CYCLIC BEHAVIOR OF COMPOSITE COLUMN-REINFORCED CONCRETE BEAM JOINTS

Abstract

In this paper, behavior of the concrete encased steel profile composite column-reinforced concrete beam connection representing interior beam-to-column joints under cyclic loading is presented. The column was designed as concrete encased I steel profile composite column according to Eurocode 4; beam was designed as regular reinforced concrete beam according to local building codes. The finite element model of the beam-to-column joint was implemented in ABAQUS and numerical analysis was validated by full scale experimental study. The performance of the concrete encased steel profile composite column-reinforced concrete beam joint was compared to reinforced concrete beam-to-column joint, in order to observe the load carrying capacity and ductility. Ductility level and failure type of the joints were studied and performance of connections are compared. Comparisons were made using load-displacement relation and failure mechanism. It is found that the concrete encased steel composite column-reinforced concrete beam joint exhibited slightly ductile behavior relative to reinforced concrete column-beam joint. On the other hand, analysis result show that the failure controlled by behavior of the beam and joint capacity is depend on the shear capacity of the beam.