Imperial College London

ProfessorAhmedElghazouli

Faculty of EngineeringDepartment of Civil and Environmental Engineering

Professor of Structural Engineering - Section Head
 
 
 
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Contact

 

+44 (0)20 7594 6021a.elghazouli

 
 
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Assistant

 

Ms Ruth Bello +44 (0)20 7594 6040

 
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Location

 

440Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

259 results found

Bompa DV, Elghazouli AY, 2018, Seismic Performance and Application of Mechanical Splices in Dissipative RC Structures

REPORT

Bompa DV, Elghazouli AY, 2018, Ductility of Reinforced Concrete Members Incorporating Mechanical Splices, 16th European Conference on Earthquake Engineering (16ECEE)

CONFERENCE PAPER

Bravo-Haro M, Elghazouli AY, 2018, INFLUENCE OF GROUND MOTION DURATION ON THE SEISMIC RESPONSE OF STEEL MOMENT FRAMES, 16th European Conference on Earthquake Engineering (16ECEE)

CONFERENCE PAPER

Bravo-Haro MA, Elghazouli AY, 2018, Permanent seismic drifts in steel moment frames, JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol: 148, Pages: 589-610, ISSN: 0143-974X

JOURNAL ARTICLE

Bravo-Haro MA, Elghazouli AY, 2018, Influence of earthquake duration on the response of steel moment frames, Soil Dynamics and Earthquake Engineering, Vol: 115, Pages: 634-651, ISSN: 0267-7261

© 2018 Elsevier Ltd The influence of ground motion duration on the seismic response of steel moment frames is examined is this paper, with due consideration for cyclic degradation effects. A set of 77 spectrally equivalent pairs of short and long records is utilised in detailed nonlinear dynamic assessments in order to isolate the effects of ground motion duration. The influence of duration is firstly evaluated considering degrading and non-degrading idealised bilinear SDOF systems, for various levels of lateral strength representing practical ranges encountered in design. Subsequently, a sensitivity assessment focusing on the main parameters affecting the response of hysteretic degrading models is carried out through comparative incremental dynamic analysis. Whilst the effect of duration becomes more pronounced with the increase in lateral strength demands, particularly when approaching collapse, the cyclic degradation rate is shown to play a significant role even at lower levels typically associated with design. The performance of EC8-compliant frames indicates a higher probability of collapse when long-duration ground motion records are used, with a typical reduction of about 20% in the collapse capacity, in comparison with short-duration cases. The influence of duration is also examined through collapse capacity spectra, based on the seismic performance of 50 steel moment frames, which show that considerable reduction in the structural collapse capacity of structural systems occurs when relatively long duration records are adopted, for a wide range of dynamic characteristics. This becomes particularly evident in the case of buildings with relatively significant cyclic deterioration rates, where collapse capacity reductions up to 40% due to the influence of earthquake duration are obtained.

JOURNAL ARTICLE

Bravo-Haro MA, Tsitos A, Elghazouli AY, 2018, Drift and rotation demands in steel frames incorporating degradation effects, BULLETIN OF EARTHQUAKE ENGINEERING, Vol: 16, Pages: 4919-4950, ISSN: 1570-761X

JOURNAL ARTICLE

Elghazouli AY, Bompa DV, Xu B, Ruiz-Teran A, Stafford Pet al., 2018, Performance of Rubberised Reinforced Concrete Members under Cyclic Loading, 16th European Conference on Earthquake Engineering (16ECEE)

CONFERENCE PAPER

Elghazouli AY, Bompa DV, Xu B, Ruiz-Teran AM, Stafford PJet al., 2018, Performance of rubberised reinforced concrete members under cyclic loading, ENGINEERING STRUCTURES, Vol: 166, Pages: 526-545, ISSN: 0141-0296

JOURNAL ARTICLE

Goggins J, Broderick BM, Elghazouli AY, Salawdeh S, Hunt A, Mongabure P, English Jet al., 2018, Shake Table Testing of Concentrically Braced Steel Structures With Realistic Connection Details Subjected to Earthquakes, STRUCTURES, Vol: 13, Pages: 102-118, ISSN: 2352-0124

