الفهرس 
CHAPTER (1): INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The joints between beams and columns are crucial zones in a reinforced concrete moment resisting frame. The behaviour of such joints greatly influences the strength and ductility of the overall structure. Many experimental tests of exterior RC beam-column joints under monotonic loading were carried out to assess the joint shear strength and to understand the behavior of joint. The objective of the present work is to model exterior beam-column joint subjected to monotonic loading using the finite element program ABAQUS 6.13. The main studied variables were axial load ratio, grade of concrete, number of joint ties and type of beam tension reinforcement anchorage. In this research, three-dimensional numerical models of exterior reinforced concrete beamcolumn joints were analyzed under monotonic beam tip loading using the finite element package ABAQUS 6.13. Concrete and reinforcing steel material nonlinearities, as well as bond characteristics between reinforcing bars and surrounding concrete, were considered in the analysis. A parametric study involving thirty joint models was performed to investigate the effect of concrete strength, column axial load, number of joint ties and shape of the beam tension reinforcement on the beam tip load and displacement capacities. The study showed that the beam tip ultimate load significantly increased by increasing the concrete strength, column axial load and number of joint ties. Joints with L-shaped beam tension reinforcing bars exhibited similar performance to those with U-shaped bars. The beam tension reinforcement with straight bars had the lowest beam tip load capacity.