The Behavior of Concrete Columns with Interlocking Spirals

Abstract

The objective of this study is experimentally to investigate the strength and the deformability of specimens with interlocking spirals subjected to concentric axial loads. For this purpose, experimental study were conducted for 36 specimens with single spirals and 108 specimens with interlocking spirals. Main test variables were concrete strength, spacing of spirals, yield strength of spirals, and interlocking length of spirals. From test results, the strength and the deformation characteristics were reported. Based on test results, model equations for prediction of the strength and the axial strain at the peak stress of specimens with interlocking spirals were proposed. (C) 1999 Elsevier Science Ltd. All rights reserved.