Mechanical Response of Two Carbonate Sediments From Australia’s North West Shelf

Lehane, Barry; Carraro, J. Antônio H.; Boukpeti, Nathalie; Elkhatib, Sarah

doi:10.1115/omae2014-23340

Cited by 4 publications

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…cv was measured at 36.1 ° A Simple Breakage Model for Calcareous Sand and Its FE Implementation Li et al Submitted July 2021, Revised Nov 2021, Rerevised Feb 2022 8 through a triaxial compression test with a loose sample (Dr = 5%). This value is higher than that of commonly tested silica sands (cv = 31 ° ~ 32 °; Lehane et al, 2014;Teng et al, 2019).…”

Section: Physical Properties Of Sandcontrasting

confidence: 55%

A Simple Breakage Model for Calcareous Sand and Its FE Implementation

Cheng

Hossain

et al. 2022

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

This paper reports the development of a particle breakage (MMC-PB) model within a finite element framework based on the modified Mohr-Coulomb model (MMC). A modified form of the strength-dilatancy relationship is used to incorporate additional energy consumed due to particle breakage. A new particle breakage index is introduced and constitutively linked to the mobilized friction angle. The model is verified against carefully conducted drained triaxial tests on medium dense calcareous sand obtained from offshore Australia as well as other published data. The model is implemented in the finite element (FE) program ABAQUS for both small strain and large deformation FE analyses in practical field problems. Several important microscopic observations can be made from the proposed model that are not limited to identifying soil regions where particle breakage is maximized. Due to its inherent simplicity, the newly developed model can provide reasonable predictions for soil-structure interaction problems in calcareous sands.

show abstract

Section: Physical Properties Of Sandcontrasting

confidence: 55%

A Simple Breakage Model for Calcareous Sand and Its FE Implementation

Cheng

Hossain

et al. 2022

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

show abstract

“…Thus far a very few researchers have focused on caisson anchor response in calcareous soils (e.g. Randolph et al, 1998;Lehane et al, 2014;Koh et al, 2017Koh et al, , 2020. However, there are no corresponding industry standards and guidelines given in ISO (2016).…”

Section: Aim Of This Studymentioning

confidence: 99%

Insight into the Behavior of a Caisson Anchor under Cyclic Loading in Calcareous Silt

Mohiuddin

Hossain

Kim

et al. 2022

J. Geotech. Geoenviron. Eng.

View full text Add to dashboard Cite

This paper provides insight into the behaviour of a stiffened caisson anchor under inclined cyclic loading in calcareous silt. A series of tests was conducted in a beam centrifuge. A monotonic test was first performed, quantifying the pure monotonic capacity, and then four cyclic loading tests varying mean load, amplitude and number of cycles. Cyclic soil characterisation T-bar tests and caisson tests were linked. Undrained cyclic T-bar tests led to generate excess pore pressure, resulting in degradation of soil strength and stiffness. For partially drained cyclic caisson tests, the excess pore pressure generated during initial undrained monotonic loading experienced partial dissipation. Healing due to consolidation outweighed the damage due to initial pore pressure generation. Post-cyclic monotonic capacity was found to be up to 35% higher compared to the pure monotonic capacity unless the anchor failed during cyclic loading. Measured rotation indicated the evolution of anchor failure mechanism. Caisson capacity under inclined loading was presented as a failure envelope, with the effect of cyclic loading accentuated. The contribution of the soil-chain interaction on the caisson capacity was minimal. No trenching was apparent on the soil surface, and no gap was formed around the anchor, in the considered centrifuge testing conditions.

show abstract

Life Cycle Changes in p-y Stiffness for a Conductor Pile Installed in Carbonate Silt

Doherty

White

Watson

et al. 2018

Lecture Notes in Civil Engineering

View full text Add to dashboard Cite

Lateral soil stiffness has a strong influence on the overall strength and fatigue life of well conductors and piles. This paper reviews data from centrifuge testing of a short model pile embedded in carbonate silt, which was subjected to packets of cyclic lateral displacement. Key conclusions are that (i) cyclic lateral stiffness is significantly affected by prior loading history due to the generation and dissipation of pore pressure, (ii) the generation process leads to the wellrecognized softening of p-y curves, (iii) the dissipation process leads to a lessrecognised stiffening of the response, and (iv) carbonate silts show a different shape of cyclic lateral response compared to non-carbonate clays, meaning that existing 'fully degraded' steady state p-y models are not appropriate. Future ideas to capture these improvements in lateral response modelling are set out, with the aim of allowing more accurate and reliable design of conductors and piles.

show abstract

Mechanical Response of Two Carbonate Sediments From Australia’s North West Shelf

Cited by 4 publications

References 7 publications

A Simple Breakage Model for Calcareous Sand and Its FE Implementation

A Simple Breakage Model for Calcareous Sand and Its FE Implementation

Insight into the Behavior of a Caisson Anchor under Cyclic Loading in Calcareous Silt

Life Cycle Changes in p-y Stiffness for a Conductor Pile Installed in Carbonate Silt

Contact Info

Product

Resources

About