Smart Structures under Fires Following High Impact Loads

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15 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

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Smart Structures under Fires Following High Impact Loads

Yeesock Kim, Arsava Kemal Sarp


When
structures

are excited by high impact forces, key structural components of the
infrastructures can

be
se
verely

damage
d

and
cause a
shutdown

of critical life
-
safety
systems
.
However, it is challenging to develop an accurate explicit mathematical model of the
integrated structure
-
control systems due to complicated nonlinear behavior
of
systems and
uncer
tainties of high impact forces.
Another chal
lenge is
to investigate this complex dynamic
behavior under an additional
unexpected
load

case

such as fire.
The main purpose of
this
research is to investigate
effect of
fire
on the dynamic response of the structures and
design a
nonlinear control system

for complex structure under high impact loads.
In this context, small
scaled pre
-
stressed concrete members are going to be designed
and

set

of experimental studies

such as impact
loading and
furnace test will be performed.
As a first step,
one set of specime
ns

will be
exposed to two hour standard structural fire

in a furnace.
Data of the furna
ce test will
be used
to determine the parameters

that affect the dynamic behavior of structure such as
decrease in co
nstruction material properties
and surface damages
.
An
d as a next step,

high
impact loads will be applied
to analyze the nonlinear behavior
of burnt and unburnt specimens
and specimens
with and without
smart structural systems.
At the end of the study
it is
proposed to d
evelop a model for health

monitoring of
smart structures und
er high impact and
fire loads.
It is also aimed to d
emonstrate the effectiveness of the proposed control design
framework through the large
-
scale experiments of prestressed beam structures equipped with
magnetorheological (MR) da
mpers un
der high impact loads.