FE modelling of RC frames with Link Column Frame System under in-plane loading

Abstract

The purpose of the link column frame is to provide acceptable collapse prevention performance and also easily repaired following a moderate earthquake. Linked column frame system (LCF) for steel structures was proposed by Peter Dusicka et.al (2009) with the objective of utilizing replaceable components that are strategically placed to protect the gravity load carrying system. In this paper the concept is extended to Reinforced concrete structures. The analytical studies were presented in this paper mainly focuses on the behavior of normal and link column RC frames with different connection configurations. Quasi-static cyclic load analytical results are presented and discussed for three 1:3 scaled RC frames with and without link column. Link column with various connections between the main beam and the link column i.e. rigid and hinged connection as per IS 12303-1987. With respect to experimental results, by using ANSYS software, the finite element model related to these frames is made and calibrated, and then analysis under cyclic static loading are performed. The test results showed a significant increase in the energy dissipation with a decrease in relative storey drifts for the link column frames with hinged connection. Greater amounts of energy were dissipated by the link column frame which has a hinge connection designed according to IS 12303-1987.