Professor Dennis Lam
- Title: Chair in Structural Engineering
- Email: D.Lam1@Bradford.ac.uk
- Extension: 4052
- Room No. Chesham C2.16
- Qualifications: BEng (Sheffield) MPhil (Sheffield) PhD (Nottingham) CEng, FIStructE, MICE, MASCE, MIMgt
- Additional Role: Director of Bradford Centre for Sustainable Environments
- Research Groups: Bradford Centre for Sustainable Environments
- Research Groups: Environmental and Infrastructure Engineering
Professor Dennis Lam is the Chair in Structural Engineering and the Director of Bradford Centre for Sustainable Environments. He is a Chartered Engineer, Fellow of the Institution of Structural Engineers and a Member of the Institution of Civil Engineers. He is the President of the Association for International Cooperation and Research in Steel - Concrete Composite Structures. He is also a member of the British Standard Institute B525/ and CEN/T250/SC4 committees responsible for the BS5950 and Eurocode 4. His main research interests are in the area of steel and composite structures, including the use of stainless steel, precast concrete and fibre reinforced polymers.
TCT Visiting Research Fellow, Nanyang Technological University, Singapore, 2001
JTCC Visiting Professor, Nanyang Technological University, Singapore, 2001
Visiting Senior Lecturer, University of New South Wales, Sydney, Australia, 2003
Royal Society Visiting Fellow, University of Wollongong, Australia, 2005
Visiting Professor, Hong Kong Polytechnic University, Hong Kong, 2008 -
Visiting Professor, University of Western Sydney, Australia, 2010
Visiting Professor, University of Leeds, Leeds, 2011
Royal Society Visiting Professor, Hong Kong Polytechnic University, Hong Kong, 2012
Tsinghua Special Chair Professor, Tsinghua University, China, 2013 -
European Editor-in-Chief of Steel and Composite Structures
Editorial Board Member for Journal of Constructional Steel Research
Editorial Board Member for Structures
Editorial Board Member for International Journal of Steel Structures
Editorial Board Member for Journal of Advanced Steel Construction
Editorial Board Member for Journal of Progress in Steel Building Structures
Editorial Board Member for The Open Civil Engineering Journal
Editorial Board Member for The Scientific World Journal: Civil Engineering
Grant Reviewer for Awarding Bodies
Engineering and Physical Sciences Research Council (EPSRC)
The Institution of Structural Engineers
The Technology Foundation STW, Netherlands
Research Grants Council, Hong Kong
Chang Jiang Scholars Program, The Ministry of Education, China
Current, and significant recent, funded projects
REBUILD - Regenerative Buildings and products for a circular economy (EPSRC)
REBUILD proposes that materials are directly reused and remanufactured into new builds with minimal re-processing. The project proposes a new circular economy system to address key barriers in the current linear approaches to demolition and new building construction, and build capabilities and tools to create significant new value by the early adoption of novel technologies, high value remanufacture, new system arrangements and the scaling up good practices. The magnitude of the opportunity is considerable.
REBUILD starts the process of converting all current building at the end of their first life and future buildings into material and product banks allowing the retention of high value materials and products for future repeat reuse. The cost of transport and storage means that repair, remanufacture and reuse of products to be commercially successful will need to be regional/local scale. To create demand acceptance for re-used products REBUILD testing processes are designed to demonstrate industry standards of quality assurance of technical performance.
The project will quantify, measure and evaluate the magnitude of value creation and product re-use for different system configurations and scenarios against a Business as Usual (BAU) reference case. Continual interactions with the industrial stakeholder group, and through their networks the wider construction industry, will make sure that the direction of our project stays close to industrial needs and the outcomes of our research are communicated to the industry in the most effective way.
Structural and Fire Resistance of a Reusable Steel/Concrete Composite Floor System (EPSRC)
This project aims to develop a reusable composite floor system to be used in steel/concrete composite structures. It is important that this method of construction is developed as a mainstream structural engineering solution, rather than limited to very special conditions, so as to maximize the benefits of design and construction of reusable structural components at the end of life.
