Effect of sample torsional stiffness on resonant column test results

2007 ◽  
Vol 44 (2) ◽  
pp. 221-230 ◽  
Author(s):  
Jyant Kumar ◽  
C RI Clayton
Keyword(s):  
Resonant Frequency ◽  
Dynamic Properties ◽  
Diameter Ratio ◽  
Torsional Stiffness ◽  
Driving Mechanism ◽  
Resonant Column ◽  
Column Test ◽  
Column Tests ◽  
Resonant Column Test ◽  
Length To Diameter Ratio

A number of resonant column tests were conducted in torsion on aluminium cylindrical bars. By changing the length to diameter ratio of these specimens, the resonant frequency was varied between 52 and 332 Hz. The values of the shear wave velocity (VS) and damping ratio (D) determined from these tests were found to remain acceptable up to a resonant frequency of about 175 Hz. Thereafter, with an increase in the torsional stiffness of the specimen, there was a significant decrease in VS of up to 32.2%, corresponding to a resonant frequency of 332 Hz, and a considerable increase in the damping was noticed. An apparent increase in the mass polar moment of inertia of the driving mechanism was also observed at a greater resonant frequency. The study reveals that, even for a stiff specimen, it is possible using the resonant column tests to accurately determine the dynamic properties of the specimen, provided that the length to diameter ratio of the specimen is increased so that the resonant frequency remains smaller than 175 Hz.Key words: damping, dynamic testing, resonant column test, resonant frequency, shear modulus.

scholarly journals Evaluation of Dynamic Properties of Sodium-Alginate-Reinforced Soil Using A Resonant-Column Test

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2743
Author(s):  
Seongnoh Ahn ◽  
Jae-Eun Ryou ◽  
Kwangkuk Ahn ◽  
Changho Lee ◽  
Jun-Dae Lee ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Sodium Alginate ◽  
Shear Failure ◽  
Dynamic Properties ◽  
Damping Ratio ◽  
Reinforced Soil ◽  
Resonant Column ◽  
Column Test ◽  
Alginate Solution ◽  
Resonant Column Test

Ground reinforcement is a method used to reduce the damage caused by earthquakes. Usually, cement-based reinforcement methods are used because they are inexpensive and show excellent performance. Recently, however, reinforcement methods using eco-friendly materials have been proposed due to environmental issues. In this study, the cement reinforcement method and the biopolymer reinforcement method using sodium alginate were compared. The dynamic properties of the reinforced ground, including shear modulus and damping ratio, were measured through a resonant-column test. Also, the viscosity of sodium alginate solution, which is a non-Newtonian fluid, was also explored and found to increase with concentration. The maximum shear modulus and minimum damping ratio increased, and the linear range of the shear modulus curve decreased, when cement and sodium alginate solution were mixed. Addition of biopolymer showed similar reinforcing effect in a lesser amount of additive compared to the cement-reinforced ground, but the effect decreased above a certain viscosity because the biopolymer solution was not homogeneously distributed. This was examined through a shear-failure-mode test.

scholarly journals Evaluation of Dynamic Properties of Trackbed Foundation Soil Using Mid-size Resonant Column Test

2013 ◽  
Vol 6 (3) ◽  
pp. 112-119
Author(s):  
Yujin Lim ◽  
Tien Hue Nguyen ◽  
Seong Hyeok Lee ◽  
Jin-Wook Lee
Keyword(s):  
Dynamic Properties ◽  
Resonant Column ◽  
Column Test ◽  
Foundation Soil ◽  
Resonant Column Test

Elastic Stiffness of Volcanic Sand through Resonant Column Tests

2015 ◽  
Vol 775 ◽  
pp. 292-297
Author(s):  
Kostas Senetakis ◽  
Anastasios Anastasiadis
Keyword(s):  
Dynamic Properties ◽  
Experimental Testing ◽  
Elastic Stiffness ◽  
Laboratory Method ◽  
Granular Soils ◽  
Resonant Column ◽  
Torsional Mode ◽  
Resonant Column Test ◽  
Basic Features ◽  
Low Amplitude

The resonant column method is established as a standard laboratory method for the study of the elastic properties of soils. The study presents low-amplitude resonant column test results on volcanic sands with intra-particle voids. The experiments were performed on dry samples prepared at variable relative densities and tested in torsional mode of vibration. In the first part of the article, the important factors that control the elastic stiffness of uncemented sands are described shortly and recent findings on granular soils dynamic properties are presented briefly. The second part describes the basic features of the resonant column used in the investigation and the materials of the study and in the third part representative results of an extensive experimental testing program on volcanic granular soils are presented and discussed with a focus on comparisons between the elastic stiffness of volcanic and quartz granular soils. The importance of the effect of the presence of intra-particle voids within the particle mass of the volcanic soils is emphasized, which in turn affects markedly the global void ratio of the samples.

Evaluation of Resonant Column Test Devices

1976 ◽  
Vol 102 (11) ◽  
pp. 1147-1158
Author(s):  
George R. Skoglund ◽  
Robert W. Cunny ◽  
William F. Marcuson
Keyword(s):  
Resonant Column ◽  
Column Test ◽  
Resonant Column Test

scholarly journals Identification on rock and soil parameters for vibro-cutting rock by disc cutter based on fuzzy radial basis function neural network

2018 ◽  
Vol 175 ◽  
pp. 03073
Author(s):  
Qiang Chen ◽  
Jianke Lang
Keyword(s):  
Neural Network ◽  
Radial Basis Function ◽  
Basis Function ◽  
Disc Cutter ◽  
Resonant Column ◽  
Column Test ◽  
Soil Parameter ◽  
Resonant Column Test ◽  
Radial Basis ◽  
Rock And Soil

A single-POF model of disc cutter with rock and soil has been established according to the dynamical feature and vibration mechanism of disc cutter vibro-cutting rock to solve problem of self-adaption vibro-cutting rock for disc cutter, and identification on rock and soil parameter of disc cutter vibro-cutting rock has been carried out by using fuzzy radial basis function neural network. The experimental result of identification simulation and resonant-column test showed that compared to inherent frequency of a hard sandy which was tested by resonant-column test method, the relevant error of rock and soil parameter identification value of disc cutter vibro-cutting rock is 0.87 %, with high estimation accuracy.

Effect of Specimen Coupling on the Torsional Resonant Column Test

2013 ◽  
Vol 36 (4) ◽  
pp. 20120104 ◽  
Author(s):  
M. Picornell ◽  
S. Nazarian ◽  
A. Y. Almadhoun
Keyword(s):  
Resonant Column ◽  
Column Test ◽  
Resonant Column Test

Resonant Column Test for Unsaturated Soils With Suction–Saturation Control

2011 ◽  
Vol 34 (6) ◽  
pp. 103102 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
Ali Khosravi ◽  
John S. McCartney
Keyword(s):  
Unsaturated Soils ◽  
Resonant Column ◽  
Column Test ◽  
Saturation Control ◽  
Resonant Column Test
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