Publications
355 results found
Izzuddin BA, Pereira MF, Kuhlmann U, et al., 2012, Application of Probabilistic Robustness Framework: Risk Assessment of Multi-Storey Buildings under Extreme Loading, STRUCTURAL ENGINEERING INTERNATIONAL, Vol: 22, Pages: 79-85, ISSN: 1016-8664
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- Citations: 6
Jahromi HZ, Izzuddin BA, Nethercot DA, et al., 2012, Robustness assessment of building structures under explosion, Buildings, Vol: 2, Pages: 497-518
Over the past decade, much research has focused on the behaviour of structures following the failure of a key structural component. Particular attention has been given to sudden column loss, though questions remain as to whether this event-independent scenario is relevant to actual extreme events such as explosion. Few studies have been conducted to assess the performance of floor slabs above a failed column, and the computational tools used have not been validated against experimental results. The research program presented in this paper investigates the adequacy of sudden column loss as an idealisation of local damage caused by realistic explosion events, and extends prior work by combining the development of accurate computational models with large-scale testing of a typical floor system in a prototypical steel-framed structure. The floor system consists of corrugated decking topped by a lightly reinforced concrete slab that is connected to the floor beams through shear studs. The design is consistent with typical building practices in the US. The first test has been completed, and subsequent tests are currently being planned. This paper addresses the importance of robustness design for localized damage and includes a detailed description regarding how the research program advances the current state of knowledge for assessing robustness of compositely constructed steel-framed buildings.
Cashell KA, Elghazouli AY, Izzuddin BA, 2012, Ductility of composite floor slabsunder idealised fire conditions, Proceedings of the Institution of Civil Engineers-Structures and Buildings, Vol: 165, Pages: 399-409
Fang C, Izzuddin BA, Obiala R, et al., 2012, Robustness of Multi-Storey Car parks under Vehicle Fire, Journal of Constructional Steel Research, Vol: 75, Pages: 72-84
Abela JM, Vollum RL, Izzuddin BA, et al., 2012, Blinding Struts under Long-Term Loading, Magazine of Concrete Research
The term ‘blinding’ is used to describe the thin layer of unreinforced over-site concrete which is used to protect the base of excavations during construction. Blinding is not generally considered as a structural element even though it clearly provides some temporary lateral support to the retaining walls of excavations. The authors have previously shown that that enhanced blinding can be used to prop retaining walls in cut-and-cover excavations during construction prior to the completion of the base slab. This paper describes a series of laboratory tests which the authors carried out to investigate the effect of concrete creep on the axial resistance of blinding struts. The tests show that blinding can creep to failure if the sustained load exceeds a critical value which depends on the imperfection amplitude and profile as well as the strut thickness. The test results are used to validate a numerical model which is subsequently used to carry out a series of parametric studies on full-scale blinding struts.
Izzuddin BA, Macorini L, 2011, Multiscale Modelling of Masonry Structures under Extreme Loading, COMPUTATIONAL PLASTICITY XI - Fundamentals and Applications, Publisher: International Center for Numerical Methods in Engineering (CIMNE), Pages: 210-220
Wang KQ, Fang C, Li GQ, et al., 2011, An Analytical Model for Evaluating Axial Boundary Stiffness of Steel Beam Restrained by Neighboring Floor Systems, INTERNATIONAL JOURNAL OF STEEL STRUCTURES, Vol: 11, Pages: 457-466, ISSN: 1598-2351
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- Citations: 3
Abela JM, Vollum RL, Izzuddin BA, et al., 2011, Blinding Struts – Part 1: Buckling Response, Engineering Structures, Pages: 2563-2572, ISSN: 0141-0296
The term ‘blinding’ is used to describe the thin layer of unreinforced over-site concrete which is used to protect the base of excavations from construction traffic and to provide a clean surface for the construction of the base slab. Blinding is not generally seen or exploited as a structural element even though it clearlyprovides some temporary lateral support to the retaining walls of cut-and-cover excavations. This paper shows that enhanced blinding can be used to prop retaining walls in cut-and-cover excavations during construction prior to the completion of the base slab. An experimental program is conducted on 1/4 scale specimens, which demonstrates that the failure load of blinding struts is governed by upheaval buckling,and which is employed for the validation of nonlinear finite element models. The main parameters governing the buckling load are shown to include: i) the amplitude of the geometrical imperfection, ii)the thickness of blinding, and iii) the eccentricity of the applied load with respect to the centroid of the strut.
Vollum RL, Izzuddin BA, Abela JM, et al., 2011, Blinding Struts – Part 2: Towards A Simplified Design Method, Engineering Structures, Pages: 2573-2583, ISSN: 0141-0296
The companion paper described how concrete blinding can be used to prop retaining walls in cut and cover excavations prior to the completion of the base slab. In addition, it was demonstrated that the behaviour of blinding struts can be accurately predicted with nonlinear finite element analysis (NLFEA) ifthe strut properties and ground profile are known. This paper presents a simple design-oriented analytical model which can be used for blinding struts as an alternative to NLFEA. The simplified model is shown to give comparable results to NLFEA and is attractive for design since it allows the effect of variationsin imperfection amplitude and length to be rapidly assessed. A case study is presented which illustrates the use of the method and demonstrates that relatively thin blinding struts can resist the maximum axial forces likely to be encountered in cut and cover excavations.
