Title: Retrofitted Concrete Bridge Columns Under Shaketable Excitation

Author(s): Patrick N. Laplace, David H. Sanders, M. Saiid Saiidi, Bruce M. Douglas, and Saad El-Azazy

Publication: Structural Journal

Volume: 102

Issue: 4

Appears on pages(s): 622-628

Keywords: column; fibers; seismic

DOI: 10.14359/14567

Date: 7/1/2005

Abstract:
Three 1/3-scale circular flexure-dominated, retrofitted, reinforced concrete bridge columns were studied using the University of Nevada, Reno, seismic shaketable system. Two steel jacket retrofit and one carbon fiber retrofit columns were tested and compared to a previously studied as-built column. The steel jacket retrofit columns showed increased capacity and ductility over the as-built but were adversely affected by low level motion and variable load path. A significant increase in capacity and ductility was observed for the carbon fiber jacket retrofit. Simple time-history analytical models can predict the performance of the columns adequately, although lap splice degradation is not well predicted.