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A new calibration technique to improve data reduction for stokoe resonant column test

A new calibration technique to improve data reduction for stokoe resonant column test
A new calibration technique to improve data reduction for stokoe resonant column test

When testing of stiff soil specimens using a Stokoe resonant column apparatus (RCA) the compliance of the apparatus significantly influences the derived stiffness of the soil [6]. In this paper, we present a simple mathematical model that takes into account equipment compliance, and therefore improving the accuracy in derivation of the small strain shear modulus of soils tested using a Stokoe RCA. The model utilises the simple harmonic motion of two springs in series to derive the equations of motion; one spring represents the equipment torsional stiffness, while the other spring represents the unknown soil stiffness. The apparatus torsional stiffness can be determined experimentally with a series of aluminium calibration bars. A finite element model was developed to validate the ‘two-spring’ model, confirming that the ‘two-spring’ model was able to significantly mitigate equipment compliance when determining specimen stiffness.

Laboratory test, Modelling, Shear modulus, Small strain stiffness
2366-2557
43-48
Springer
Bui, M.T.
413b9018-cda6-4357-bd10-9b6df54dc701
Priest, J.A.
351c5a60-8c47-4050-904b-5a920d376e45
Clayton, C. R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Randolph, M.
Doan, D.
Tang, A.
Bui, M.
Dinh, V.
Bui, M.T.
413b9018-cda6-4357-bd10-9b6df54dc701
Priest, J.A.
351c5a60-8c47-4050-904b-5a920d376e45
Clayton, C. R.I.
8397d691-b35b-4d3f-a6d8-40678f233869
Randolph, M.
Doan, D.
Tang, A.
Bui, M.
Dinh, V.

Bui, M.T., Priest, J.A. and Clayton, C. R.I. (2018) A new calibration technique to improve data reduction for stokoe resonant column test. In, Randolph, M., Doan, D., Tang, A., Bui, M. and Dinh, V. (eds.) Proceedings of the 1st Vietnam Symposium on Advances in Offshore Engineering. VSOE 2018. (Lecture Notes in Civil Engineering, , (doi:10.1007/978-981-13-2306-5_3), 18) Singapore. Springer, pp. 43-48. (doi:10.1007/978-981-13-2306-5_3).

Record type: Book Section

Abstract

When testing of stiff soil specimens using a Stokoe resonant column apparatus (RCA) the compliance of the apparatus significantly influences the derived stiffness of the soil [6]. In this paper, we present a simple mathematical model that takes into account equipment compliance, and therefore improving the accuracy in derivation of the small strain shear modulus of soils tested using a Stokoe RCA. The model utilises the simple harmonic motion of two springs in series to derive the equations of motion; one spring represents the equipment torsional stiffness, while the other spring represents the unknown soil stiffness. The apparatus torsional stiffness can be determined experimentally with a series of aluminium calibration bars. A finite element model was developed to validate the ‘two-spring’ model, confirming that the ‘two-spring’ model was able to significantly mitigate equipment compliance when determining specimen stiffness.

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More information

e-pub ahead of print date: 25 September 2018
Keywords: Laboratory test, Modelling, Shear modulus, Small strain stiffness

Identifiers

Local EPrints ID: 427876
URI: http://eprints.soton.ac.uk/id/eprint/427876
ISSN: 2366-2557
PURE UUID: 3137244c-7588-492a-8ef1-011cb720a758
ORCID for C. R.I. Clayton: ORCID iD orcid.org/0000-0003-0071-8437

Catalogue record

Date deposited: 01 Feb 2019 17:30
Last modified: 30 Jan 2020 01:30

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