Li ZX, Liu YF, Izzuddin BA, et al., 2011, A stabilized co-rotational curved quadrilateral composite shell element, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Vol: 86, Pages: 975-999, ISSN: 0029-5981
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- Citations: 14
Macorini L, Izzuddin BA, 2011, A non-linear interface element for 3D mesoscale analysis of brick-masonry structures, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Vol: 85, ISSN: 0029-5981
Macorini L, Izzuddin BA, 2011, A non-linear interface element for 3D mesoscale analysis of brick-masonry structures, INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING, Vol: 85, Pages: 1584-1608, ISSN: 0029-5981
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- Citations: 124
Li ZX, Izzuddin BA, 2011, A mixed co-rotational curved quadrilateral shell element, International Journal of Structural Engineering, Vol: 2, Pages: 188-208, ISSN: 1758-7328
This paper presents a 9-node isoparametric formulation of degenerated curved shell element, which is based on a co-rotational framework. Within this framework, the local reference axes are easily defined by the two diagonal vectors generated by the four corner nodes in the current deformed configuration. Furthermore, vectorial rotational variables are utilised, which consist of the two smaller components of each nodal orientation vector, enabling additive and commutative rotational operations. The element strain energy is evaluated in the local co-rotational system using the Green strain, where the Hellinger-Reissner functional is employed with assumed strain tensors for the membrane and shear strain fields to alleviate the membrane/shear locking phenomena. By defining the equilibrium conditions in terms of the out-of-balance between the work-conjugate internal and external forces, symmetric element tangent stiffness matrices are achieved in both the local and global systems, thus leading to considerable computational benefits. Finally, several examples of elastic shells subject to large displacements are considered, which demonstrate favourable performance of the proposed finite element formulation. © 2011 Inderscience Enterprises Ltd.
Nethercot DA, Stylianidis P, Izzuddin BA, et al., 2011, Enhancing the Robustness of Steel and Composite Buildings, Advanced Steel Construction, Vol: 7, Pages: 64-85, ISSN: 1816-112X
Fang C, Izzuddin BA, Elghazouli AY, et al., 2011, Robustness of Steel-Composite Building Structures Subject to Localised Fire, Fire Safety Journal, Vol: 46, Pages: 348-363
Cashell KA, Elghazouli AY, Izzuddin BA, 2011, Failure Assessment of Lightly Reinforced FloorSlabs. I: Experimental Investigation, Journal of Structural Engineering, ASCE, Vol: 137, Pages: 977-988
Cashell KA, Elghazouli AY, Izzuddin BA, 2011, Failure Assessment of Lightly ReinforcedFloor Slabs. II: Analytical Studies, Journal of Structural Engineering, ASCE, Vol: 137, Pages: 989-1001
Macorini L, Izzuddin BA, 2011, Nonlinear Analysis of Masonry Structures usingMesoscale Partitioned Modelling, Civil-Comp Press
Jokhio GA, Izzuddin BA, 2011, Parallelisation of Nonlinear Structural Analysis using Dual Partition Super-Elements, 2nd International Conference on Parallel, Distributed, Grid and Cloud Computing for Engineering, Publisher: CIVIL COMP PRESS, ISSN: 1759-3433
Khalid H, Izzuddin BA, 2011, NONLINEAR ANALYSIS OF RC MEMBERS ACCOUNTING FOR BOND-SLIP, International Conference on Recent Advances in Nonlinear Models - Structural Concrete Applications (CoRAN), Publisher: UNIV COIMBRA, DEPT ENGENHARIA CIVIL, FAC CIENVIAS & TECNOLOGIA, Pages: 163-175
Yu H, Izzuddin BA, Zha X-X, 2010, PROGRESSIVE COLLAPSE OF STEEL-FRAMED BUILDINGS: INFLUENCE OF MODELLING APPROACH, ADVANCED STEEL CONSTRUCTION, Vol: 6, Pages: 932-948, ISSN: 1816-112X
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- Citations: 11
Omer E, Izzuddin BA, Elghazouli AY, 2010, Failure of Unrestrained Lightly Reinforced Concrete Slabs under Fire- Part II: Verification and Application, Engineering Structures, Vol: 32, Pages: 2647-2657
Omer E, Izzuddin BA, Elghazouli AY, 2010, Failure of Unrestrained Lightly Reinforced Concrete Slabs under Fire- Part I: Analytical Models, Engineering Structures, Vol: 32, Pages: 2631-2646, ISSN: 0141-0296
Izzuddin BA, 2010, Robustness by Design - Simplified Progressive Collapse Assessment of Building Structures, Stahlbau, Vol: 79, Pages: 556-564
Pargana JB, Lloyd Smith D, Izzuddin BA, 2010, Fully Integrated Design and Analysis of Tensioned Fabric Structures: Finite Elements and Case Studies, Engineering Structures, Vol: 32, Pages: 1054-1068
Gudmundsson GV, Izzuddin BA, 2010, The 'Sudden Column Loss Idealisation' for Disproportionate Collapse Assessment, The Structural Engineer, Vol: 88, Pages: 22-26
Sulong NHR, Elghazouli AY, Izzuddin BA, et al., 2010, Modelling of beam-to-column connections at elevated temperature using the component method, STEEL AND COMPOSITE STRUCTURES, Vol: 10, Pages: 23-43, ISSN: 1229-9367
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- Citations: 14
Cashell K, Elghazouli AY, Izzuddin BA, 2010, Ultimate Behavior of Idealized Composite Floor Elements at Ambient and Elevated Temperature, Fire technology, Vol: 46, Pages: 67-89
Cashell K, Elghazouli AY, Izzuddin BA, 2010, Ultimate Behaviour of Idealized Composite Floor Elements at Ambient and Elevated Temperature, Pages: 67-89
Cashell KA, Elghazouli AY, Izzuddin BA, 2010, Experimental and Analytical Assessment of Ductility in Lightly Reinforced Concrete Members, Engineering Structures, Vol: 32, Pages: 2729-2743
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