# Publications in Offshore Foundations and Structures

Theses | Journal Papers | Conference papers | Departmental Reports

Copyright of the papers below rests with a variety of different parties. They are made available solely on the same basis that we would supply a single copy of a paper to an individual. It is up to you to ensure that your use of a paper does not infringe copyright law

### Theses

**Gue, S.S.**(1984) D.Phil. "Ground Heave Around Driven Piles in Clay"

abstract | thesis (4.64MB, pdf)**Evans, K.M.**(1987) D.Phil. "A Model Study of the End Bearing Capacity of Piles in Layered Calcareous Soils"

abstract | thesis (5.86MB, pdf)**de Santa Maria, P.E.L.**(1988) D.Phil. "Behaviour of Footings for Offshore Structures under Combined Loads"

abstract | thesis (5.89MB, pdf)**Bell, R.W.**(1991) M.Sc. "The Analysis of Offshore Foundations Subjected to Combined Loading"

abstract | thesis (5.73MB, pdf)**Martin, C.M.**(1994) D.Phil. "Physical and Numerical Modelling of Offshore Foundations Under Combined Loads"

abstract | entire thesis (30.1MB, pdf) | chapters 1-4 (11.4MB, pdf) | chapters 5-8 (9.65MB, pdf) | tables and figures (9.10MB, pdf)**Chaudhry, A.R.**(1994) D.Phil. "Static Pile-Soil-Pile Interaction in Offshore Pile Groups"

abstract | thesis (7.89MB, pdf)**Thompson, R.S.G.**(1996) D.Phil. "Development of Non-Linear Numerical Models Appropriate for the Analysis of Jack-up Units"

abstract | thesis (14.4MB, pdf)**Ngo Tran, C.L.**(1996) D.Phil. "The Analysis of Offshore Foundations Subjected to Combined Loading"

abstract | thesis (7.68MB, pdf)**Mangal, J.K.**(1999) D.Phil. "Partially Drained Loading of Shallow Foundations on Sand"

abstract | thesis (16.3MB, pdf)**Cassidy, M.J.**(1999) D.Phil. "Non-Linear Analysis of Jack-up Structures Subjected to Random Waves"

abstract | entire thesis (3.1MB, pdf)**Byrne, B.W.**(2000) D.Phil. "Investigations of Suction Caissons in Dense Sand"

abstract | entire thesis (8.9MB, pdf)**Nguyen-Sy, L.**(2005) D.Phil. "The Theoretical Modelling of Circular Shallow Foundation for Offshore Wind Turbines"__abstract__|__thesis (5.06Mb, pdf)__**Villalobos Jara, F.A.**(2006) D.Phil. "Model Testing of Foundations for Offshore Wind Turbines"__abstract__|__thesis (22.87Mb, pdf)__**Hazell, E.**(2008) D.Phil. "Numerical and Experimental Studies of Shallow Cone Penetration in Clay"__abstract__|__thesis (7.16Mb, pdf)__**Cotter, O.**(2009) D.Phil. "The Installation of Suction Cassion Foundations for Offshore Renewable Energy Structures"__abstract__|__thesis (18.8Mb, pdf)__**Schupp, J.**(2009) D.Phil. "Upheaval Buckling and Flotation of Buried Offshore Pipelines"

### Journal Papers

**Randolph, M.F. and Houlsby, G.T. (1984)**"The Limiting Pressure on a Circular Pile Loaded Laterally in Cohesive Soil."*Géotechnique***34**4: 613-623. Paper as pdf (4065k)

a) reply to discussion by W.H. Ward:*Géotechnique***36**3: 457**Randolph, M.F., Leong, E.C. and Houlsby G.T. (1991)**"One Dimensional Analysis of Soil Plugs in Pipe Piles."*Géotechnique***41**4: 587-598. Paper as pdf (4467k)**Butterfield, R., Houlsby, G.T. and Gottardi, G. (1997)**"Standardised Sign Conventions and Notation for Generally Loaded Foundations."*Géotechnique***47**4: 1051-1052. Paper as pdf (487k)

