Browsing by Author "Mohammadamin Azimi"

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    Seismic performance of continuous link reinforced concrete beam-column connections subjected to earthquake loading
    (Universiti Teknologi Malaysia, 2014) Mohammadamin Azimi
    Reinforced concrete (RC) moment resisting frames, which typically consist of a framework o f beams and columns, are among the most commonly used lateral load resisting systems Earthquake events demonstrated that the beam-column joint in such a system is the weakest component under lateral load In this study, the exterior beam-column joint performance made with new proposed shear reinforcement patterns was investigated under seismic loading simulated by quasistatic cyclic loading experimentally and numerically for all ductility classes: low, medium and high The overall objectives o f this study were to evaluate ductility and energy dissipation capacity for two effective shear reinforcement systems for RC joints in all ductility classes and to investigate the new proposed shear reinforcement patterns performance in joints, experimentally and numerically. Nine full scale exterior beam-column joints were first designed in conformance with Eurocode (EC2-EC8) and then tested by lateral quasi-static cyclic loading recommended by ACI Building Code This study has developed two new shear reinforcement systems named single rectangular spiral reinforcement and double twisted opposing rectangular spiral continuous shear resistant system replacing the conventional discontinuous shear resistant system. A numerical study was also conducted to predict the general performance of joints through constructing a finite element model using ANSYS-software These types of shear reinforcing pattern can be employed where high resistance to lateral loads is needed or when ductile performance with high level o f energy absorption is required Both the experimental and finite element results showed that double twisted opposing rectangular continuous spiral and single rectangular continuous spiral reinforcement joints have successfully shown better ductile behaviour in comparison with common closed stirrups joints in all ductility classes It can be concluded that by changing the conventional shear reinforcement with the proposed continuous patterns will not only enhances the lateral strength and ductility performance, but also improves the ability of the joint to dissipate seismic energy