Title:
Experimental Study of Concrete Columns Reinforced with Lap-Spliced Glass Fiber-Reinforced Polymer Bars under Seismic Load
Author(s):
Bahareh Nader Tehrani, Ahmed Sabry Farghaly, and Brahim Benmokrane
Publication:
Structural Journal
Volume:
121
Issue:
3
Appears on pages(s):
69-82
Keywords:
Bahareh Nader Tehrani, Ahmed Sabry Farghaly, and Brahim Benmokrane
DOI:
10.14359/51740460
Date:
5/1/2024
Abstract:
While reinforcing bar lap splicing is inevitable in reinforced
concrete (RC) structures, it critically affects structural behavior,
especially in structures subjected to seismic load. That notwithstanding, current North American design standards do not
provide any recommendations or equations for lap-spliced glass
fiber-reinforced polymer (GFRP) reinforcing bars under seismic
load. This study tested six full-scale RC columns measuring
1850 mm (73 in.) in height and 400 x 400 mm (16 x 16 in.) in cross
section under constant axial load and incremental reversed cyclic
lateral loading. Four columns were reinforced with GFRP bars,
and two were reinforced with steel bars for comparison. The test
parameters included lap-splice length and type of reinforcement.
The structural performance of the specimens was evaluated based
on the cracking behavior, failure mechanism, hysteretic response,
load-carrying capacity, dissipated energy, stiffness degradation,
and strain behavior. Afterward, available models in North American
design standards for the splice length of GFRP reinforcing
bars under monotonic loading were evaluated based on the experimental results. According to the results, providing adequate splice length can secure satisfactory structural performance in spliced GFRP-RC columns. The splice length determined based on the North American design standards for monotonic loading cannot,
however, be directly used to achieve the required drift capacity in
GFRP-RC columns under reversed cyclic lateral loading.