a) corrigendum:*Géotechnique***48**1: 157**Williams, M.S., Thompson, R.S.G. and Houlsby, G.T. (1998)**"Non-Linear Dynamic Analysis of Offshore Jack-up Units."*Computers and Structures***69**: 171-180. Paper as pdf (3165k)**Williams, M.S., Thompson, R.S.G. and Houlsby, G.T. (1999)**"A Parametric Study of the Non-Linear Dynamic Behaviour of an Offshore Jack-up Unit."*Engineering Structures***21**: 383-394. Paper as pdf (3165k)**Houlsby, G.T. and Puzrin, A.M. (1999)**"Closed Form Solutions for the Bearing Capacity of a Strip Footing on Clay under Combined Loadings."*Proceedings of the Royal Society of London, Series A***455**1983: 893-916. Paper as pdf (263k)**Gottardi, G., Houlsby, G.T. and Butterfield, R. (1999)**"The Plastic Response of Circular Footings on Sand under General Planar Loading."*Géotechnique***49**4: 453-470. Paper as pdf (2406k)**Houlsby, G.T. and Byrne, B.W. (2000)**"Suction caisson foundations for offshore wind turbines and anemometer masts."*Journal of Wind Engineering***24**4: 249-255. Paper as pdf (87k)**Martin, C.M. and Houlsby, G.T. (2000)**"Combined Loading of Spudcan Foundations on Clay: Laboratory Tests."*Géotechnique***50**4: 325-338. Paper as pdf (1644k)**Houlsby, G.T. and Byrne, B.W. (2001)**Discussion on 'Sieffert, J.-G. and Bay-Gress, Ch. (2001)."Comparison of European bearing capacity calculation methods for shallow foundations."*Geotechnical Engineering***143**: 65-74.'*Geotechnical Engineering***149**: 63-64. Paper as pdf (203k)**Byrne, B.W. and Houlsby, G.T. (2001)**"Observations of Footing Behaviour on Loose Carbonate Sands."*Géotechnique***51**5: 463-466. Paper as pdf (436k)**Cassidy, M.J., Eatock Taylor, R. and Houlsby, G.T. (2001)**"Analysis of jack-up units using a constrained NewWave methodology."*Applied Ocean Research***23**: 221-234. Paper as pdf (607k)**Martin, C.M. and Houlsby, G.T. (2001)**"Combined Loading of Spudcan Foundations on Clay: Numerical Modelling."*Géotechnique***51**8: 687-700. Paper as pdf (1257k)**Houlsby, G.T. and Cassidy, M.J. (2002)**"A plasticity model for the behaviour of footings on sand under combined loading."*Geotéchnique***52**2: 117-129. Paper as pdf (1290k).**Awarded the "David Hislop Award" by the Institution of Civil Engineers in 2003.****Cassidy, M.J., Taylor, P.H., Eatock Taylor, R. and Houlsby, G.T. (2002)**"Evaluation of Long-Term Extreme Response Statistics of Jack-up Platforms."*Ocean Engineering***29**: 1603-1631. Paper as pdf (665k)**Byrne, B.W. and Houlsby, G.T. (2002)**"Experimental investigations of the response of suction caissons to transient vertical loading."*Proc. ASCE, Journal of Geotechnical Engineering***128**11: 926-939. Paper as pdf (676k)**Cassidy, M.J. and Houlsby, G.T. (2002)**"Vertical Bearing Capacity Factors for Conical Footings on Sand."*Géotechnique***52**9: 687-692. Paper as pdf (424k)**Cassidy, M.J., Byrne, B.W. and Houlsby G.T. (2002)**"Modelling the behaviour of a circular footing under combined loading on loose carbonate sand."*Géotechnique***52**10: 705-712. Paper as pdf (461k)**Byrne, B.W., Houlsby, G.T., Martin, C.M. and Fish, P.M. (2002)**"Suction caisson foundations for offshore wind turbines."*Journal of Wind Engineering***26**3: 145-155. Paper as pdf (4411k)**Houlsby, G.T and Martin, C.M. (2003)**"Undrained Bearing Capacity Factors for Conical Footings on Clay."