Conjoint Professor Stephen Lawrence

Conjoint Professor

School of Engineering

Career Summary

Biography

Research Expertise
Analysis, design and experiments on masonry materials and structures, with particular emphasis on flexural tensile strength, bending, reliability, fire resistance and durability. Stochastic analysis of masonry. Numerical modelling of masonry structures. Development of codes and standards.

Collaborations
- Behaviour of unreinforced masonry structures - Bond and flexural resistance of masonry - Reliability of structural masonry - Fire resistance of masonry - Development of codes and standards for masonry


Qualifications

  • Doctor of Philosophy, University of New South Wales

Keywords

  • Construction Materials
  • Masonry Structures
  • Structural Engineering

Fields of Research

CodeDescriptionPercentage
090599Civil Engineering not elsewhere classified85
120299Building not elsewhere classified15
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Book (3 outputs)

YearCitationAltmetricsLink
2004Lawrence S, Page AW, Design Of Clay Masonry For Compression, Clay Brick and Paver Institute, Baulkham Hills, 48 (2004) [A3]
Co-authorsAdrian Page
2001Lawrence S, Page AW, Design of Clay Masonry for Serviceability, Clay Brick and Paver Institute, Baulkham Hills, Australia (2001) [A2]
Co-authorsAdrian Page
1999Lawrence S, Page AW, Design of Clay Masonry for wind and earthquake, Clay Brick and Paver Institute, Australia (1999) [A2]
Co-authorsAdrian Page

Journal article (12 outputs)

YearCitationAltmetricsLink
2014Li J, Masia MJ, Stewart MG, Lawrence SJ, 'Spatial variability and stochastic strength prediction of unreinforced masonry walls in vertical bending', Engineering Structures, 59 787-797 (2014) [C1]

The flexural bond strength of unreinforced masonry (URM) is a key material property affecting wall out-of-plane lateral load capacity. It is well known that the unit flexural bond... [more]

The flexural bond strength of unreinforced masonry (URM) is a key material property affecting wall out-of-plane lateral load capacity. It is well known that the unit flexural bond strength (defined here as the flexural strength of the bond between the brick and lower mortar bed joint associated with any given masonry unit (brick)) varies considerably between units, and that this spatial variability might significantly affect the structural performance and reliability of URM walls in flexure. The paper develops a computational method to predict the strength for non-load bearing single skin URM walls subject to one-way vertical bending considering unit-to-unit spatial variability of flexural bond strength. We characterise the probability distributions of wall strength and examine how spatial variability in unit flexural bond strength affects the variability of base cracking load, mid-height cracking load, peak load and behaviour of clay brick URM walls. This is done using 3-D non-linear Finite Element Analyses (FEA) and stochastic analysis in the form of Monte Carlo simulations. Varying COVs (0.1, 0.3 and 0.5) of unit flexural bond strength are considered. The mean and variance of wall strength are estimated to show the effect of spatial variability of flexural bond strength on wall strength. The failure modes of the wall are compared to show the significant differences between non-spatial and spatial analyses. © 2013.

DOI10.1016/j.engstruct.2013.11.031
Co-authorsMark Masia, Mark Stewart
2011Lawrence S, Stewart MG, 'Model error and structural reliability for unreinforced masonry walls in vertical bending', Masonry International, 24 23-30 (2011) [C1]
Co-authorsMark Stewart
2011Stewart MG, Lawrence S, 'When buildings are too safe', MATERIALS WORLD, 19 30-31 (2011) [O1]
Author URL
Co-authorsMark Stewart
2009Lawrence SJ, Willis CR, Melkoumian N, Griffith MC, 'Earthquake design of unreinforced masonry residential buildings up to 15 metres in height', Australian Journal of Structural Engineering, 10 85-99 (2009) [C1]

The paper summarises the results of a displacement-based assessment (DBA) of the seismic capacity of typical load-bearing unreinforced masonry buildings between two and five store... [more]

The paper summarises the results of a displacement-based assessment (DBA) of the seismic capacity of typical load-bearing unreinforced masonry buildings between two and five storeys in height across a range of site sub-soil classes (B to D) and earthquake hazard factors (0.05 to 0.12), covering all of the capital cities and major regional centres in Australia. The study found that the DBA for out-of-plane bending of walls in the top storey of buildings identified far fewer cases of failure than did a traditional strength-based assessment. A similar trend was observed for the DBA for in-plane shear of walls at the ground storey of buildings. The DBA implied, for all practical purposes, that typical walls will have the in-plane shear displacement capacity to withstand the earthquake induced loads and displacements for any site soil conditions, and earthquake hazard factor up to 0.12. This contrasts with the corresponding strength-based calculations, which identified significant numbers of cases where failure would occur. © Institution of Engineers Australia, 2009.

