1 Professor and Head, Department of Civil Engineering, Government College of Engineering, Salem, TamilNadu, India
2 Research Scholar, Assistant Professor and Head, Department of Civil Engineering, Cape Institute of Technology, Levengipuram, Tirunelveli District, Tamil Nadu, India.
High Strength Concrete has become a very popular construction material which is directly related to recent development in concrete technology. The brittle nature of this High Strength Concrete results in sudden unpredictable failure. By using special hybrid fibre combinations of steel and polypropylene fibres, the explosive failure behaviour of High Strength Concrete (HSC) may be avoided. The main objective of this study is to investigate the effect of different proportions of hybrid fibre combinations (1.5% of steel fibre and 0 to 0.4% of polypropylene fibre) at the joint of exterior beam-column connections subjected to earthquake loading using M60 concrete. The hybrid fibre combinations of 1.5% of steel fibre and 0.2% of polypropylene fibre have best performance considering the strength, energy dissipation capacity and ductility factor. An attempt has been made to develop a new model by slightly modifying the previous models available in the literature for the joint shear strength. The proposed model was found to compare satisfactorily with the test results.
High strength concrete, hysteresis, hybrid, energy absorption, beam column joint