*Géotechnique***53**5: 513-520. Paper as pdf (184k)**Cassidy, M.J., Houlsby, G.T. and Eatock Taylor, R. (2003)**"Probabilistic Models Applicable for the Short Term Extreme Response Analysis of Jack-up Platforms."*Journal of Offshore Mechanics and Arctic Engineering, Trans. ASME***125**4: 249-263. Paper as pdf (669k)**Byrne, B.W. and Houlsby, G.T. (2003)**"Foundations for offshore wind turbines."*Phil. Trans. Roy. Soc. A***361**, Dec: 2909-2930. Paper as pdf (1565k)**Byrne, B.W. and Houlsby, G.T. (2004)**"Experimental investigations of the response of suction caissons to transient combined loading."*Proc. ACSE, Journal of Geotechnical and Geoenvironmental Engineering***130**3: 240-253. Paper as pdf (1135k).**Cassidy, M.J., Byrne, B.W. and Randolph, M.F. (2004)**"A comparison of the combined load behaviour of spudcan and caisson foundations on soft normally consolidated clay".*Géotechnique***54**2: 91-106. Paper as pdf (524k).**Cassidy, M.J., Martin, C.M. and Houlsby, G.T. (2004)**"Development and application of force resultant models describing jack-up foundation behaviour."*Journal of Marine Structures***17**3-4: 165-193.**Vlahos, G., Martin, C.M., Prior, M. and Cassidy, M.J. (2004)**"Development of a model jack-up unit for the study of soil-structure interaction on clay."*International Journal of Physical Modelling in Geotechnics***5**2: 31-48.**Martin, C.M. (2004)**"Discussion of "Calculations of Bearing Capacity Factor N Using Numerical Limit Analyses" by Boonchai Ukritchon, Andrew J. Whittle, and C. Klangvijit."*Proc. ASCE, Journal of Geotechnical and Geoenvironmental Engineering***130**10: 1106-1107.**Houlsby, G.T. and Byrne, B.W. (2005)**"Design procedures for installation of suction caissons in clay and other soils."*Proc ICE - Geotechnical Engineering***158**2: 75-82. paper as pdf (235kb)**Houlsby, G.T. and Byrne, B.W. (2005)**"Design procedures for installation of suction caissons in sand."*Proc ICE - Geotechnical Engineering***158**3: 135-144. paper as pdf (233kb)**Houlsby, G.T., Kelly, R.B., Huxtable, J. and Byrne, B.W. (2005)**"Field trials of suction caissons in clay for offshore wind turbine foundations."*Géotechnique***55**4: 287-296. paper as pdf (586kb).**Awarded a “Halcrow Prize” by the Institution of Civil Engineers in 2006.****Houlsby, G.T., Cassidy, M.J. and Einav, I.****(2005)**"A generalised winkler model for the behaviour of shallow foundations."*Géotechnique***55**6: 449-460.**Doherty, J.P., Houlsby, G.T. and Deeks, A.J. (2005)**"Stiffness of flexible caisson foundations embedded in non-homogeneous elastic soil."*Proc. ASCE, Journal of Geotechnical and Geoenvironmental Engineering***131**12: 1498-1508.**Martin, C.M. & Randolph, M.F. (2006)**"Upper bound analysis of lateral pile capacity in cohesive soil."*Géotechnique***56**2:141-145.**Houlsby, G.T., Kelly, R.B., Huxtable, J. and Byrne, B.W. (2006)**“Field trials of suction caissons in sand for offshore wind turbine foundations.”*Géotechnique***56**1: 3-10.**Bienen, B., Byrne, B.W., Houlsby, G.T. and Cassidy, M.J. (2006)**“Investigating six degree of freedom loading of shallow foundations on sand.”*Géotechnique***56**6: 367-379.**Kelly, R.B., Houlsby, G.T. and Byrne, B.W. (2006)**“A comparison of field and laboratory caisson tests in sand and clay.”*Géotechnique***56**9: 617-626.**Kelly, R.B., Houlsby, G.T. and Byrne, B.W. (2006)**“Transient vertical loading of model suction caissons in a pressure chamber.”