The proposed reusable floor system is a totally different form of construction, with new modes of structural behaviour that have not been investigated before. A complete rethink of composite floor structural and fire engineering design is necessary to ensure safety of the proposed floor system. Extensive new physical tests at ambient and elevated temperatures and in fire for the different components of the proposed floor system have been planned to identify the different modes of behaviour and failure of the system. Supplemented by extensive numerical simulations, this project will develop thorough understanding of the structural and fire performance of the new structural system to develop practical design methods. This project will be carried out in collaboration between the Universities of Bradford and Manchester, which have international leading experiences in composite structural behaviour and design at ambient temperature and in fire, and have dedicated and experienced research teams and experimental facilities.
Reuse and Demountability using Steel Structures and the Circular Economy (RFCS)
The project will provide methodologies, tools and guidance to assist in design for deconstruction, particularly of composite steel structures for multi-storey buildings. This will lead to new shear connection systems for demountable composite construction, based on push tests and beam tests to verify composite action and to develop design rules.
The whole life benefits of reusable structures will be quantified using LCA and circular economy indicators. Opportunities for greater standardisation and the use of BIM will be explored to facilitate deconstruction. A demonstration of demountability of the developed system is planned.
Slim-Floor Beams - Preparation of Application rules in view of improved safety, functionality and LCA (RFCS)
The aim is to increase the competitiveness of steel in buildings by developing an integral and holistic approach for the application of flooring systems with steel slim floor beams, regarding different technical aspects of these solutions as well as lifecycle assessment. By use of new and optimized shear connector systems, the application of the slim floor system will be optimized regarding the erection time and high efficiency as well as reduced input of materials which leads to beneficial effects for the LCA calculation. Concerning the technical quality general design rules for slim floor solutions will be developed. Currently the design approach is ruled by national application of single or manufacturer-specific slim floor solutions. With the development of integral rules, the application rules will be simplified and generalized for slim floor systems.
The project will be the first to address the requirements for design of composite slim floor beams and to provide a holistic design approach with planned composite action between the steel profile and the concrete slab, considering all aspects of the technical design. The planned design rules will be based on adaptation of the current design principles and rules of Eurocodes. However specific parametric tests on the structural behaviour will lead to new design rules regarding the specifications of slim floor beam solutions.
In addition to the design rules, recommendations and guidelines for practical application of slim floor systems will be developed.
Development of Improved Shear Connection Rules in Composite Beams (RFCS)
This project has the objective of developing more realistic and more economic shear connection rules for modern long span composite beams, particularly with deeper deck profiles, which can be adopted as future revisions to EN 1994-1-1. A related factor is the amount of transverse reinforcement that is needed to control longitudinal splitting along the line of shear connectors. Membrane effects in floor plates provide a confining effect which can reduce the required amount of reinforcement, particularly for primary beams, but this is not taken into account.
The objective is achieved by a test programme that is aimed at answering these practical questions in modern composite construction. The tests will be analysed by advanced numerical models, which will use realistic non–linear material properties, including the declining stress-strain relationship for concrete at high strain and the load –slip relationship of shear connectors. These models will be used to develop new shear connection rules for un-propped beams, highly asymmetric beams, cellular beams and deeper deck profiles not covered by EN1994-1-1.
Fellow of the Institution of Structural Engineers, UK
President of Association for International Cooperation and Research in Steel - Concrete Composite Structures (ASCCS) http://www.brad.ac.uk/research/rkt-centres/centre-for-sustainable-environments/associationforsteel-concretecompositestructures/
Member of European Committee on Standardisation on Eurocode 4 (CEN/TC 250/SC4) - responsible for Design of Composite Structures in Europe
British Standards Institute Committee Member (B/525/4)- responsible for Design of Composite Structures in the UK
International Advisory Committee Member for the Hong Kong Code of Practice for the Structural Use of Steel
Technical Committee Member on Composite Construction - American Society of Civil Engineers
SEI Committee on Progressive Collapse - American Society of Civil Engineers
1. Mr D Stephen, PhD, PTDF Scholarship, Nigeria, Prevention of progress collapse of steel structures subjected to blast loads.
