Seminar announcement: 26 December 2015 - Tokyo Polytechnic University,
Wind Engineering Center (1583, Iiyama, Atsugi, Kanagawa, 243-0297)
Overview
on blast resistance assessment of structures: finite element simulations and
fragility analyses
Pierluigi Olmati, Ph.D., P.E.
Researcher at Tokyo Polytechnic University (JSPS fellowship)
pierluigi.olmati@gmail.com
Researcher at Tokyo Polytechnic University (JSPS fellowship)
pierluigi.olmati@gmail.com
Abstract
An overview on
resistance assessment of structures subjected to impulsive loads is presented
in this seminar. Finite element simulations are carried out, mostly using
LS-Dyna©, for assessing the behavior of reinforced concrete and
insulated panels (sandwich panels) loaded by blast. Furthermore a probabilistic
framework, originally used in earthquake engineering, is applied to blast
engineering. The probability of failure assessed for a reinforced concrete
panel and a built-up blast resistant door is calculated using Monte Carlo
simulations (unconditional approach) and by means of fragility analyses (conditional
approach).
One of the presented
finite element analyses has been awarded in a simulation contest sponsored by
the USA National Science Foundation and American Concrete Institute. The
carried out finite element simulations predict with satisfying accuracy the
response of structures subjected to impulsive load. Therefore those modelling
techniques can be used to validate the design made by simplified analyses such
as the Single Degree of Freedom SDOF analysis.
The presented
probability approach for blast loaded structure is an innovative application of
the performance-based engineering to blast design. The proposed probabilistic
framework, to develop further, shows the feasibility to apply a probabilistic
design to blast loaded structure even using simplified mechanical models such
as the mentioned SDOF analysis. Furthermore a safety factor for blast design is
proposed as well.
Short
biography
Dr. Pierluigi Olmati obtained his Ph.D. degree
in Structural Engineering at Sapienza University of Rome (IT) in March 2014. During
his Ph.D. program he has been visiting scholar at Lehigh University (USA) and
National Technical University of Athens (GR). In 2014-15 he worked first as
researcher at University of Surrey (UK) and later as design engineer at AKT II
(structural engineering consultant, UK). In November 2015 Dr. Olmati has been
awarded with a fellowship of the Japan Society for the Promotion of Science and
he is hosted by Prof. Yukio Tamura and Prof. Akihito Yoshida at Tokyo
Polytechnic University - Wind Engineering Center. Research interests: numerical
and experimental evaluation of structures subjected to impulsive loads, probabilistic
frameworks applied to impulsive loaded structures.
