scholarly journals Correction of Young’s Modulus Calculation in the Flexural Mode of Resonant Column Test

2020 ◽  
Vol 10 (19) ◽  
pp. 6675
Author(s):  
Wei-Chun Lin ◽  
Chi-Chin Tsai
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Rotational Inertia ◽  
Resonant Column ◽  
Inertia Effect ◽  
Column Test ◽  
Flexural Mode ◽  
Resonant Column Test ◽  
Electromagnetic Drive ◽  
Different Diameters

The resonant column test includes torsional and flexural modes that can be used to obtain reduction curves for the shear modulus and Young’s modulus of the soil, respectively. When the resonant column test is performed under flexural mode, Young’s modulus is calculated mainly using the measured resonant frequency following the formula proposed by Cascante et al. However, this formula does not consider the rotational inertia effect of the electromagnetic drive disk of the resonant column apparatus and thus may inaccurately calculate Young’s modulus. In this study, the formula was modified by considering the rotational inertia effect of the electromagnetic drive disk, and its accuracy was verified by using three aluminum calibration rods with different diameters as a dummy specimen for the resonant tests in flexural and torsional modes.

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.

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

Comparison of small-strain shear modulus and Young’s modulus of dry sand measured by resonant column and bender–extender element

2020 ◽  
Vol 57 (11) ◽  
pp. 1745-1753
Author(s):  
Kai Xu ◽  
Xiaoqiang Gu ◽  
Chao Hu ◽  
Lutong Lu
Keyword(s):  
Shear Modulus ◽  
Resonant Frequency ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Small Strain ◽  
Calibration Method ◽  
Resonant Column ◽  
Small Strain Shear Modulus ◽  
Torsional Excitation ◽  
Dry Sand

The small-strain shear modulus and Young’s modulus of dry sand are simultaneously measured by resonant column and bender–extender element tests. Two different methods are adopted to calibrate the resonant column and the results indicate that the conventional calibration method may significantly underestimate the Young’s modulus obtained in flexural excitation, while it only slightly underestimates the shear modulus obtained in torsional excitation. A new calibration method that establishes a calibration curve based on the resonant frequency is used to overcome the error. With this new calibration method, the shear modulus and Young’s modulus from the resonant column agree well with those from the bender–extender element. It convincingly explains the reason why a very small Poisson’s ratio was observed in previous resonant column tests and suggests that the effect of resonant frequency on the calibration results must be considered in flexural excitation.

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