*Géotechnique***56**10: 665-675.**Vlahos, G., Cassidy, M.J. and Byrne, B.W. (2006)**“The behaviour of spudcan footings on clay subjected to combined cyclic loading.”*Applied Ocean Research***28**3: 209-221.**Cassidy, M.J., Randolph, M.F. and Byrne, B.W. (2006)**“A plasticity model describing caisson behaviour in clay.”*Applied Ocean Research***28**5: 345-358.**Bienen, B., Byrne, B.W., Houlsby, G.T. and Cassidy, M.J. (2007)**Reply to discussion by D.V. Morris on “Investigating six degree of freedom loading of shallow foundations on sand.*Géotechnique***56**6: 367-379.”*Géotechnique***57**5: 483-484.**Salgado, R., Houlsby, G.T. and Cathie, D.N. (2008)**"Contributions to Géotechnique 1948-2007: Foundation engineering."*Géotechnique***58**5: 369-375.**Villalobos, F.A., Byrne, B.W. and Houlsby, G.T. (2009)**“Drained capacity of suction caissons under monotonic loading for offshore applications.”*Soils and Foundations***49**3: 477-488.**Vlahos, G., Cassidy, M.J. and Martin, C.M. (2009)**"Experimental investigation of the system behaviour of a model three-legged jack-up on clay."*Applied Ocean Research***30**4: 323-337.**Hodder, M.S. and Byrne, B.W. (2010)**“Experiments of a model catenary riser interacting with a sandy seabed.”*Applied Ocean Research***32**2: 146-157.**Leblanc, C., Houlsby, G.T. and Byrne, B.W. (2010)**“Response of stiff piles to long term cyclic loading.”*Géotechnique***60**2: 79-90.**Awarded the “TK Hsieh Award” by the Institution of Civil Engineers in 2011.****Leblanc, C., Byrne, B.W. and Houlsby, G.T. (2010)**“Response of stiff piles to random two-way lateral loading.”*Géotechnique***60**9: 715-721.**Villalobos, F.A., Byrne, B.W. and Houlsby, G.T. (2010)**“Model testing of suction caissons on clay subjected to vertical loading.”*Applied Ocean Research***32**4: 414-424.**Byrne, B.W., Schupp, J. and Martin, C.M. (2011)**Discussion on ‘Bransby, M.F. and Ireland, J. (2009). “Rate effects during pipeline upheaval buckling in sand.”*Proc ICE - Geotechnical Engineering***162**: 247-256.’*Proc ICE - Geotechnical Engineering***164**5: 347-349.**Vlahos, G., Cassidy, M.J. and Martin, C.M. (2011)**"Numerical simulation of pushover tests on a model jack-up platform on clay."*Géotechnique***61**11: 947-960.**Houlsby, G.T. and Cassidy, M.J. (2011)**"A simplified mechanically based model for predicting partially drained behaviour of penetrometers and shallow foundations."*Géotechnique Letters*, published online 22 August, E-ISSN 2045-2543.**Martin, C.M. and White, D.J. (2012).**"Limit analysis of the undrained capacity of offshore pipelines."*Géotechnique***62**9: 847-863.**Zhu, B., Byrne, B.W. and Houlsby, G.T. (2012)**“Long term lateral cyclic response of suction caissons in sand.”*Proc. ASCE, Journal of Geotechnical and Geoenvironmental Engineering*, Available on-line Ahead of Print.**Byrne, B.W., Schupp, J., Martin, C.M., Maconochie, A., Oliphant, J. and Cathie, D.N. (2012)**“Uplift behaviour of shallowly buried pipe sections in saturated very loose sand.”*Géotechnique*, Available on-line Ahead of Print.**Williams, E., Byrne, B.W. and Blakeborough, A. (2012)**“Pipe uplift response in loose saturated sand: Rate and density effects.” Submitted and under review.**Mana, D.S.K., Gourvenec, S. and Martin, C.M. (2012).**"Critical skirt spacing for shallow foundations under general loading." Submitted and under review.

