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

Citation

Jamali, H and Tolooiyan, A and Dehghani, M and Asakereh, A and Kalantari, B, Long-term dynamic behaviour of Coode Island Silt (CIS) containing different sand content, Applied Ocean Research, 73 pp. 59-69. ISSN 0141-1187 (2018) [Refereed Article]

Copyright Statement

Copyright 2018 Elsevier Ltd.

DOI: doi:10.1016/j.apor.2018.02.002

Abstract

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.

Item Details

Item Type:Refereed Article
Keywords:Coode Island Silt, dynamic behaviour, sand content, soft soil, cyclic triaxial test
Research Division:Engineering
Research Group:Civil Engineering
Research Field:Civil Geotechnical Engineering
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in Engineering
UTAS Author:Tolooiyan, A (Dr Ali Tolooiyan)
ID Code:129435
Year Published:2018
Web of Science® Times Cited:2
Deposited By:Engineering
Deposited On:2018-11-29
Last Modified:2018-12-05
Downloads:0

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