University Of Tasmania

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Long-term dynamic behaviour of Coode Island Silt (CIS) containing different sand content

journal contribution
posted on 2023-05-19, 22:50 authored by Jamali, H, Ali TolooiyanAli Tolooiyan, Dehghani, M, Asakereh, A, Kalantari, B
The foundations of nearshore and offshore structures are always subjected to long-term cyclic loading which is often a one-way, with low amplitude and a large number of cycles. Hence, the long-term dynamic behaviour of shoreline soils and sediments should be understood to avoid excessive deformation and liquefaction. As one of the most problematic soft soils in Melbourne, Coode Island Silt (CIS) at the northern shoreline of Port Phillip Bay contains a considerable but variable amount of sand. This paper explores the dynamic response of CIS containing different sand content subjected to a large number of cycles. To determine the liquefaction potential, and the effect of sand content on the resilient modulus and permanent strain of CIS, a series of long-term cyclic triaxial tests at a sinusoidal loading frequency of 1 Hz is performed. Based on the test results, it is found that CIS with varying sand content up to 30%, does not liquefy under the cyclic stress ratios and frequency applied in this study. Also, a sand content of 10% causes CIS to degrade more under cyclic loading. In the end, an empirical model to predict the permanent strain of CIS with a variable sand content is calibrated.


Publication title

Applied Ocean Research








School of Engineering


Elsevier Sci Ltd

Place of publication

The Boulevard, Langford Lane, Kidlington, Oxford, England, Oxon, Ox5 1Gb

Rights statement

Copyright 2018 Elsevier Ltd.

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  • Restricted

Socio-economic Objectives

Wave energy; Wind energy; Expanding knowledge in engineering