### Conference Papers

**Houlsby, G.T. and Wroth, C.P. (1983)**"Calculation of Stresses on Shallow Penetrometers and Footings."*Proceedings of the International Union of Theoretical and Applied Mechanics (IUTAM)/International Union of Geodesy and Geophysics (IUGG) Symposium on Seabed Mechanics*, Newcastle upon Tyne, September, ISBN 0-86010-504-0, pp 107-112. Paper as pdf (2658k)**Houlsby, G.T., Evans, K.M. and Sweeney, M. (1988)**"End Bearing Capacity of Model Piles in Layered Calcareous Soils."*Proceedings of the International Conference on Calcareous Sediments*, Perth, March, Vol. 1, ISBN 90-6191-753-0, pp 209-214. Paper as pdf (2043k)**de Santa Maria, P.E.L. and Houlsby, G.T. (1988)**"Model Tests for Offshore Foundations under Combined Loads."*Proceedings of the Symposium on New Concepts in Laboratory and In Situ Tests in Geotechnical Engineering*, Rio de Janeiro, May, Vol. 2, pp 425-438. Paper as pdf (3622k)**Trickey, J.C., Osborne, J.J., Houlsby, G.T. and James, R.G. (1991)**"Findings from a Joint Industry Study on Foundation Fixity of Jack-up Units."*Offshore Technology Conference*, 6-9 May, Houston, Paper 6615, pp 517-533. Paper as pdf (5650k)**Bell, R.W, Houlsby, G.T. and Burd, H.J (1991)**"Finite Element Analysis of Axisymmetric Footings Subjected to Combined Loads."*Proceedings of the International Conference on Computer Methods and Advances in Geomechanics*, Cairns, Australia, May 6-10, Vol. 3, pp 1765-1770. Paper as pdf (2290k)**Houlsby, G.T. (1992)**Discussions on "Magnus Foundation Monitoring Project."*Proceedings of the Conference on Recent Large-Scale Fully Instrumented Pile Tests in Clay*, London, 23-24 June, Thomas Telford, ISBN 0-7277-1918-1, pp 117 and 1197.**Houlsby, G.T. and Martin, C.M. (1992)**"Modelling of the Behaviour of Foundations of Jack-up Units on Clay." Proceedings of the Wroth Memorial Symposium, Predictive Soil Mechanics, Oxford, July 27-29, ISBN 0-7277-1916-5, pp 339-358. Paper as pdf (5090k)-
**Houlsby, G.T., Nutt, N.R.F. and Sweeney, M. (1994)**"End Bearing Capacity of Piles in Carbonate Soils."*Proceedings of the 13th International Conference on Soil Mechanics and Foundation Engineering*, New Delhi, January, Vol. 2, pp 635-638. Paper as pdf (1889k) **Haworth, R., Houlsby, G.T. and Blair Fish, P.M. (1998)**"Endurance and Stability of Steel Structures on the Seabed."*Proc. SUT Conference on Offshore Site Investigation and Foundation Behaviour*, 'New Frontiers', London, 22-24 September, ISBN 0 906940 338, pp 515-540. Paper as pdf (7206k)**Mangal, J.K and Houlsby, G.T. (1999)**"Partially-Drained Loading of Shallow Foundations on Sand."*Offshore Technology Conference*, 3-6 May, Houston, Paper 10991. Paper as pdf (161kB)**Byrne, B.W. and Houlsby, G.T. (1999)**"Drained Behaviour of Suction Caisson Foundations on Very Dense Sand."*Offshore Technology Conference*, 3-6 May, Houston, Paper 10994. Paper as pdf (934kB)**Cassidy, M.J. and Houlsby, G.T. (1999)**"On the Modelling of Foundations for Jack-up Units on Sand."*Offshore Technology Conference*, 3-6 May, Houston, Paper 10995. Paper as pdf (376kB)**Martin, C.M. and Houlsby, G.T. (1999)**"Jackup Units on Clay: Structural Analysis with Realistic Modelling of Spudcan Behaviour."*Offshore Technology Conference*, 3-6 May, Houston, Paper 10996. Paper as pdf (156kB)**Bransby, M.F. and Martin, C.M. (1999)**"Elasto-plastic Modelling of Bracket Foundations."*Proceedings of the 7th International Symposium on Numerical Models in Geomechanics (NUMOG VII)*, Graz, 1-3 September, pp 425-430. Rotterdam: Balkema.**Byrne, B.W. and Houlsby, G.T. (2000)**"Experimental Investigations of the Cyclic Response of Suction Caissons in Sand."*Offshore Technology Conference*, 1-4 May, Houston, Paper 12194. Paper as pdf (606kB)**Pinna, R., Martin, C.M. and Ronalds, B.F. (2000)**"Soil Plasticity effects on the buckling of an embedded finite length shell."*Proc. 1st Int. Conf. on Structural Stability and Dynamics*, Taipei, 7-9 December, 6pp.**Cassidy, M.J., Houlsby, G.T. and Eatock Taylor, R. (2001)**"Application of probabilistic models to the response analysis of jack-ups."