2. Mr M.E. Mahroug, PHD, Flexural Behaviour of Continuous FRP Reinforced Concrete Slabs
3. Mr Munir M Mahgub, PHD, CFT columns with self-compacting concrete
4. Mr Naveed Rehman. Demountable shear connectors for composite structures
5. Miss Jie Yang, PhD, Joint behaviour of concrete filled elliptical hollow sections
6. Mr M. Khatab, PhD, Shear behaviour of self-compacting concrete.
7. Mr A. H. A. Q. Al Ajami, PhD, Punching shear in flat slabs reinforced by FRP
8. Miss J. Abdalhmid, PhD, Creep and shrinkage of self-compacting concrete
9. Mr A. Araba, PhD, Hybrid steel / composite reinforced concrete continuous beams
1. Lam, D., Ang, T.C. and Chiew, S.P. Structural Steelwork: Design to Limit State Theory, (3rd Edition), 360 pages, Elsevier, 2003, ISBN 0750659122
2. Lam, D., Ang, T.C. and Chiew, S.P. Çelik Yapιlar: Sιnιr Değer Teorisine Dönük Tasarιm, (Structural Steelwork: Design to Limit State Theory, Turkish translation), 336 pages, Bilesim Yayinevi, 2005, ISBN 9756410663
3. Lam, D. Steel Concrete Composite and Hybrid Structures, 803 pages, Research Publishing, 2009, ISBN 9789810830687
4. Lam, D., Ang, T.C. and Chiew, S.P. Structural Steelwork: Design to Limit State Theory, (4th Edition), 400 pages, Taylor and Francis, 2013.
1. Liu, Y.P., Lam, D. and Chan, S.L. ,Chapter VII - Case Studies for Second-Order (Direct) Analysis of Semi-Rigid Frames in Hong Kong, Semi-rigid Connections Handbook. Edited by Wai-Fah Chen, Norimitsu Kishi, and Masato Komuro, J. Ross Publishing, 2010, ISBN: 978-1-932159-99-8
Journal Publications (since 2014)
1. Mahroug, M.E.M. Ashour, A.F. and Lam, D. (2014), Experimental Response and Code Modelling of Continuous Concrete Slabs Reinforced with BFRP Bars, Composite structures; Vol. 107, pp. 664-674
2. Dai, X.H., Lam, D., Jamaluddin, N., and Ye, J. (2014), Numerical Analysis of Slender Elliptical Concrete Filled Columns under Axial Compression, Thin-Walled Structures, Vol 77(1), pp 26-35
3. Ren, Q. X., Han, L. H., Lam, D., and Hou, C. (2014), Experiments on special-shaped CFST stub columns under axial compression, Journal of Constructional Steel Research, Vol 98, pp. 123-133.
4. Pagoulatou, M., Sheehan, T., Dai, X.H. and Lam, D. (2014), Finite element analysis on the capacity of circular concrete-filled double-skin steel tubular (CFDST) stub columns, Engineering Structures, Vol. 72, pp. 102-112.
5. Lawson, M., Aggelopoulos, E. and Lam, D. (2014), Test on 15m Span Composite Cellular Beam, New Steel Construction, Vol. 22(3), pp. 28-31.
6. Ren, Q. X., Han, L. H., Lam, D., and Li, W. (2014), Tests on elliptical concrete-filled steel tubular (CFST) beams and slender columns, Journal of Constructional Steel Research, Vol 99, pp. 149-160.
