2013 Australian Laureate Fellowship - Prof Mark Cassidy - New Frontiers in Offshore Geotechnics: Securing Australia's Energy Future (Transfer In)

Mitigation of punch-through in stiff-over-soft clay by changing spudcan shape

JM Lee, MS Hossain, YH Kim, MJ Cassidy, Y Hu

2022-12-15

This study focuses on easing or eliminating potential punch-through in two-layer stiff-over-soft clay deposits by tweaking spudcan..

Two-Dimensional Bearing Capacity of a Spudcan in Clay After Penetrating Through Top Sand

Pan Hu, Mark Cassidy

2020-12-01

This paper presents a series of numerical investigations of the capacity of the foundations of a spudcan in clay after it penetrat..

Practical Large-Deformation Finite-Element Method for 3D Geotechnical Problems Involving Free Surface Deformations

W Zhang, MJ Cassidy, Y Tian

2020-06-01

The remeshing and interpolation technique with small-strain (RITSS) finite-element method has been widely adopted to address a bro..

Observations during suction bucket installation in sand

R Ragni, C O'Loughlin, B Bienen, M Cassidy, S Stanier

2020-05-01

Suction buckets represent a viable solution as foundations for offshore wind turbines. Installation in sand is relatively straight..

Breakout force required for jack-up spudcan extraction from sand-over-clay seabeds

P Hu, M Cassidy, F Sahdi, S Stanier

2020-04-21

Spudcan retrieval from clay soils remains a major concern offshore as the extraction force required to overcome suction and soil r..

Mitigating punch-through on sand-over-clay using skirted foundations

JM Lee, YH Kim, MS Hossain, MJ Cassidy, Y Hu, SG Park

2020-04-01

This paper investigates the potential for using skirted foundations as an alternative to spudcans in an attempt to mitigate punch-..

Volumetric Particle Size Distribution and Variable Granular Density Soils

RD Beemer, A Bandini-Maeder, J Shaw, MJ Cassidy

2020-03-01

This article discusses particle size distribution (PSD) by sieving as it relates to variable granular density soils such as hemipe..

Physical and numerical study of the combined bearing capacity of hybrid foundation systems

N Cheng, C Gaudin, MJ Cassidy

2019-05-01

In the search for enhanced alternatives to the conventional footings of jack-up platforms, the offshore industry has turned to nov..

Impact of Biology on Particle Crushing in Offshore Calcareous Sediments

RD Beemer, A Sadekov, U Lebrec, J Shaw, A Bandini-Maeder, MJ Cassidy

2019-01-01

© 2019 American Society of Civil Engineers. Sandy hemipelagic calcareous sediments are quite complex soils. In some instances, the..

Bearing capacity on sand overlying clay: An analytical model for predicting post peak behaviour

P Hu, MJ Cassidy, MF Randolph

2018-05-01

New analytical models have recently been presented for evaluating the peak bearing capacity of circular footings penetrating sand-..

The granular structure of two marine carbonate sediments

RD Beemer, AN Bandini-Maeder, J Shaw, U Lebrec, MJ Cassidy

2018-01-01

Calcareous sediments are prominent throughout the low-latitudinal offshore environment and have been known to be problematic for o..

Predicting jack-up spudcan installation in sand overlying stiff clay

P Hu, MJ Cassidy

2017-12-01

There has been a constant trend towards larger mobile jack-ups capable of operating for extended periods in deeper water and in ha..

Combined loading capacity of a spudcan in clay after penetrating through a sand layer

P Hu, B Bienen, MJ Cassidy

2017-01-01

During offshore operations, the spudcan footings of mobile jack-ups are subjected to combined vertical, horizontal and moment (V, ..

Development of a p-wave transponder system for tracking buried objects in 1-g and geotechnical centrifuge models

RD Beemer, A Van Dam, M Cassidy

2017-01-01

Locating and tracking buried objects underground can be a difficult task especially in the case of plate anchors in soft clays. Th..

Effects of irregular nonlinear ocean waves on the dynamic performance of an example jack-up structure during an extreme event

J Mirzadeh, M Kimiaei, MJ Cassidy

2016-09-01

In this paper, the effects of the nonlinearity and irregularity of ocean waves on the nonlinear dynamic response of a jack-up stru..

Numerical modelling of the effects of consolidation on jack-up spudcan penetration

R Ragni, D Wang, D Mašín, B Bienen, MJ Cassidy, SA Stanier

2016-09-01

The paper addresses the issue of consolidation around jack-up foundations in carbonate silty clay. The problem is tackled with the..

Behaviour of vertically loaded plate anchors under sustained uplift

C Han, D Wang, C Gaudin, CD O’Loughlin, MJ Cassidy

2016-08-01

The use of plate anchors in permanent moorings for deep-water floating structures requires a thorough understanding of their perfo..

Development of a force-resultant model for spudcan footings on loose sand under combined loads

N Cheng, MJ Cassidy

2016-01-01

Spudcans are typical foundations used in shallow to moderate-depth water oil and gas fields to support jack-up drilling units. Und..

Effects of consolidation under a penetrating footing in carbonate silty clay

B Bienen, R Ragni, MJ Cassidy, SA Stanier

2015-09-01

The effects of consolidation under a footing are generally viewed as beneficial due to the resulting increased capacity. Consolida..

A framework to efficiently calculate the probability of failure of dynamically sensitive structures in a random sea

J Mirzadeh, M Kimiaei, MJ Cassidy

2015-01-01

The growing interest in the use of offshore platforms in deeper waters and harsher environments, as well as the desire to extend t..

The effect of water jetting on spudcan extraction from deep embedment in soft clay

O Kohan, B Bienen, C Gaudin, MJ Cassidy

2015-01-01

Self-elevating mobile jack-ups units are designed to move to a new field after operation is completed, requiring extraction of the..

Jack-up push-over analyses featuring a new force resultant model for spudcans in soft clay

Y Zhang, B Bienen, MJ Cassidy

2014-03-01

With the development of the offshore oil and gas industry, mobile jack-up drilling platforms are increasingly utilized in deeper w..

A plasticity model for spudcan foundations in soft clay

Y Zhang, MJ Cassidy, B Bienen

2014-01-01

A plasticity model for predicting the load displacement behaviour of a typical spudcan foundation for offshore jack-up platforms u..

Effect of installation on the bearing capacity of a spudcan under combined loading in soft clay

Y Zhang, D Wang, MJ Cassidy, B Bienen

2014-01-01

Previous numerical analyses of the bearing capacity of embedded footing under combined vertical, horizontal, and moment loading ha..