CitationsScopus - 1
2009Lawrence S, Stewart MG, 'Reliability-based calibration of the capacity reduction factor for design of masonry in compression to AS3700', Australian Journal of Structural Engineering, 9 97-110 (2009) [C1]
Co-authorsMark Stewart
2008Lawrence S, Willis C, Griffith M, 'Earthquake performance of unreinforced masonry residential buildings designed to Australian standards', Australian Journal of Structural Engineering, 8 49-61 (2008) [C1]
CitationsScopus - 1
2008Lawrence S, Sugo HO, Page AW, 'Masonry bond strength and the effects of supplementary cementitious materials', Australian Journal of Structural Engineering, 8 101-114 (2008) [C1]
Co-authorsAdrian Page, Heber Sugo
2007Sugo HO, Page AW, Lawrence S, 'Influence of age on masonry bond strength and mortar microstructure', Canadian Journal of Civil Engineering, 34 1422-1442 (2007) [C1]
DOI10.1139/L07-137
CitationsScopus - 3Web of Science - 2
Co-authorsAdrian Page, Heber Sugo
2007Stewart MG, Lawrence S, 'Model error, structural reliability and partial safety factors for structural masonry in compression', Journal of the British Masonry Society Masonry International, 20 107-116 (2007) [C1]
Co-authorsMark Stewart
2007Lawrence S, 'The use of characteristic strengths in masonry design', Australian Journal of Structural Engineering, 7 225-237 (2007) [C1]
2006Willis CR, Griffith MC, Lawrence S, 'Moment capacities of unreinforced masonry sections in bending', Australian Journal of Structural Engineering, 6 133-145 (2006) [C1]
2002Stewart MG, Lawrence S, 'Structural Reliability of Masonry Walls in Flexure', Masonry International, Vol. 15, No. 2 48-52 (2002) [C1]
Co-authorsMark Stewart
Show 9 more journal articles

Conference (19 outputs)

YearCitationAltmetricsLink
2014Masia MJ, Li J, Stewart MG, Lawrence SJ, 'Spatial variability and stochastic strength prediction of unreinforced masonry walls in horizontal bending.', Proceedings of the 9th International Masonry Conference in Guimaraes, Guimaraes, Portugal (2014) [E1]
Co-authorsMark Masia, Mark Stewart
2011Lawrence SJ, Page AW, 'MASONRY STRUCTURES STANDARD AS3700-2011: AN OVERVIEW', PROCEEDINGS OF THE 9TH AUSTRALASIAN MASONRY CONFERENCE, Univ Auckland, Queenstown, NEW ZEALAND (2011)
Author URL
Co-authorsAdrian Page
2008Lawrence S, Page AW, 'New Australian standards for masonry in small structures', Proceedings of the 14th International Brick & Block Masonry Conference, Sydney, NSW (2008) [E1]
Co-authorsAdrian Page
2008Lawrence S, Testone T, Sugo HO, Page AW, 'An investigation of factors affecting the durability of masonry mortar', Proceedings of the 14th International Brick & Block Masonry Conference, Sydney, NSW (2008) [E1]
Co-authorsAdrian Page, Heber Sugo
2008Simundic G, Sugo HO, Page AW, Lawrence S, 'Preliminary assessment of correlation between mortar hardness and brick masonry strength', On Site Assessment of Concrete, Masonry and Timber Structures SACoMaTiS 2008: Proceedings of the First International RILEM Symposium, Varenna, Italy (2008) [E2]
Co-authorsHeber Sugo, Adrian Page, Goran Simundic
2006Han Y, Masia MJ, Lawrence S, Page AW, 'Experimental study of four brick unit specimens subjected to bending', 7th International Masonry Conference, London, UK (2006) [E1]
Co-authorsMark Masia, Adrian Page
2005Han Y, Masia MJ, Lawrence S, Page AW, 'Preliminary Finite Element Modelling Of Four Brick Unit Specimens Subjected To Bending', 10th Canadian Masonry Symposium, Banff, Canada (2005) [E1]
Co-authorsMark Masia, Adrian Page
2005Lawrence S, Sugo HO, Page AW, 'Masonry Bond Strength And The Effects Of Supplementary Cementitious Materials', Australian Stuctural Engineering Conference : ASEC 2005 : 11-14 September 2005, Newcastle City Hall, Newcastle, NSW, Australia. Program & abstract book, Newcastle, Australia (2005) [E1]
Co-authorsAdrian Page, Heber Sugo
2005Lawrence S, Willis CR, Griffith MC, 'Further Developments In The Design Of Masonry Walls In Bending', Australian Stuctural Engineering Conference : ASEC 2005 : 11-14 September 2005, Newcastle City Hall, Newcastle, NSW, Australia. Program & abstract book, Newcastle, Australia (2005) [E1]
2004Page AW, Sugo HO, Lawrence S, 'The Influence Of Cement Type, Age And Curing Conditions On Masonry Bond Strength', Proceedings of the 7th Australasian Masonry Conference, Newcastle, Australia (2004) [E1]
Co-authorsHeber Sugo, Adrian Page
2004Testone T, Sugo HO, Page AW, Lawrence S, 'A Study On Factors Affecting Mortar Durability Using The Scratch Test - Preliminary Results', Proceedings of the 7th Australasian Masonry Conference, Newcastle, Australia (2004) [E1]
Co-authorsAdrian Page, Heber Sugo
2004Masia MJ, Han Y, Lawrence S, Page AW, 'An Experimental Study Of Brick Masonry Specimens Subjected To Biaxial Bending', Proceedings of the 13th International Brick/Block Masonry Conference, Amsterdam (2004) [E1]
Co-authorsMark Masia, Adrian Page
2004Testone T, Sugo HO, Page AW, Lawrence S, 'A Study Of Mortar Durability Using The Scratch Test', Proceedings of the 13th Internatonal Brick/Block Masonry Conference, Amsterdam (2004) [E1]
Co-authorsHeber Sugo, Adrian Page
2004Bosiljkov VB, Sugo HO, Page AW, Lawrence S, 'The Influence Of Cement Replacement Materials On The Flexural Bond Strength Of Masonry', Proceedings of the 13th Internatonal Brick/Block Masonry Conference, Amsterdam (2004) [E1]
Co-authorsHeber Sugo, Adrian Page
2003Page AW, Sugo HO, Lawrence S, 'The Influence Of Blended Cements On Masonry Bond Strength - An Ongoing Study', Proceedings of the International Conference On Performance Of Construction Materials In The New Millenium (ICPCM), Cairo, Egypt (2003) [E1]
Co-authorsHeber Sugo, Adrian Page
2001Sugo HO, Page AW, Lawrence S, 'The Influence of Air Entraining Agent on Bond Strength and Mortar Microstructure', Proceedings of the 6th Australasian Masonry Conference, Adelaide (2001) [E1]
Co-authorsHeber Sugo, Adrian Page
2001Sugo HO, Page AW, Lawrence S, 'The Development of Mortar/Unit Bond', Proceedings of the 6th Australasian Masonry Conference, Adelaide (2001) [E1]
Co-authorsHeber Sugo, Adrian Page
2001Sugo HO, Page AW, Lawrence S, 'Small-scale Direct Tension Test for the Determination of Bond Strength and Mortar Microstructure in Masonry', Proceedings of the International Rilem Workshop on Site Control and Non Destructive Evaluation of Masonry - Structures and Material, Milan (2001) [E2]
Co-authorsHeber Sugo, Adrian Page
1999Sugo HO, Page AW, Lawrence S, 'Improving the bond strength of mortars overdosed with air entraining agents', Proceedings the Eighth North American Masonry Conference, Austin, Texas, USA (1999) [E1]
Co-authorsHeber Sugo, Adrian Page
Show 16 more conferences
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Grants and Funding

