International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 04 | Apr -2017
e-ISSN: 2395 -0056
www.irjet.net
p-ISSN: 2395-0072
ANALYSIS OF SEISMIC BEHAVIOUR OF RCC AND COMPOSITE STRUCTURE WITH BUCKLING RESTRAINED BRACES Gopika P 1 ,Najma Ananthakumar2 1
PG Scholar, Dept. of Civil Engineering, SVNCE
2Asst.
Professor, Dept. of Civil Engineering, SVNCE
--------------------------------------------------------------------------------------------------------------------------complete truss action, they exhibit a symmetric loadAbstract-Buckling restrained braced frames (BRBFs) are one of the newer types of seismic force resisting
deformation
behaviour
(equal
systems used in modern building designs. BRBFs resist
compression
and
lateral loads as vertical trusses in which the axes of the
absorption capacity. They are basically made of two
members are aligned concentrically at the joints.
components, Yielding steel core and an encasing
Although the global geometric configuration of a BRBF
member. The former component takes the axial force
is very similar to a conventional concentrically braced
while the latter component restrains the brace from
frame (CBF), the members, connections, and behavior
buckling in compression. In particular, it is possible
of BRBFs are distinctly different from those of ordinary
to provide this mechanical behaviour enclosing a
concentrically braced frames (OCBFs) and special
ductile steel core (rectangular or cruciform plates,
concentrically braced frames (SCBFs). The key
circular rods, etc.) either in a continuous concrete
difference is the use and behavior of the Buckling
filled tube or within a continuous steel tube. In the
restrained brace (BRB) itself. This study focus on the
first case, the brace is called “unbonded” BRB,
analysis of seismic behavior of RCC and composite
because the surface between the core and the sleeve
structure with conventional and buckling restrained
is treated with unbonding materials to allow the
braces using ETABS software.
relative
tension)
displacement with
and
the
response large
in
energy
sleeve to be
developed. In the second case, the steel core is
INTRODUCTION
separated by the sleeve by a small gap and it is usually called only steel BRB. In both cases, the
Buckling-Restrained Braces (BRBs) are a relatively
assembly is detailed so that the yielding core can
recent development in the field of seismic resistant
deform
steel structures. BRBs can be considered as one of the
longitudinally
independent
from
mechanism that restrains lateral and local buckling.
most efficient structural system for resisting lateral forces due to earthquakes because (i) they provide © 2017, IRJET
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