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Measurements of nonlinearity parameter B/A of water-saturated glass beads under uniaxial compressive loading
Hunki Lee1, Eunghwy Noh1, Won-Suk Ohm1
1School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Koreassevi2@yonsei.ac.kr, hwyya@yonsei.ac.kr, ohm@yonsei.ac.kr.
Abstract:
This Letter reports measurements of nonlinearity parameter B/A of water-saturated glass beads under uniaxial compression representative of the gravitational loading in seabed. The finite-amplitude method in conjunction with the multi-Gaussian beam model is used to determine B/A, in which the use of an accurate source function is found to be important in achieving the overall measurement accuracy. The estimated B/A is on the order of a hundred and decreases with increasing uniaxial compression up to 50 kPa, so that B/A could change as much as 20% over a depth of 5 m for a typical coarse sandy sediment.
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