Summary

Number of grants2
Total funding$107,940

Click on a grant title below to expand the full details for that specific grant.


20062 grants / $107,940

Stochastic Modelling of Strength and Reliability of Masonry Walls Loaded in Flexure and Compression$77,940

Funding body: ARC (Australian Research Council)

Funding bodyARC (Australian Research Council)
Project TeamProfessor Mark Stewart, Associate Professor Mark Masia, Emeritus Professor Adrian Page, Conjoint Professor Stephen Lawrence
SchemeLinkage Projects
RoleInvestigator
Funding Start2006
Funding Finish2006
GNoG0186013
Type Of FundingAust Competitive - Commonwealth
Category1CS
UONY

Stochastic Modelling of Strength and Reliability of Masonry Walls Loaded in Flexure and Compression$30,000

Funding body: Clay Brick and Paver Institute

Funding bodyClay Brick and Paver Institute
Project TeamProfessor Mark Stewart, Associate Professor Mark Masia, Conjoint Professor Stephen Lawrence, Emeritus Professor Adrian Page
SchemeLinkage Projects Partner funding
RoleInvestigator
Funding Start2006
Funding Finish2006
GNoG0186954
Type Of FundingContract - Aust Non Government
Category3AFC
UONY
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Research Supervision

Past Supervision

YearResearch Title / Program / Supervisor Type
2010Variability of Unit Flexural Bond Strength and its Effect on Strength in Clay Brick Unreinforced Masonry Walls Subject to Vertical Bending
Civil Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
2008A Study of Two-Way Bending in Unreinforced Masonry
Civil Engineering, Faculty of Engineering and Built Environment
Co-Supervisor
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Conjoint Professor Stephen Lawrence

Position

Conjoint Professor
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

Emailstephen.lawrence@newcastle.edu.au
Phone(02) 9810 8263
Fax(02) 9555 5155

Office

LocationCallaghan
University Drive
Callaghan, NSW 2308
Australia
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