Bassam A. Izzuddin
Professor of Computational Structural Mechanics
Department of Civil and Environmental Engineering
Imperial College London
Professor Bassam Izzuddin is Professor of Computational Structural Mechanics and
Head
of the Computational Structural Mechanics group in the Department of Civil and
Environmental Engineering at Imperial College London. He is the founder and
developer of ADAPTIC, an adaptive static and dynamic structural analysis program
for
high-fidelity modelling of steel, concrete, composite and masonry structures.
His
research focusses on modelling whole buildings and masonry arch bridges under
service and extreme loading conditions, such as due to earthquake, fire and
blast. A
key feature of his work has been extensive national and international
collaboration
with fellow academics and leading players in the structural engineering
industry,
leveraging ADAPTIC to set the international agenda on several fronts.
Furthermore,
he has made determined steps towards developing simplified design-oriented
assessment techniques, including pioneering work on structural robustness, and
proposing analogies which enhance the understanding by engineers of complex
nonlinear structural phenomena. With over 200 papers published in leading
international journals, Professor Izzuddin also serves as Co-Editor-in-Chief of
Engineering Structures, and he is Fellow of the Royal Academy of Engineering.
Abstract Title:
Hierarchic Domain Decomposition for Effective Damage Assessment of Large-Scale
Structures
Abstract Content:
High-fidelity damage assessment has potentially important applications in the
design and
retrofitting of civil engineering structures under service and extreme loading.
Yet,
despite huge advances in nonlinear structural analysis, empowered by
developments in
finite element analysis, constitutive modelling and damage mechanics, the
utilisation of
high-fidelity modelling for large-scale structures has been hampered by
excessive
computational demands in relation to both unrealistic run times and memory
bottlenecks.
This lecture presents recent developments undertaken by the author and his CSM
Research
Group at Imperial College London, which have been aimed at making high-fidelity
damage
assessment of real large-scale structural systems practicable. An advanced
hierarchic
domain decomposition method is described, which is shown to map directly onto
the
hierarchic nature of hardware resources in High Performance Computing systems,
and which
can effectively upgrade existing sequential finite element analysis programs
with
powerful parallel processing capabilities. This is supplemented with recent
developments
in macro- and meso-scale modelling of masonry structures, enabling the
prediction of
damage propagation in such structures, as well as phase-field modelling which is
more
generally applicable to other types of structure. Several applications of the
developed
capability, implemented within the nonlinear structural analysis program
ADAPTIC, are
presented to demonstrate the range of damage assessment problems that can be
addressed
effectively, with a particular focus on large-scale structural systems.