinear Elasticity in Simulated Rocks

Rock Mechanics and Rock Engineering, 2017
Rocks are generally regarded as linearly elastic even though the manifestations of nonlinearity are prominent. The variations of elastic constants with varying strain levels and stress conditions, disagreement between static and dynamic moduli, etc., are some of the examples of nonlinear elasticity in rocks.
Resmi Sebastian, T. G. Sitharam
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Characterization of Warm Mix Asphalt through Resonant Column Testing

Journal of Materials in Civil Engineering, 2015
As the usage of warm mix asphalt (WMA) has gained popularity in recent years, the need has arisen for more characterization techniques and performance prediction through accelerated laboratory testing. This paper presents an experimental study on the shear modulus and damping ratio of asphalt specimens prepared using three WMA technologies: Evotherm ...
Pezhouhan Tavassoti Kheiry, Tong Qiu, Mansour Solaimanian   +2 more
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Evaluation of Effective Soil Density in Resonant Column Tests

IACGE 2013, 2013
This paper presents a theoretical study of effective soil density for small-strain shear wave propagation in saturated soil specimens in resonant column tests. Effective soil density is a term used to consider the fraction of pore water that moves with the solid skeleton during shear wave propagation.
Yanbo Huang, Tong Qiu
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Resonant column technique for dynamic testing of cohesive soils

Canadian Geotechnical Journal, 1981
A resonant column apparatus was modified to facilitate dynamic testing of cohesive soils. To alleviate the difficulties caused by air penetration into the confining medium and the sample, a small telescopic plexiglass cell is placed in the main large cell.
M. Novak, T. C. Kim
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