Results 251 to 260 of about 7,206,975 (296)

Evaluation of Dynamic Properties of Sands by Resonant Column Testing

Geotechnical Testing Journal, 1984
Abstract 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 ...
RM Chung, FY Yokel, VP Drnevich
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Resonant column testing of frozen soils

1980
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Application of Random Vibration Techniques to Resonant Column Testing

GeoFlorida 2010, 2010
A 152.4 mm (6 in) diameter resonant column device was modified to enable the direct measurement of torsional acceleration transfer functions of samples subjected to random excitation in the small-strain regime. Samples were tested over a wide range of confining pressures. By measuring the rotational acceleration of the end platens, the need to estimate
Jeramy C. Ashlock, Ronald Y. S. Pak
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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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Resonant-Column Testing—Problems and Solutions

1978
The resonant-column test is a relatively nondestructive test employing wave propagation in cylindrical specimens of soil and rock. Test results are usually quite accurate, but in some cases insufficient coupling exists between specimen and apparatus or specimens are too stiff for a given apparatus, or both.
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An Automatic Feedback System for Resonant Column Testing

Geotechnical Testing Journal, 1990
Abstract A test method and electronic circuitry is described that greatly simplifies measurement of resonant frequency in the resonant column test. It utilizes a feedback system to detect resonance automatically without requiring manual adjustment and also eliminates the need for a sine wave audio oscillator or oscilloscope.
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Effect of Slenderness Ratio of the Specimen on Resonant Column Test Results

Journal of Testing and Evaluation, 2020
Abstract To investigate the effect of the slenderness ratio (L/d) of the specimen, resonant column (RC) tests were conducted on dry sand specimens by using three different values of L/d, namely 2, 3, and 4, keeping the same diameter (d = 50 mm) to measure the shear moduli and material damping associated with the shear strain varying ...
Ninad Sanjeev Shinde, Jyant Kumar
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Effect of Specimen Coupling on the Torsional Resonant Column Test

Geotechnical Testing Journal, 2013
Abstract The torsional resonant column is used to measure dynamic properties of soils. For this purpose, a sinusoidal torque is applied on a cylindrical specimen. The response of the specimen is used to derive the shear modulus and damping ratio of the specimen as functions of the induced shearing strain amplitude.
M. Picornell, S. Nazarian, A. Y. Almadhoun   +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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