7. Dai, X. and Lam, D. (2014), A Numerical Modelling Study on the Effect of Concrete Infilling and External Intumescent Coating to Fire-resistant Behaviour of Stub Elliptical Steel Hollow Sections, Journal of Advanced Steel Construction, Vol. 10(3), pp. 310-324.
8. Ren, Q. X., Hou, C., Lam, D., and Han L. H. (2014), Experiments on the bearing capacity of tapered concrete filled double skin steel tubular (CFDST) stub columns, Steel and Composite Structures.
9. Mahroug, M.E.M. Ashour, A.F. and Lam, D. (2014), Test of Continuous Concrete Slabs Reinforced with Carbon Reinforced Polymer Bars, Composites: Part B, Elsevier.
10. Sheehan, T., Chan, T.M. and Lam, D. (2015), Mid-length lateral deflection of cyclically-loaded braces, Steel and Composite Structures.
11. Dai, X.H., Lam, D and Saveri, E. (2015), Effect of Concrete Strength and Stud Collar Size to Shear Capacity of Demountable Shear Connectors, Journal of Structural Engineering, American Society of Civil Engineers.
12. Lam,D., Dai, X.H., Kuhlmann,U., Raichle, J. and Braun, M. (2015), 'Slim-floor construction - design for ultimate limit state', Steel Construction, Wiley.
13. J Yang, T Sheehan, XH Dai, D Lam, (2015), 'Experimental study of beam to concrete-filled elliptical steel tubular column connections', Thin-Walled Structures, Vol. 95, pp 16-23.
14. T Sheehan, X Dai, D Lam, E Aggelopoulos, M Lawson, R Obiala, (2016), 'Experimental study on long spanning composite cellular beam under flexure and shear', Journal of Constructional Steel Research 116, 40-54.
15. N Rehman, D Lam, X Dai, AF Ashour, (2016), 'Experimental study on demountable shear connectors in composite slabs with profiled decking', Journal of Constructional Steel Research 122, 178-189.
16. A Espinos, ML Romero, D Lam, (2016), 'Fire performance of innovative steel-concrete composite columns using high strength steels', Thin-Walled Structures 106, 113-128.
17. M Mahgub, A Ashour, D Lam and X Dai (2017), "Tests of self-compacting concrete filled elliptical steel tube columns". Thin-Walled Structures 110, p27-34.
18. Khatab, M.A.T., Ashour A.F., Sheehan T. and Lam D. (2017), "Tests of Reinforced Self-Compacting Concrete Continuous Deep Beams", Engineering Structures, Volume 131, pp. 264-274.
19. Wang, ZB, Tao Z., Han L.H., Uy, B., Lam, D and Kang W.H. (2017), "Strength, stiffness and ductility of concrete-filled steel columns under axial compression", Engineering Structures Volume 135, pp. 209-221.
20. Lawson M, Lam D, Aggelopoulos E, Nellinger, S (2017), "Serviceability performance of composite beams", Proceedings of the Institution of Civil Engineers: Structures and Buildings, Vol. 170 Issue 2, pp. 98-114.
21. Yang, J., Sheehan, T., Dai, X.H., and Lam, D. (2017), "Structural behaviour of beam to concrete-filled elliptical steel tubular column connections", Structures, Vol. 9, pp. 41-52
22. Mirza O., Mashiri F.R., Canuto C. and Lam, D. (2017), "Post fire behaviour of innovative shear connection for composite steel-concrete structures", Structures, Volume 9, pp. 147-156
23. Lam D., Dai X., Ashour, A.F., Rehman, N., (2017), "Recent research on composite beams with demountable shear connectors", Steel Construction - Design and Research, Vol. 10 (2), pp. 125-134
24. Rehman, N., Lam D., Dai X., Ashour, A.F. (2017), "Testing of composite beam with demountable shear connectors", Proceedings of the Institution of Civil Engineers: Structures and Buildings, Vol. 170, pp. 1-14