Title: Ductility Enhancement of Moderately Confined Concrete Tied Columns with Hook-Clips

Author(s): Panitan Lukkunaprasit and Chadchart Sittipunt

Publication: Structural Journal

Volume: 100

Issue: 4

Appears on pages(s): 422-429

Keywords: ductility; hook; reinforced concrete.

DOI: 10.14359/12650

Date: 7/1/2003

Abstract:
An experimental investigation of the effectiveness of hook-clips in improving the performance of conventional 90-degree hook-ties and crossties in moderately confined reinforced concrete (RC) tied columns is described. The tie configurations provided in the five large-scale specimens tested included 90-degree hook-ties and crossties, with and without hook-clips, and 135-degree hook-ties. The columns were subjected to moderate levels of compression and cyclic lateral loads. The hook-clips were found to be effective in improving the performance of concrete columns confined with 90-degree hook-ties and crossties, resulting in the displacement ductility factor and energy dissipation capacity to be increased by approximately 85 and 400%, respectively.