Effect of the Number of Loading Cycles on the Behavior of a Stabilized Fiber-Reinforced Soft Soil: Energy Evaluation

Martins, Ligia A.; Correia, Antonio A. S.; Venda Oliveira, Paulo J.; Lemos, Luís J. L.

doi:10.1061/jmcee7.mteng-15231

J. Mater. Civ. Eng.

2023

DOI: 10.1061/jmcee7.mteng-15231

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Effect of the Number of Loading Cycles on the Behavior of a Stabilized Fiber-Reinforced Soft Soil: Energy Evaluation

Ligia A. Martins,

Antonio A. S. Correia,

Paulo J. Venda Oliveira

et al.

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2024

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Cited by 3 publications

References 66 publications

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Study on the Yield Surface of a Fibre-Reinforced Stabilised Soil – Effect of the Number of Loading Cycles

Martins,

Correia,

Venda Oliveira

et al. 2024

Int. J. of Geosynth. and Ground Eng.

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Cyclic loading may induce changes in the geomechanical behaviour of materials that should be characterised. This work studies the impact of the number of loading cycles on the mechanical behaviour of a fibre-reinforced stabilised soil focusing on its behaviour before failure (yield surface). To this end, an experimental testing program based on triaxial tests was performed on samples not subjected to a cycling loading stage, as well as on samples previously subjected to a cycling loading stage varying the number of loading cycles from 1,000 to 100,000. The results were studied in terms of the accumulated permanent axial strain and the yield surface of the composite material. It was observed that increasing the number of loading cycles led to a rise in the accumulated permanent axial strain and in the undrained resilient modulus. The results also showed an expansion of the yield surface during the first 1,000 loading cycles (the yield occurs later due to the partial mobilization of the tensile strength of the fibres during the cyclic stage) but its shape is maintained. The results also showed a progressive reduction in the yield loci with the increase in the number of loading cycles, reflecting the greater degradation of the solid matrix induced by the accumulated permanent axial strains.

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Study on the Yield Surface of a Fibre-Reinforced Stabilised Soil – Effect of the Number of Loading Cycles

Martins,

Correia,

Venda Oliveira

et al. 2024

Int. J. of Geosynth. and Ground Eng.

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Using the shakedown theory to study the cyclic behaviour of an unreinforced and fibre-reinforced stabilized soft soil

Martins,

Correia,

Venda Oliveira

et al. 2024

International Journal of Geotechnical Engineering

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Effect of the cyclic loading on the yield surface of a chemically stabilised soil

Martins,

Correia,

Venda Oliveira

et al. 2024

Proceedings of the Institution of Civil Engineers - Ground Impr

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When a soil is subjected to cyclic loading, there are changes in the material's geomechanical behaviour that need to be characterized before safely designing any future projects. In terms of cyclic loading, it is important to characterise not only the failure of the soil but also its behaviour before failure, in particular the yield point and the elastic behaviour of the material. This study examines the effects of the number of loading cycles on the behaviour of a chemically stabilised soft soil with a particular focus on the yield surface. To this end, a series of triaxial tests were performed on specimens, previously or not subjected to a different number of loading cycles (1,000–100,000). The results were analysed in terms of the evolution of accumulated permanent axial strain, the yield surface and stress-strain behaviour. It was observed that an increase in the number of loading cycles promoted: an increase in the permanent axial strain, an increase in the undrained resilient modulus, a shrinkage of the yield surface but its shape is maintained, and there is a small increase in the peak strength of the stabilised soil explained by the strain hardening effect induced by the cyclic loading.

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Effect of the Number of Loading Cycles on the Behavior of a Stabilized Fiber-Reinforced Soft Soil: Energy Evaluation

Cited by 3 publications

References 66 publications

Study on the Yield Surface of a Fibre-Reinforced Stabilised Soil – Effect of the Number of Loading Cycles

Study on the Yield Surface of a Fibre-Reinforced Stabilised Soil – Effect of the Number of Loading Cycles

Using the shakedown theory to study the cyclic behaviour of an unreinforced and fibre-reinforced stabilized soft soil

Effect of the cyclic loading on the yield surface of a chemically stabilised soil

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