Applied Element Method as a Practical Tool for Progressive Collapse
Analysis of Structures
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Event Type:Webinar
Location: Online,USA
Date: April 22, 2008
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(Note: This broadcast is part of the NAFEMS vendor series that
allows various solutions providers the opportunity to deliver
technical information to the NAFEMS community. NAFEMS does not
endorse any vendor, but tries to provide an unbiased view of the
marketplace.)
One of the biggest deficiencies of most current structural design
codes is that they do not necessitate performing a progressive
collapse analysis of a building. The catastrophic result of this
deficiency is that many existing buildings may collapse totally or
partially due to the failure of just one column under the effect of
man-made or natural disasters. One of the sad examples is the
collapse of almost 40% of the Alfred P. Murrah Building at Oklahoma
City due to a terrorist attack that affected one of its columns.
Currently, design codes all over the world are being modified to
have mandatory checks of buildings against progressive collapse.
Simulation of progressive collapse of a structure is one of the
most complicated engineering tasks. Accurate analysis should
consider numerous factors, including nonlinear behavior of concrete
and steel, accurate failure criteria, automated criteria for
element separation, and collision between falling debris and other
structural elements.
The question which arises for many engineers is “Which
structural analysis tool can we use to study progressive
collapse?”
Applied Element Method is a new concept in structural analysis that
is designed mainly for engineers to do advanced analysis that is
usually done by scientists. Using the AEM, the progressive collapse
analysis can incorporate crack initiation and propagation, yield of
steel, buckling and post-buckling behavior of columns, element
separation, falling of debris, and collision between different
structural elements. The analysis can be completed in reasonable
time, with reliable accuracy and without any user intervention or
pre-conditioning to control the way the building should behave
under extreme loadings.
In this presentation:
- The topic of progressive collapse analysis of structure is
discussed
- The limitations of simplified and advanced FEM tools are presented
- The theoretical background of AEM is introduced
- Practical applications of AEM in the field of blast analysis and
progressive collapse are given
Agenda
Welcome & Introduction
Matthew Ladzinski, NAFEMS North America
Applied Element Method as a Practical Tool for Progressive Collapse
Analysis of
Structures
Hatem Tagel-Din, Applied Sciences Int, LLC
Q & A Session
Closing
Related Articles
Please feel free to download the following articles related to the
upcoming webinar:
- The Applied Element Method: The Ultimate Analysis of
Progressive Collapse
- Extreme Loading: Breaks Through Finite Element Barriers
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Dr. Hatem Tagel-Din. Chief Scientist of Applied Science
International, LLc, located at Raleigh, North Carolina, US. He is
the founder of the Applied Element Method upon which the computer
simulations for Structural Demolition is based. He got his Ph.D.
from the Disaster Mitigation Engineering Center, Tokyo University,
Japan on 1998. He has more than 40 published papers at
international journals and conferences. He has three academic
awards from the Japan Society for Civil Engineers. He is the
Project Manager for the Extreme Loading for Structures ®
software which is used to analyze structures under extreme loads,
progressive collapse and for demolition purposes.