Experimental evaluation of shear strength fluctuations of clayey soils due to multiple cyclic loads

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2022-05-01
Authors
Tiwari, Binod
Iqbal, Muhammad S
Meeks, Tiffany
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© 2022 Australian Geomechanics Society
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Ajmera, Beena
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Civil, Construction and Environmental Engineering
Abstract
Often seismic loading causes instability and/or failure of geotechnical structures such as foundations, slopes, and embankments in the form of settlements, landslides, and liquefaction. Numerous researchers who have worked on cyclic behavior and strength loss of clayey soils after earthquake loading have focused on the strength reductions immediately after a single cyclic event. Little work is found on the changes in the shear strength of clayey soils after multiple cyclic events representing the main shock and aftershocks in an earthquake sequence. To do so, cyclic direct simple shear tests were conducted on kaolinite specimens. The shear strengths of this soil were measured immediately after a sequence of cyclic loads. The results obtained were used to develop cyclic strength curves and evaluate the strength degradation in the clayey soils. The degree of consolidation between cyclic loads was found to impact the cyclic resistance available during the following cyclic load as well as the resulting strength degradation.
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This presentation is published as Ajmera, B., Tiwari, B., Iqbal, M. S., and Meeks, T., (2022) Experimental evaluation of shear strength fluctuations of clayey soils due to multiple cyclic loads. Proceedings of the 20th International Conference on Soil Mechanics and Geotechnical Engineering– Rahman and Jaksa (Eds) © 2022 Australian Geomechanics Society, May 1st to May 5th 2022 in Sydney, Australia., ISBN 978-0-9946261-4-1. Posted with permission.
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