Publications
355 results found
Cashell K, Elghazouli AY, Izzuddin BA, 2010, Influence of Reinforcement Properties on the Failure of Composite Slabs in Fire, Sixth International Conference on Structures in Fire, Sif10, Pages: 374-381
Nethercot DA, Stylianidis P, Izzuddin BA, et al., 2009, Enhancing the robustness of steel and composite buildings, Pages: 105-122
Methods intended for use in the design of steel and composite building frames covering the provision of adequate robustness so as to guard against progressive collapse are in the process of moving from prescriptive to quantitative. An approach that recognises all the important complex physical phenomena, employs a realistic criterion of failure and is capable of being implemented at a variety of levels has been devised at Imperial College London. Recent further development of this method has streamlined the necessary analyses, thereby making it possible to conduct parametric studies that provide insights into the link between changes to the structure and quantitative measures of resistance to progressive collapse. This approach is used herein to examine a number of different arrangements, from which key features of behaviour are identified. It has therefore been possible to isolate those structural modifications with the greatest potential for improving robustness and, moreover, to associate quantitative measures of that improvement with each scheme. Results for a series of arrangements, including several proposals put forward by Industry as methods of improving robustness based on the simple notion of increased tying capacity, are examined herein and general principles for improvement identified.
Omer E, Izzuddin BA, Elghazouli AY, 2009, Failure of Lightly Reinforced Slabs with Planar Edge Restraints under Fire, Journal of Structural Engineering, ASCE, Vol: 135, Pages: 1068-1080, ISSN: 0733-9445
Izzuddin BA, 2009, ADAPTIC User Manual, ADAPTIC User Manual, Imperial College London, Rev. 1.3b
Stylianidis PM, Nethercot DA, Izzuddin BA, et al., 2009, Progressive Collapse: Failure Criteria Used in Engineering Analysis, ASCE Structures Congress’09: Don’t Mess with Structural Engineers
Jahromi HZ, Izzuddin BA, Zdravkovic L, 2009, Iterative Coupling of Nonlinear Soil-Structure Interaction Using Reduced Order Method, International Conference on Computational Methods for Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2009
Izzuddin BA, 2009, Performance-Based Design of Multi-Storey Buildings Against Progressive Collapse (Invited Lecture), Joint Structural Division of HKIE & IStructE Annual Seminar on State-of-the-Art Performance Based Design Methods – Global Perspective and Overview
Izzuddin BA, 2009, Mitigation of Progressive Collapse in Multi-Storey Buildings, International Symposium on Advances in Steel and Composite Structures, ISASCS ’09
Macorini L, Izzuddin BA, 2009, An Interface Model for Multi-scale Nonlinear Analysis of Masonry Structure, 12th International Conference on Civil, Structural and Environmental Engineering Computing
Khan A, Lloyd Smith D, Izzuddin BA, 2009, Rigid-Plastic Beam under Impulsive Loading, 12th International Conference on Civil, Structural and Environmental Engineering Computing
Izzuddin BA, 2009, Recent Developments in Design-Oriented Assessment of Building Robustness (Invited Lecture), 12th International Conference on Civil, Structural and Environmental Engineering Computing
Pereira M, Izzuddin BA, 2009, Assessment of Progressive Collapse in Multi-Storey Buildings – Influence of Material Rate Sensitivity, 6th International Conference on Advances in Steel Structures, ICASS’09
Nethercot DA, Stylianidis PM, Izzuddin BA, et al., 2009, Enhancing the Robustness of Steel and Composite Buildings (Keynote Lecture), 6th International Conference on Advances in Steel Structures, ICASS’09
Cashell K, Elghazouli AY, Izzuddin BA, 2009, Failure Criteria for Composite Slabs Subject to Extreme Loading Conditions, 6th International Conference on Advances in Steel Structures, ICASS’09
Abela JM, Vollum RL, Izzuddin BA, et al., 2009, Blinding struts in upheaval buckling, 11th Annual International fib Symposium, Concrete: 21st Century Superhero, Publisher: Emaps Network
Zolghadr Jahromi H, Izzuddin BA, Zdravkovic L, 2009, A domain decomposition approach for coupled modelling of nonlinear soil–structure interaction, Computer Methods in Applied Mechanics and Engineering, Vol: 198, Pages: 2738-2749, ISSN: 1425-1655
Izzuddin BA, Nethercot DA, 2009, Design-Oriented Approaches for Progressive Collapse Assessment: Load-Factor vs Ductility-Centred Methods, ASCE Structures Congress’09: Don’t Mess with Structural Engineers
