Abstract
The cyclic tests of the columns are of practical relevance to the performance of compression
members during earthquake loading. The strength, ductility and energy absorption capabilities of RC
columns, subjected to cyclic loading, have been estimated by many researchers. These characteristics
are not normally inherent in plain concrete but can be achieved by effectively confining columns
through transverse reinforcement. An extensive experimental program, in which performance of four
RC columns detailed according to provisions of ACI-318-08, was studied in comparison with that of
four columns confined by a new proposed technique. Out of total eight, this paper presents
performance of three columns which were detailed according to provision of ACI-318-08 and cast
with 25 and 32 MPa concrete. The experimentally achieved load-displacement hysteresis and
backbone curves of the three columns are presented. Two approaches, which utilize moment-curvature
and shear-shear strain relationship of RC columns achieved through Response-2000, have been
suggested to draw analytical load-displacement curves of the columns. The experimental and
analytical load-displacement curves are found in good agreement. The suggested analytical technique
is simple and easy to implement. The technique will be available to the engineers involved in design to
estimate capacity of RC columns.
M. Rizwan, M. T. A, Chaudhary, M. Ilyas. (2014) Analytical Load Displacement Curves of RC Columns under Constant Axial and Cyclic Lateral Loads, Pakistan Journal of Engineering and Applied Sciences, VOLUME 15, Issue 1.
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