Abstract: Cyclic loading in marine clay may lead to gradual loss of its shear strength and it is a major cause for increasing pore water pressure. This paper presents the strain-controlled cyclic direct simple shear test results to describe the cyclic undrained shear strength of Malaysia marine clay under different over consolidation ratios (OCR) and strain amplitudes ranging from ±1% to ±5%. It is reported herein that the degradation of shear strength and pore water pressure increment are significant when cyclic strain amplitude applied on clay specimen increases. On the other hand, over consolidated clay specimens tend to develop negative pore pressure at low strain level (±1%) as soon as cyclic tests began. However, normally consolidated clay specimens generate positive pore pressure at all strain amplitudes applied in the present study.
Keywords: Clay, strain-controlled, strain amplitudes, pore pressure, simple shear, over consolidation ratio.
Title: Effect of OCR on Cyclic Shear Strength Degradation of Marine Clay
Author: Thian, S.Y., Lee, C.Y.
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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