*Proc. 11th Int. Offshore and Polar Engng Conf.*, Stavanger, Norway, 2001-JSC-153. Paper as pdf (762kB)**Vlahos, G., Martin, C.M. and Cassidy, M.J. (2001)**"Experimental investigation of a model jack-up unit on clay."*Proc. 11th Int. Offshore and Polar Engng Conf.*, Stavanger, Norway, 2001-JSC-152. Paper as pdf (888k)**Martin, C.****M. (2001)**"Impact of centrifuge modelling on offshore foundation design."*Proc of the Conf on Constitutive and Centrifuge Modelling: Two Extremes*, Monte Verita, Switzerland, 8-13 July, Balkema.**Martin, C.M. and Randolph, M.F. (2001)**"Application of the lower and upper bound theorems of plasticity to collapse of circular foundations."*Proc. 10th Int. Conf. of IACMAG*, Tucson, Vol. 2, pp 1417-1428.**Pinna, R., Martin, C.M. and Ronalds, B.F. (2001)**"Guidance for the design of suction cassions against buckling during installation in clay soils."*Proc. 11th Int. Offshore and Polar Engineering Conference*, Stavanger, Vol. 2, pp 662-668.**Marin, C.M. (2001)**"Vertical bearing capacity of skirted circular foundations on Tresca soil."*Proc. 15th Int. Conference on Soil Mechanics and Geotehcnical Engineering*, Istanbul, Vol. 1, pp 743-746.**Byrne, B.W., Houlsby, G.T. and Martin, C.M. (2002)**"Cyclic Loading of Shallow Foundations on Sand."*Proc. Int. Conf. on Physical Modelling in Geotechnics (ICPMG)*, St John’s, Newfoundland, Canada. Paper as pdf (166 kB)**Byrne, B.W. and Cassidy, M.J. (2002)**"Investigating the Response of Offshore Foundations in Soft Clay Soils."*Proc. 21st Int. Conf. on Offshore Mechanics and Arctic Engineering OMAE'02*, Oslo, Paper OMAE2002-28057. Paper as pdf (471k)**Byrne, B.W. and Houlsby, G.T. (2002)**"Investigating Novel Foundations for Offshore Wind Turbines."*Proc. 21st Inst. Conf. on Offshore Mechanics and Artic Engineering OMAE'02*, Oslo, Paper OMAE2002-28432. Paper as pdf (274kb)**Cassidy, M.J., Houlsby, G.T., Hoyle, M. and Marcom, M. (2002)**"Determining Appropriate Stiffness Levels for Spudcan Foundations Using Jack-up Case Records."*Proc. 21st Int. Conf on Offshore Mechanics and Arctic Engineering OMAE’02*, Oslo, OMAE2002-28085. Paper as pdf (478 kB)**Houlsby, G.T. (2003)**"Modelling of Shallow Foundations for Offshore Structures."*Proc. International Conference on Foundations*, Dundee, 2-5 September. Paper as pdf (243 kB)**Kelly, R.B., Byrne, B.W., Houlsby, G.T. and Martin, C.M. (2003)**"Pressure Chamber Testing of Model Caisson Foundations in Sand."*Proc. International Conference on Foundations*, Dundee, 2-5 September. Paper as pdf (97 kB)**Byrne, B.W., Villalobos, F. Houlsby, G.T. and Martin, C.M. (2003)**"Laboratory Testing of Shallow Skirted Foundations in Sand."*Proc. International Conference on Foundations*, Dundee, 2-5 September. Paper as pdf (162 kB)**Martin, C.M. (2003)**"New Software for Rigorous Bearing Capacity Calculations",*Proc. International Conference on Foundations*, Dundee, 2-5 September.**Cassidy, M.J., Martin, C.M. and Houlsby, G.T. (2003)**"Development and application of force resultant models describing Jack-up Foundation behaviour."*Proc. 9th Int. Conf. on Jack-Up Platform Design, Construction and Operation*, September 23-24, City University, London. Paper as pdf (861kB)**Kelly, R.B., Byrne, B.W., Houlsby, G.T. and Martin, C.M. (2004)**"Model tests in saturated sand to investigate the behaviour of multi-footing caisson foundations for offshore wind turbines."*Proc International Symposium of Offshore and Polar Engineering 2004*, Toulon, France, Vol. 2, pp 638-641.**Villalobos, F.A., Houlsby, G.T. and Byrne, B.W. (2004)**"Suction caisson foundations for offshore wind turbines."*Proc 5th Chilean Conference of Geotechnics (Congreso Chileno de Geotecnia)*, Santiago, 24-26 November 2004.**Martin, C.M. (2005)**"Exact bearing capacity calculations using the method of characteristics."*Proc. 11th International Conference of IACMSG*, Turin, Vol. 4, pp 441-450.**Houlsby, G.T., Ibsen, L.B. and Byrne, B.W (2005)**"Suction Caissons for Wind Turbines."*Proc. International Symposium on Frontiers in Offshore Geotechnics*, Perth, Australia, 19-21 September, Taylor and Francis.