JOURNAL ARTICLE

Ho HC, Liu X, Chung KF, Elghazouli AY, Xiao Met al., 2018, Hysteretic behaviour of high strength S690 steel materials under low cycle high strain tests, ENGINEERING STRUCTURES, Vol: 165, Pages: 222-236, ISSN: 0141-0296

JOURNAL ARTICLE

Li Z, Liu Y, Huo J, Rong H, Chen J, Elghazouli AYet al., 2018, Experimental assessment of fire-exposed RC beam-column connections with varying reinforcement development lengths subjected to column removal, FIRE SAFETY JOURNAL, Vol: 99, Pages: 38-48, ISSN: 0379-7112

JOURNAL ARTICLE

Sirumbal-Zapata LF, Malaga-Chuquitaype C, Elghazouli AY, 2018, A three-dimensional plasticity-damage constitutive model for timber under cyclic loads, COMPUTERS & STRUCTURES, Vol: 195, Pages: 47-63, ISSN: 0045-7949

JOURNAL ARTICLE

Tsitos A, Bravo-Haro MA, Elghazouli AY, 2018, Influence of deterioration modelling on the seismic response of steel moment frames designed to Eurocode 8, EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, Vol: 47, Pages: 356-376, ISSN: 0098-8847

JOURNAL ARTICLE

Bompa DV, Elghazouli AY, 2017, Punching shear strength of RC flat slabs provided with shear-heads at interior connections to steel columns, Pages: 823-831

© Springer International Publishing AG 2018. This paper investigates the structural performance of cruciform shear-head systems fully integrated in RC flat slabs at interior connections to steel columns. The test results from a series of six large scale members of which two were provided with headed shear studs, offer a direct evaluation of the full load-deformation behaviour of the specimens as well as the ultimate punching shear strength attained prior to failure at the critical slab perimeter outside the shear-head region. Particular focus is given to the influence of the shear-head and headed shear stud reinforcement to the member kinematics and failure characteristics. The experimental findings coupled with shear field analyses enable the development of analytical models that depict the rotational response and flexural strength as a function of the shear-head characteristics, and support the definition of a shear-head dependent control perimeter required for punching shear strength assessments. Additionally, analytical design expressions that adopt the fundamentals of Model Code 2010, which account for the characteristics of the shear-head system, are proposed and their results capture in a more realistic manner the shear-head influence on the punching shear strength of RC flat slabs in such hybrid configurations in comparison with strength predictions from current conventional RC design methods.

CONFERENCE PAPER

Bompa DV, Elghazouli AY, 2017, Numerical modelling and parametric assessment of hybrid flat slabs with steel shear heads, ENGINEERING STRUCTURES, Vol: 142, Pages: 67-83, ISSN: 0141-0296

JOURNAL ARTICLE

Bompa DV, Elghazouli AY, 2017, Bond-slip response of deformed bars in rubberised concrete, Construction and Building Materials, Vol: 154, Pages: 884-898, ISSN: 0950-0618

This paper is concerned with examining the complete bond-slip behaviour between deformed reinforcement bars and concrete incorporating rubber particles from recycled tyres as a partial replacement for mineral aggregates. An experimental study consisting of fifty-four pull-out tests on cylindrical rubberised and normal concrete specimens, in conjunction with two reinforcement sizes with short embedment lengths, is described. In addition to a detailed assessment of the full bond-slip relationship, the test results offer a direct interpretation of bond behaviour under practical levels of confinement and its influence on the failure modes. Particular emphasis is given to the characteristic bond behaviour of rubberised concrete in terms of maximum bond strength and splitting strength as well bond stiffness and slip parameters. The detailed test measurements and observations provided in this study enable the definition of key bond parameters depicting the interfacial behaviour between rubberised concrete and deformed bars. The findings also permit the development of modified approaches for reliable representation of the failure modes and bond capacities for the concrete materials considered in this investigation.

