28-09-2012, 10:36 AM
A Comparative Study on Seismic Provisions Made in Indian and
International Building Codes for RC Buildings
1A Comparative.pdf (Size: 162.73 KB / Downloads: 81)
Abstract:
This study focuses on the comparison of the Indian Code (IS) and International
Building Codes (IBC) in relation to the seismic design and analysis of Ordinary RC momentresisting
frame (OMRF), Intermediate RC moment-resisting frame (IMRF) and Special RC
moment-resting frame (SMRF). The analytical results of the model buildings are then compared
and analyzed taking note of any significant differences. This study explores variations in the
results obtained using the two codes, particularly design base shear, lateral loads, drifts and area
of steel for structural members for all RC buildings in both the codes.
The discussion in this study will be confined to monolithically cast reinforced concrete
buildings. Specific provisions for design of seismic resistant reinforced members are presented in
detail. Provisions of Indian and International Buildings Codes are identified.
Target deflection of the building is achieved at a lower lateral force in SMRF IBC i.e, the
concept of lesser force and more deflection is followed. However in OMRF, IMRF and SMRF of
Indian Code lateral force applied in higher as a result the deflection on the top of the building
exceeds the target deflection. To keep the deflection within the permissible limits we then
increase the column and beam sizes to make the building stiffer and maintain deflection within
the permissible limits.
Introduction:
Earthquakes, Tsunamis,
Seiches, Landslides, Floods and Fires are
natural calamities causing severe damage
and sufferings to persons by collapsing the
structures, cutting off transport systems,
killing or trapping persons, animals etc.
Such natural disasters are challenges to the
progress of development. However, civil
engineers as designers have a major role to
play in minimizing the damages by proper
designing the structures or taking other
useful decisions. This includes
understanding the earthquakes, behavior of
the materials of construction and structures
and the extent to which structural engineers
make use of the knowledge in taking proper
decisions in designing the structures made of
reinforced concrete [14].
Results and Discussion:
The results are
presented in the form of comparison for base
shear, lateral loads, displacements, drifts,
bending moment and shear force for
structural members and percentage of steel
for structural members of OMRF, IMRF and
SMRF buildings of IS-1893-2002 with
OMRF, IMRF and SMRF buildings of IBC-
2006.
The results obtained for considering
RC building are presented for Equivalent
Static Analysis. The result includes OMRF,
IMRF and SMRF buildings of IS-1893-2002
with OMRF, IMRF and SMRF buildings of
IBC-2006. The analysis of the buildings is
performed using analytical software ETABS