Static liquefaction of fibre reinforced sand under monotonic loading

Ibraim, Erdin; Diambra, Andrea; Wood, D. Muir; Russell, Adrian R.

doi:10.1016/j.geotexmem.2009.12.001

Cited by 112 publications

(69 citation statements)

References 54 publications

(62 reference statements)

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“…This is indeed supported by the observations by Diambra et al (2010) and Ibraim et al (2010). At this special shear mode,ũ 5 180°[ Fig.…”

Section: Prediction Of the True Triaxial Failure Strength For Fiber-rsupporting

confidence: 85%

“…This was first revealed by direct shear tests in which the measured strength of a fiber-reinforced soil was found to be dependent on the fiber orientation in the composite (Gray and Ohashi 1983;Jewell and Wroth 1987;Palmeira and Milligan 1989). More recent studies using triaxial compression and extension tests with varying fiber orientations have repeatedly supported the aforementioned observations (Li 2005;Diambra et al 2010;Ibraim et al 2010). For instance, Diambra et al (2010) have shown that the contribution of fibers to soil strength is remarkable in triaxial compression but limited in triaxial extension, and have indicated that it is attributable to the preferred orientation of fibers in the tested samples (Diambra et al 2007).…”

Section: Introductionmentioning

confidence: 72%

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Evaluation on Failure of Fiber-Reinforced Sand

Gao

Zhao

2013

J. Geotech. Geoenviron. Eng.

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Fiber reinforcement can help to enhance soil strength, stabilize near-surface soil layers, and mitigate the risk of soil liquefaction. Evaluation of the strength of fiber-reinforced soils needs a proper failure criterion. This study presents a three-dimensional failure criterion for fiber-reinforced sand. By assuming that the total strength of the composite is a combination of the shear resistance of the host soil and the reinforcement of fibers, a general anisotropic failure criterion is proposed with special emphasis on the effect of isotropically/anisotropically distributed fibers. An anisotropic variable, defined by the joint invariant of the deviatoric stress tensor and a deviatoric fiber distribution tensor, is introduced in the criterion to quantify the fiber orientation with respect to the strain rate/stress direction at failure. With further consideration of the fiber concentration and other factors such as aspect ratio, the proposed criterion is applied to predicting the failure of fiber-reinforced sand in conventional triaxial compression/extension tests for both isotropically and anisotropically distributed fiber cases. The predictions are in good agreement with the test results available in the literature. The practical significance of using this criterion for such problems as inclined slope stabilization is briefly discussed.

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“…This is indeed supported by the observations by Diambra et al (2010) and Ibraim et al (2010). At this special shear mode,ũ 5 180°[ Fig.…”

Section: Prediction Of the True Triaxial Failure Strength For Fiber-rsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 72%

Evaluation on Failure of Fiber-Reinforced Sand

Gao

Zhao

2013

J. Geotech. Geoenviron. Eng.

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“…1(b), where Vf is the volume ofˆbres. However, based on recent experimentalˆndings by Diambra (2010) and Ibraim et al (2010), it is suggested that the volume of voids should be divided into two parts`attached' respectively to the sand matrix (Vvs) and to thê bres (Vvf), Fig. 1(c).…”

Section: Rule Of Mixturesmentioning

confidence: 99%

“…This model has been further extended here to simulate the undrained features of the behaviour ofˆbre reinforced sands. As suggested in , a more advanced model for the sand matrix has been considered and the apparent densiˆcation eŠect induced by the presence of theˆbres has been accounted for, based on the experimental data by Ibraim et al (2010).…”

Section: Introductionmentioning

confidence: 99%

Modelling the Undrained Response of Fibre Reinforced Sands

Diambra

Ibraim

Russell³

et al. 2011

Soils and Foundations

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Mixing a loose clean sand with random discrete ‰exibleˆbres has been found beneˆcial in decreasing the susceptibility to the phenomenon of liquefaction under monotonic loading. The addition ofˆbres can convert the strain softening response, typical of a loose unreinforced sand, into a strain hardening response by aŠecting the pore pressure generation and the eŠective stress path response. A new constitutive model based on the rule of mixtures has been used to simulate the undrained response ofˆbre reinforced sands. The model superimposes the individual contributions of the sand and theˆbres according to their volumetric fraction. An apparent densiˆcation of the sand matrix induced by the presence of theˆbres is accounted for in the model by assigning some of the void space to theˆbres. This apparent densiˆcation is considered responsible for the observed strain hardening behaviour of reinforced sands. The proposed model is able to accommodate any distribution ofˆbre orientation: the orientation ofˆbres plays a key role in explaining the experimentally observed eŠective stress paths.

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“…These results were approved by testing different types of materials and testing procedures, under dynamic and undrained loading conditions. It was experienced that number of cycles to liquefaction was higher, with fiber inclusion [17,18].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Behavior of a Clayey Sand Reinforced with Polypropylene Fiber

et al. 2017

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It is a well-identified fact that more elaborate laboratory studies should be carried out for evaluation of dynamic properties of different types of soils. Regardless of the mechanisms affecting the mechanical behaviour of the soils, past studies reveal that existence of fiber positively affects the strength of either cohesive or non-cohesive soils. A short literature survey provides numerous studies on the stress-strain behaviour of fine/coarse soils, reinforced by polypropylene fiber. On the other hand, studies concerning fiber reinforced soils subjected to dynamic loading are relatively rare. Therefore, in this research it was intended to investigate the effects of polypropylene fiber inclusion on the dynamic behavior of a clayey sand soil, within an experimental framework. In this scope, a number of cyclic triaxial compression tests were conducted to assess the effect of fiber presence. The effects of fiber length and content were experimentally evaluated. Hence, the variation of shear modulus ratio and damping ratio values by shear deformation was plotted to observe the effects of fiber length and inclusion level as well. The results are presented along with detailed evaluations.

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Static liquefaction of fibre reinforced sand under monotonic loading

Cited by 112 publications

References 54 publications

Evaluation on Failure of Fiber-Reinforced Sand

Evaluation on Failure of Fiber-Reinforced Sand

Modelling the Undrained Response of Fibre Reinforced Sands

Dynamic Behavior of a Clayey Sand Reinforced with Polypropylene Fiber

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