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TECHNICAL PAPER

SEISMIC PERFORMANCE

EVALUATION OF FRAMED

RC BUILDING WITH AND MADHESWARAN C. K.*,

WITHOUT DUCTILE DETAILING GOPALAKRISHNAN N.,
PRAKASHVEL J.,
SATHISHKUMAR K.

Abstract 2. REVIEW OF LITERATURE

Two three-storey half-scale Reinforced Concrete(RC) building, Santhi et al., carried out studies on the seismic performance
[1]
are designed and constructed to study its seismic response of reinforced concrete frames designed for gravity loads. The
characteristics. First framed RC building is designed without parameters under investigation are acceleration, displacement,
ductile detailing. Second building is designed with ductile shear force, interstory drift, stiffness are studied and effect of
detailing as per IS13920 code. Experimental studies are carried masonry infill on the seismic performance of reinforced concrete
out using the 4m × 4m tri-axial shake-table facility to evaluate frames is evaluated. Severe damaged is observed in columns
the seismic performance of RC building without and with ductile in the ground floors. The damaged columns are strengthened
detailing. The seismic performance of the ductile detailing over by reinforced concrete jacket and the frames are tested for
the non-ductile detailing is studied. The earthquake excitation earthquake excitations. The retrofitted frames could sustain low
is given for both cases. All the displacements, acceleration to medium seismic forces due to increase in stiffness. Arslan
and strain responses are measured along the direction of table et al. investigated the failure modes on reinforced concrete
[2]
excitation. Failure behaviour of the both RC buildings are frames caused during recent earthquakes in Turkey. The different
presented. failure modes observed were poor detailing practices, strong
beam - weak column, soft and weak storey, punching failure
Keywords: Reinforced concrete building, Bare frame, in flat plate construction, poor quality of materials, foundation
Earthquake time history, seismic performance, ductile detailing, failure and damage due to earthquake-induced liquefaction.
shake table test
The seismic performance of a half-scale three storey reinforced
1. INTRODUCTION concrete building with and without ductile detailing is studied.
Experimental studies are carried out using 4m x 4m shake table.
Northridge 1994, Kobe 1995, Kocaely earthquake 1999 in Turkey The validation tests have been carried on shake tables, where
and Bhuj earthquake (2001) in India have demonstrated the earthquakes of varying peak ground acceleration (PGA) levels
potential hazard associated with structural damage of reinforced have been applied to a model RC frame and the responses of
concrete buildings. Large number of open ground storey models have been measured. Drift, acceleration, displacements,
reinforced concrete buildings in Bhuj, Gandhidham, suffered strain , natural frequencies and mode shapes have been studied
severe damage or collapse. Among those that did not collapse, in detail. Finite element modelling of Reinforced concrete
the damage was confined mostly to the open ground storey building with and without ductile detailing are carried out. The
columns. As a result, almost the entire lateral deformation is comparison of natural frequencies and mode shapes are carried
concentrated in the ground storey columns, and the upper out. The failure cracks patterns of Reinforced concrete building
stories moved laterally as a rigid block. The reinforced concrete are obtained.
columns at the bottom storey have suffered the maximum
damage and the brick in-fill at the top stories has developed The Non-ductile RC framed buildings have incurred significant
sliding cum separation failure. These buildings are normally not earthquake damage in the 1971 San Fernado, 1979 Imperial
designed with ductile detailing provisions as per earthquake valley, 1987 Whittier Narrows and 1994 North ridge earthquake
resistant design proposed in the Bureau of Indian Standard. in California, 1995 Kobe earthquake, 2001 Bhuj earthquake, 2005
Hence an attempt is made in this study to understand the Kashmir earthquake and 2015 Nepal earthquake (Liel A B et al.,
seismic performance of reinforced concrete building with and 2011) . It is very important to understand the seismic behaviour
[8]
without ductile detailing. of reinforced concrete building with and without ductile

THE INDIAN CONCRETE JOURNAL | AUGUST 2021 9
*Corresponding author : Madheswaran C. K., Email: ckm@serc.res.in