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Structural Engineering and Mechanics
  Volume 68, Number 3, November10 2018 , pages 277-287

Investigation of the performance of externally collared RC short columns via aspect ratio
Tamer Dirikgil and Oguz Dugenci

    This paper presents the experimental study of nine pieces of reinforced concrete (RC) short columns. RC short columns were tested with cyclic loading with displacement control under the influence of constant axial load with load index of 0.2. Three columns within the tested nine columns are reference columns which have the details of the reinforcement given in the modern regulations and six of them are 150 mm and 100 mm externally collared columns. In addition to the parameter of the collar spacing, aspect ratio (as=2-1.5-1) is also considered as a parameter. The data obtained from experimental results have shown that externally collar contributes significantly to increasing the shear resistance of RC short columns and limiting the shear dominant behavior. It has been observed that the effectiveness of the externally collar increases with the decrease of the aspect ratio.
Key Words
    RC short column; aspect ratio; collar; cyclic loading; stiffness; ductility; energy dissipation
Tamer Dirikgil and Oguz Dugenci: Department of Civil Engineering, Erciyes University, 38280 Talas, Kayseri, Turkey

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