Abstract
This paper describes the testing of three interior post-tensioned slab-column connections having rectangular columns with a column aspect ratio of 5 subjected to gravity and cyclic lateral loading. The effects of prestressing, column rectangularity, and unidirectional and bidirectional cyclic lateral loading were studied. The behavior of the connections in terms of strength, stiffness, drift capacity, and ductility was also investigated. It was found that the increase in shear strength due to prestressing for connections having rectangular columns is much smaller compared to those with circular/square columns. In addition, comparisons of the experimental results with predictions of ACI 318-11 (ACI Committee 318 2011) are also presented. EXPERIMENTAL PROGRAM
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