Title:
Effect of Column Size and Reinforcement Ratio on Shear Strength of Glass Fiber-Reinforced Polymer Reinforced Concrete Two-Way Slabs
Author(s):
Mohamed Hassan, Amir Fam, Brahim Benmokrane, and Emmanuel Ferrier
Publication:
Structural Journal
Volume:
114
Issue:
4
Appears on pages(s):
937-950
Keywords:
column size; design equation; fiber-reinforced polymer; glass fiber-reinforced polymer; punching; shear; slab; two-way
DOI:
10.14359/51689869
Date:
7/1/2017
Abstract:
In this paper, a new design model is proposed for estimating punching shear capacity of fiber-reinforced polymer (FRP)-reinforced two-way slabs without shear reinforcement. This model is based on the statistical analysis of 69 laboratory experiments from slabs subjected to shear only or a combination of shear and unbalanced moment. The database used was populated with results from 20 FRP reinforced concrete (RC) two-way slabs previously tested by the authors as well as from 49 FRP (RC) two-way slabs in the literature tested by others. The proposed equation was compared to other equations in design guides, revealing higher accuracy and narrower scatter. The average experimental-to-theoretical shearstrength ratio was 1.01 ± 0.12 under shear only, and 1.03 ± 0.16 under shear and unbalanced moment, with coefficients of variation of 12% and 16%, and coefficients of determination (R2) of 0.99 and 0.96, respectively. The proposed equation could be an alternative to the current punching shear equations in ACI 440.1R-15 and CSA S806-12 design codes.