Nonseismic and seismic designed beam-column joints with rebar end anchors – Behaviour under reverse cyclic loading

ABSTRACT

In the present study, performance of the reinforced concrete beam column joints with two design criteria, i.e., gravity load design and ductile design is evaluated. Effect of detailing with bent reinforcement and with end anchors in joint region is studied using full scale experiments under reverse cyclic loading. The crack formation, load–displacement hysteresis behavior, energy dissipation, strength and stiffness degradation, etc. are studied. The plastic zone formation in beam region of the end anchor specimen is much wider and prominent than the bent reinforcement specimens. Both the ductile specimens provide almost same shear deformation and energy dissipation.

KEYWORDS:

• Beam–Column Joint
• Gravity Load Design
• Ductile Detailing
• Anchorage System
• Reverse Cyclic Loading
• Energy Dissipation
• Strength Degradation
• Plastic Zone
• Shear Deformation

Acknowledgments

Authors are also thankful to the scientists and technical staffs of Special and Multifunctional Structures Laboratory (SMSL) of CSIR-SERC who were involved in carrying out the experimental investigations.