Khalid H, Izzuddin BA, 2009, Bond-Slip Modelling in Nonlinear Finite Element Analysis of Reinforced Concrete Structures, 17th UK Conference on Computational Mechanics (ACME-UK)
Elghazouli AY, Cashell KA, Izzuddin BA, 2009, Experimental evaluation of the mechanical properties of steel reinforcement at elevated temperature, Fire Safety Journal, Vol: 44, Pages: 909-919
Vlassis AG, Izzuddin BA, Elghazouli AY, et al., 2009, Progressive collapse of multi-storey buildings due to failed floor impact, Engineering Structures, Vol: 31, Pages: 1522-1534, ISSN: 0141-0296
Abela JM, Vollum RL, Izzuddin BA, et al., 2008, Upheaval buckling behaviour of blinding struts, Structural Engineering International: Journal of the International Association for Bridge and Structural Engineering (IABSE), Pages: 27-29, ISSN: 1016-8664
Zolghadr Jahromi H, Izzuddin BA, Zdravkovic L, 2008, Computational methods in Dirichlet-Neumann coupling of soil-structure interaction, Pages: 239-245
This paper presents domain decomposition methods for nonlinear analysis of soil-structure interaction problems, where particular emphasis is given to Dirichlet-Neumann iterative coupling methods. In this approach, the overall soil-structure domain is physically decomposed into independently modelled soil and structure sub-domains, and then the response of separately modelled sub-domains is coupled by successive updates of the boundary conditions, ensuring convergence to equilibrium and compatibility at the interface of the soil-structure coupled system. In this respect, the mathematical and computational characteristics of using constant relaxation, adaptive relaxation and condensed stiffness matrix of the partitioned sub-domains in coupling algorithms are discussed, including the convergence conditions and choice of algorithmic parameters. In view of the above, the use of a modified reduced order method, which utilises an efficient approximation of the condensed stiffness matrices at the soil-structure interface to ensure and accelerate convergence, is discussed and its merits are illustrated in a case study. © 2009 Taylor & Francis Group, London.
Li ZX, Izzuddin BA, Vu-Quoc L, 2008, A 9-node co-rotational quadrilateral shell element, Computational Mechanics, Vol: 42, Pages: 873-884
A new 9-node co-rotational curved quadrilateral shell element formulation is presented in this paper.Different from other existing co-rotational element formulations: (1) Additive rotational nodal variables are utilized in the present formulation, they are two well-chosen components of the mid-surface normal vector at each node, and are additive in an incremental solution procedure; (2) the internal force vector and the element tangent stiffness matrix are respectively the first derivative and the second derivative of the element strain energy with respect to the nodal variables, furthermore, all nodal variables are commutative in calculating the second derivatives, resulting in symmetric element tangent stiffness matrices in the local and global coordinate systems; (3) the element tangent stiffness matrix is updated using the total values of the nodal variables in an incremental solution procedure, making it advantageous for solving dynamic problems. Finally, several examples are solved to verify the reliability and computational efficiency of the proposed element formulation.
Favvata MJ, Izzuddin BA, Karayannis CG, 2008, Modelling exterior beam–column joints for seismic analysis of RC frame structures, Earthquake Engineering and Structural Dynamics, Vol: 37, Pages: 1527-1548
Vlassis AG, Izzuddin BA, Elghazouli AY, et al., 2008, Progressive collapse of multi-storey buildings due to sudden column loss—Part II: Application, Engineering Structures, Vol: 30, Pages: 1424-1438
Izzuddin BA, Vlassis AG, Elghazouli AY, et al., 2008, Progressive collapse of multi-storey buildings due to sudden column loss — Part I: Simplified assessment framework, Engineering Structures, Vol: 30, Pages: 1308-1318
Vollum RL, Afshar N, Izzuddin BA, 2008, Modelling short-term tension stiffening in tension members, Magazine of Concrete Research, Vol: 60, Pages: 291-300, ISSN: 0024-9831
Ramli Sulong NH, Elghazouli AY, Izzuddin BA, et al., 2008, Deformation Capacity and Ductility Demand of Steel Connections under Ambient and Elevated Temperatures, 5th European Conference on Steel and Composite Structures (Eurosteel 2008)
Izzuddin BA, 2008, Simplified Assessment of Structural Robustness for Sudden Component Failures (Invited Lecture), 1st Workshop on Robustness of Structures, COST Action TU0601
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