Title:
Behavior of Reinforced Concrete Columns Confined by New Steel-Jacketing Method
Author(s):
Eunsoo Choi, Young-Soo Chung, Joonam Park, and Baik-Soon Cho
Publication:
Structural Journal
Volume:
107
Issue:
6
Appears on pages(s):
654-662
Keywords:
external pressure; grouting; reinforced concrete columns; seismic retrofit; steel jacket
DOI:
10.14359/51664013
Date:
11/1/2010
Abstract:
This paper introduces a new steel-jacketing method for reinforced concrete (RC) columns using external pressure. Experimental tests of concrete cylinders and RC columns are performed to assess the effectiveness of the proposed method. Single- and double-layered jackets are introduced. The newly jacketed cylinders show good results in terms of increasing the compressive strength and ductility compared to plain cylinders. The double-layered jackets are estimated to show equal performance to that of a single steel jacket having the same thickness as the double-layered jacket. Four columns are prepared and two of them are confined by steel jackets with external pressure; one is a single-layered jacket and the other is a double-layered jacket. The proposed steel-jacketing method increases the ductility of lap-spliced RC columns. The doublelayered jacketed column produces more ductile behavior than the single-layered jacketed column.