**Houlsby, G.T., Kelly, R.B. and Byrne, B.W. (2005)**"The Tensile Capacity of Suction Caissons in Sand under Rapid Loading."*Proc. International Symposium on Frontiers in Offshore Geotechnics*, Perth, Australia, 19-21 September, Taylor and Francis.**Lam, N.-S. and Houlsby, G.T. (2005)**"The Theoretical Modelling of a Suction Caisson Foundation using Hyperplasticity Theory."*Proc. International Symposium on Frontiers in Offshore Geotechnics*, Perth, Australia, 19-21 September, Taylor and Francis.**Villalobos, F.A., Byrne, B.W. and Houlsby, G.T. (2005)**"Moment loading of caissons installed in saturated sand."*Proc. International Symposium on Frontiers in Offshore Geotechnics*, Perth, Australia, 19-21 September, Taylor and Francis.**Byrne, B.W. and Houlsby, G.T. (2005)**"Investigating 6 degree-of-freedom loading on shallow foundations."*Proc. International Symposium on Frontiers in Offshore Geotechnics*, Perth, Australia, 19-21 September, Taylor and Francis.**Byrne, B.W. and Houlsby, G.T. (2006)**"Assessing novel foundations options for offshore wind turbines."*Proc. Marine Renewable Energy Conference*, London, 8-9 March**Teh, K.-L., Byrne, B.W. and Houlsby, G.T. (2006)**"Effects of seabed irregularities on loads developed in legs of jack-up units."*Jack-up Asia Conference*, Singapore, 7-8 December.**Schupp, J., Byrne, B.W., Martin, C.M., Oliphant, J., Maconochie, A. and Cathie, D. (2006)**“Pipeline unburial behaviour in loose sand.”*International Conference on Offshore Mechanics and Arctic Engineering*, Hamburg, Germany.**Bienen, B., Cassidy, M.J. , Byrne, B.W. and Houlsby, G.T. (2008)**"3D modelling of a jack-up and its foundations."*Proc. of the 2nd British Geotechnical Association International Conference on Foundations, ICOF 2008*, Dundee, 24-27 June, IHS BRE Press.**Cotter, O., Houlsby, G.T. and Byrne, B.W. (2008)**"Suction caisson installation in sand and clay over sand."*Proc. of the 2nd British Geotechnical Association International Conference on Foundations, ICOF 2008*, Dundee, 24-27 June, IHS BRE Press.**Vlahos, G. Cassidy, M.J. & Martin, C.M. (2008)**"Implementation of a force-resultant model describing spudcan load-displacement behaviour using an implicit integration scheme."*Proc. 18th Int. Offshore and Polar Engineering Conf.*, Vancouver.**Byrne, B.W., Schupp, J., Martin, C.M., Oliphant, J., Maconochie, A. and Cathie, D. (2008)**“Experimental modelling of the unburial behaviour of pipelines.”*Offshore Technology Conference*, Houston, Texas (May).**Osborne, J.J., Houlsby, G.T., Teh, K.L., Bienen, B., Cassidy, M,J., Randolph, M.F. and Leung, C.F. (2009)**"Improved Guidelines for the Prediction of Geotechnical Performance of Spudcan Foundations during Installation and Removal of Jack-up Units."*Offshore Technology Conference*, 4-7 May, Houston, Paper 20291.**Houlsby, G.T. (2010)**"A probabilistic approach to the prediction of spudcan penetration of jack-up units."*2nd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2010*, 8-10 November, Perth, Australia.**Zhu, B., Byrne, B.W. and Houlsby, G.T. (2010)**"Cyclic loading of suction caissons in sand."*2nd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2010*, 8-10 November, Perth, Australia.**Cotter, O.J., Byrne, B.W. and Houlsby, G.T. (2010)**"Installation of Suction Caissons for Offshore Renewable Energy Structures."*2nd International Symposium on Frontiers in Offshore Geotechnics, ISFOG 2010*, 8-10 November, Perth, Australia.**Byrne, B.W. (2011).**“Combined loading of shallow foundations: Application to offshore wind turbines.”*Proceedings of the XV European Conference on Soil Mechanics and Geotechnical Engineering*, Athens Greece**Wong, P.C., Templeton, J.S., Purwana, O.A., Hofstede, H., Cassidy, M.J., Hossain, M.S. and Martin, C.M. (2012).**"Foundation modeling and assessment in the new ISO standard 19905-1."*Offshore Technology Conference*, Houston, Paper No. OTC 23521.**Byrne, B.W. and Houlsby, G.T. (2012).**"Foundation design for offshore wind turbines."*Proceedings of the First International Symposium of Coastal and Offshore Geotechnics*, Hangzhou, China.

