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

Code Description Percentage
090599 Civil Engineering not elsewhere classified 85
120299 Building not elsewhere classified 15
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Publications

For publications that are currently unpublished or in-press, details are shown in italics.


Book (3 outputs)

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

Journal article (12 outputs)

Year Citation Altmetrics Link
2014 Li 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.

DOI 10.1016/j.engstruct.2013.11.031
Citations Scopus - 1Web of Science - 2
Co-authors Mark Masia, Mark Stewart
2011 Lawrence S, Stewart MG, 'Model error and structural reliability for unreinforced masonry walls in vertical bending', Masonry International, 24 23-30 (2011) [C1]
Co-authors Mark Stewart
2011 Stewart MG, Lawrence S, 'When buildings are too safe', MATERIALS WORLD, 19 30-31 (2011) [O1]
Co-authors Mark Stewart
2009 Lawrence 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.

Citations Scopus - 1
2009 Lawrence 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-authors Mark Stewart
2008 Lawrence 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]
Citations Scopus - 1
2008 Lawrence 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-authors Adrian Page, Heber Sugo
2007 Sugo 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]
DOI 10.1139/L07-137
Citations Scopus - 3Web of Science - 2
Co-authors Adrian Page, Heber Sugo
2007 Stewart 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-authors Mark Stewart
2007 Lawrence S, 'The use of characteristic strengths in masonry design', Australian Journal of Structural Engineering, 7 225-237 (2007) [C1]
2006 Willis CR, Griffith MC, Lawrence S, 'Moment capacities of unreinforced masonry sections in bending', Australian Journal of Structural Engineering, 6 133-145 (2006) [C1]
2002 Stewart MG, Lawrence S, 'Structural Reliability of Masonry Walls in Flexure', Masonry International, Vol. 15, No. 2 48-52 (2002) [C1]
Co-authors Mark Stewart
Show 9 more journal articles

Conference (19 outputs)

Year Citation Altmetrics Link
2014 Masia 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-authors Mark Masia, Mark Stewart
2011 Lawrence SJ, Page AW, 'MASONRY STRUCTURES STANDARD AS3700-2011: AN OVERVIEW', PROCEEDINGS OF THE 9TH AUSTRALASIAN MASONRY CONFERENCE, Univ Auckland, Queenstown, NEW ZEALAND (2011)
Co-authors Adrian Page
2008 Lawrence 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-authors Adrian Page
2008 Lawrence 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-authors Adrian Page, Heber Sugo
2008 Simundic 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-authors Heber Sugo, Adrian Page, Goran Simundic
2006 Han 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-authors Mark Masia, Adrian Page
2005 Han 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-authors Mark Masia, Adrian Page
2005 Lawrence 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-authors Adrian Page, Heber Sugo
2005 Lawrence 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]
2004 Page 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-authors Heber Sugo, Adrian Page
2004 Testone 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-authors Adrian Page, Heber Sugo
2004 Masia 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-authors Mark Masia, Adrian Page
2004 Testone 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-authors Heber Sugo, Adrian Page
2004 Bosiljkov 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-authors Heber Sugo, Adrian Page
2003 Page 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-authors Heber Sugo, Adrian Page
2001 Sugo 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-authors Heber Sugo, Adrian Page
2001 Sugo HO, Page AW, Lawrence S, 'The Development of Mortar/Unit Bond', Proceedings of the 6th Australasian Masonry Conference, Adelaide (2001) [E1]
Co-authors Heber Sugo, Adrian Page
2001 Sugo 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-authors Heber Sugo, Adrian Page
1999 Sugo 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-authors Heber Sugo, Adrian Page
Show 16 more conferences
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Grants and Funding

Summary

Number of grants 2
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 body ARC (Australian Research Council)
Project Team Professor Mark Stewart, Associate Professor Mark Masia, Emeritus Professor Adrian Page, Conjoint Professor Stephen Lawrence
Scheme Linkage Projects
Role Investigator
Funding Start 2006
Funding Finish 2006
GNo G0186013
Type Of Funding Aust Competitive - Commonwealth
Category 1CS
UON Y

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

Funding body: Clay Brick and Paver Institute

Funding body Clay Brick and Paver Institute
Project Team Professor Mark Stewart, Associate Professor Mark Masia, Conjoint Professor Stephen Lawrence, Emeritus Professor Adrian Page
Scheme Linkage Projects Partner funding
Role Investigator
Funding Start 2006
Funding Finish 2006
GNo G0186954
Type Of Funding Contract - Aust Non Government
Category 3AFC
UON Y
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Research Supervision

Number of supervisions

Completed2
Current0

Past Supervision

Year Level of Study Research Title / Program / Supervisor Type
2010 Masters Variability 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, The University of Newcastle
Co-Supervisor
2008 PhD A Study of Two-Way Bending in Unreinforced Masonry
Civil Engineering, Faculty of Engineering and Built Environment, The University of Newcastle
Co-Supervisor
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Conjoint Professor Stephen Lawrence

Position

Conjoint Professor
School of Engineering
Faculty of Engineering and Built Environment

Contact Details

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

Office

Location Callaghan
University Drive
Callaghan, NSW 2308
Australia
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