JOURNAL ARTICLE

Bompa DV, Elghazouli AY, 2017, Ultimate Behaviour and Design of Hybrid Flat Slabs with Steel Shear Heads, Eurosteel2017

CONFERENCE PAPER

Bompa DV, Elghazouli AY, 2017, Ductility considerations for mechanical reinforcement couplers, STRUCTURES, Vol: 12, Pages: 115-119, ISSN: 2352-0124

JOURNAL ARTICLE

Bompa DV, Elghazouli AY, Xu B, Stafford PJ, Ruiz-Teran AMet al., 2017, Experimental assessment and constitutive modelling of rubberised concrete materials, CONSTRUCTION AND BUILDING MATERIALS, Vol: 137, Pages: 246-260, ISSN: 0950-0618

JOURNAL ARTICLE

Bravo-Haro M, Tsitos A, Elghazouli AY, 2017, Influence of Deterioration Modelling on Local Deformation Demands in Steel Moment Frames, Eurosteel2017

CONFERENCE PAPER

Bravo-Haro MA, Tsitos A, Elghazouli AY, 2017, Influence of cyclic degradation on inelastic seismic demands in steel moment frames, 16th World Conference on Earthquake Engineering, Pages: paper No 1033-paper No 1033

CONFERENCE PAPER

Cedron F, Elghazouli AY, 2017, Seismic Behaviour of Single Layer Cylindrical Lattice Steel Shells, Eurosteel2017

CONFERENCE PAPER

Elghazouli AY, 2017, Seismic Design of Buildings to Eurocode 8 - Second Edition, London and New York, Publisher: Spon Press - Taylor & Francis, ISBN: 9780415447621

BOOK

Elghazouli AY, 2017, Seismic design of building structures to Eurocode 8, CSCEHKB Conference, Pages: 62-69

CONFERENCE PAPER

Elghazouli AY, 2017, Seismic Performance of Structural Members Incorporating Recycled Rubber Materials, XVII ANIDIS Conference on Earthquake Engineering, Pages: KL25-KL33

CONFERENCE PAPER

Elghazouli AY, Bompa DV, Xu B, Stafford PJ, Ruiz-Teran AMet al., 2017, Inelastic behaviour of RC members incorporating high deformability concrete, Pages: 2399-2406

©Springer International Publishing AG 2018. This paper examines the inelastic behaviour of dissipative zones in structural members incorporating high deformability concrete materials in which mineral aggregates are partly replaced by rubber particles. An experimental study on three large-scale circular reinforced concrete column specimens, subjected to lateral cyclic displacements and co-existing axial loads, is described. The testing arrangement, specimen details, and main observations, are presented and discussed. The test results enable a direct assessment of the strength and ductility characteristics of the specimens. In particular, the study permits an evaluation of the comparative performance of structural members with and without rubber replacement, as well as the influence of external confinement. The results show that, in comparison with conventional reinforced concrete members, structural elements incorporating a significant proportion of aggregate replacement by rubber particles can offer a good balance between bending capacity and ductility, particularly for modest levels of co-existing axial loads. For column members required to sustain substantial gravity loads, favourable performance can be achieved in rubberised concrete members by means of strength enhancement through external confinement such as fibre reinforced sheets. Based on the experimental findings, the main material and response parameters are discussed and their influence on the overall structural behaviour are highlighted.

CONFERENCE PAPER

Elghazouli AY, Castro JM, 2017, Design of Steel Structures, Seismic Design of Buildings to Eurocode 8, Editors: Elghazouli, Pages: 157-192, ISBN: 9781498751599

BOOK CHAPTER

Elghazouli AY, Castro JM, 2017, Design of Composite Steel/Concrete Structures, Seismic Design of Buildings to Eurocode 8, Editors: Elghazouli, Pages: 193-212, ISBN: 978-1-4987-5159-9

BOOK CHAPTER

Karagiannis V, Malaga-Chuquitaype C, Elghazouli AY, 2017, Behaviour of hybrid timber beam-to-tubular steel column moment connections, ENGINEERING STRUCTURES, Vol: 131, Pages: 243-263, ISSN: 0141-0296

JOURNAL ARTICLE

Malaga Chuquitaype C, Elghazouli AY, 2017, Design of Timber Structures, Seismic Design Of Buildings To Eurocode 8, Editors: Elghazouli, Pages: 213-234

BOOK CHAPTER

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