### Departmental Reports

**Houlsby, G.T. and Wroth, C.P. (1983)**"Calculation of Stresses on Shallow Penetrometers and Footings." OUEL Report No. 1503/83, (Soil Mechanics Report No. SM041/83), Department of Engineering Science, University of Oxford.**Randolph, M.F. and Houlsby, G.T (1984)**"The Limiting Pressure on a Circular Pile Loaded Laterally in Cohesive Soil." CUED/D-Soils TR147, Cambridge University Engineering Department.**Randolph, M.F, Leong, E.C. and Houlsby, G.T. (1990)**"One Dimensional Analysis of Soil Plugs in Pipe Piles." Research Report No. G1005, Department of Civil and Environmental Engineering, The University of Western Australia.**Martin, C.M. and Houlsby, G.T. (1994)**"Combined Loading Tests of Scale Model Spudcan Footings on Soft Clay: Experimental Data." OUEL Report No. 2029/94, Department of Engineering Science, University of Oxford.**Gottardi, G. and Houlsby, G.T. (1995)**"Model Tests of Circular Footings on Sand Subjected to Combined Loads." OUEL Report No. 2071/95, Department of Engineering Science, University of Oxford.**Butterfield, R., Houlsby, G.T. and Gottardi, G. (1996)**"Standardised Sign Conventions and Notation for Generally Loaded Foundations." OUEL Report No. 2104/96, Department of Engineering Science, University of Oxford.**Williams, M.S., Thompson, R.S.G. and Houlsby, G.T. (1997)**"Non-Linear Dynamic Analysis of Offshore Jack-up Units." OUEL Report No. 2127/97, Department of Engineering Science, University of Oxford.**Williams, M.S., Thompson, R.S.G. and Houlsby, G.T. (1997)**"A Parametric Study of the Non-Linear Dynamic Behaviour of an Offshore Jack-up Unit." OUEL Report No. 2128/97, Department of Engineering Science, University of Oxford.**Gottardi, G., Houlsby, G.T. and Butterfield, R. (1997)**"The Plastic Response of Circular Footings on Sand under General Planar Loading." OUEL Report No. 2143/97, Department of Engineering Science, University of Oxford.**Houlsby, G.T. and Puzrin, A.M. (1997)**"The Bearing Capacity of a Strip Footing on Clay under Combined Loading." OUEL Report No. 2144/97, Department of Engineering Science, University of Oxford.**Martin, C.M. and Houlsby, G.T. (1998)**"Combined Loading of Spudcan Foundations on Clay: Laboratory Tests." Research Report No. G1386, Department of Civil and Environmental Engineering, The University of Western Australia and OUEL Report No. 2190/98, Department of Engineering Science, University of Oxford.**B.W. Byrne and G.T. Houlsby (1998)**"Model Testing of Circular Flat Footings on Uncemented Loose Carbonate Sand." OUEL Report No. 2192/98, Department of Engineering Science, University of Oxford. Report as pdf (1300k)**Houlsby, G.T., Byrne, B.W., Cassidy, M.J., Mangal, J.K and Martin, C.M. (1999)**"Research on Offshore Foundations: Papers at the Offshore Technology Conference 1999." OUEL Report No. 2197/98, Department of Engineering Science, University of Oxford.**M.J. Cassidy, R. Eatock Taylor and G.T. Houlsby (2000)**"Analysis of Jack-Up Units Using a Constrained NewWave Methodology." OUEL Report No. 2224/00, Department of Engineering Science, University of Oxford.**Cassidy, M.J. and Byrne, B.W. (2001).**"Drum centrifuge model tests comparing the performance of spudcans and caissons in kaolin clay." OUEL Report No 2248/01. Department of Engineering Science, The University of Oxford. Report as pdf (4277k)**Martin, C.M. (2003).**"User guide for ABC - Analysis of Bearing Capacity." OUEL Report No. 2261/03, Department of Engineering Science, University of Oxford.**Houlsby, G.T. and Byrne, B.W. (2004).**"Calculation procedures for installation of suction caissons." OUEL Report No 2268/04. Department of Engineering Science, The University of Oxford. Report as pdf (278kb)**Houlsby, G.T., Martin, C.M., Byrne, B.W., Kelly, R.B., Hazell, E.J., Nguyen-Sy, L, Villalobos, F.A. and Ibsen, L-B. (2005).**"Research on Offshore Foundations: Papers at the International Symposium Frontiers in Offshore Geotechnics. Perth, Australia, 2005." OUEL Report No. 2275/05. Department of Engineering Science, The University of Oxford. Report as pdf (3.86MB)**Houlsby, G.T., Kelly,R.B., Huxtable, J., and Byrne, B.W. (2005).**"Field Testing of Suction Caissons at Bothkennar and Luce Bay." OUEL Report No. 2276/05. Department of Engineering Science, The University of Oxford. Report as pdf (3.25MB)**Vlahos, G., Cassidy, M.J. and Byrne, B.W. (2005).**"The behaviour of spudcan footings on clay subjected to combined cyclic loading". OUEL Report No. 2286/05. Department of Engineering Science, The University of Oxford. Report as pdf (776kb)**Bienen, B., Byrne, B.W., Houlsby, G.T. (2005)**. "Six degree-of-freedom loading of a circular flat footing on loose sand: experimental data. OUEL Report No. 2289/05. Department of Engineering Science, The University of Oxford. Report as pdf (6MB)**Kelly, R.B., Houlsby, G.T. and Byrne, B.W. (2006).**“Transient vertical loading of model suction caissons in a pressure chamber.” OUEL Report No. 2291/06. Department of Engineering Science, The University of Oxford.