Title:
Effective Moment of Inertia for Glass Fiber-Reinforced Polymer-Reinforced Concrete Beams
Author(s):
Joseph Robert Yost, Shawn P. Gross, and David W. Dinehart
Publication:
Structural Journal
Volume:
100
Issue:
6
Appears on pages(s):
732-739
Keywords:
deflection; glass fiber-reinforced polymer; stiffness.
DOI:
10.14359/12839
Date:
11/1/2003
Abstract:
Deflection behavior of concrete flexural members reinforced with glass fiber-reinforced polymer (GFRP) reinforcing bars is investigated. It is recognized that serviceability plays a significant role in the design of GFRP-reinforced concrete beams. Therefore, accurate modeling of flexural stiffness is critical and the effect of influencing parameters must be considered. This study accounts for variations in concrete strength fc¢, reinforcement density r , and shear span-depth ratio (av / d). Experimental results from 48 simply supported concrete beams reinforced with GFRP are compared with ACI Committee 440’s published deflection model. The ACI 440.1R model is found to overestimate the effective moment of inertia, and an appropriate modification is presented.