الفهرس 
Statement of the problem
EVALUATION OF TEST RESULTSOnly 14 pages are availabe for public view
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Abstract
The beam-column joint is representing the connection between columns and beam where several straining actions exist. A joint is a critical localized point in a structure where high moments and shears occur. There are various types of joints in a structure such as a corner, exterior, and interior joints. In the last few decades, earthquakes of many magnitudes have struck in different countries of the world which caused severe damage to reinforced concrete structures and many RC structures poorly behaved due to beam-column joint failure. Shear failure of the beam-column joint is not accepted due to its brittle nature. In this study, testing of the external type of joint having concrete grades different than that of the attached column or beam will be conducted to study its effect on the response of joint under simulated lateral loading.
Experimental work was conducted to study the general deformational behavior of ultra-high and medium strength concrete beam-column connections. Eight medium-scale connections, all specimens with an overall length of column 1500 mm. and length of beam 900 mm. cross-section of column (150 x 250 mm.) and cross-section of a beam (150 x 300 mm.) were tested under cyclic load. The main variables of this study were the characteristics strength of concrete, column axial load and change the shape of stirrups in the joint region. The results of this experimental work formulate some recommendations for designers and researchers concerning the analysis, design and construction of ultra-high-strength concrete connections. The observed
the behavior of the ultra-high-strength concrete specimens up to failure greatly encourages the use of ultra-high-strength concrete in connections.
The program was designed to clarify the effect of key variables such as the concrete compressive strength, the joint transverse reinforcement, the joint shear stress, and the axial column load. The test results were analyzed and demonstrate the effect these variables on the strength, stiffness, ductility, and energy dissipation capacity of seismic-resistant UHSC exterior joints.