Thickness of Glass Fiber-Reinforced Polymer-Reinforced Concrete Slabs

This paper proposes a relationship between the minimum thick-ness of glass fiber-reinforced polymer-reinforced concrete (GFRP-RC) solid non-prestressed one-way slabs and clear span. In total, 68 slabs were analyzed and designed using ACI CODE-440.11-22 addressing strength, serviceability, and detailing criteria. Slabs were analyzed with four end conditions: simply supported, one-end continuous, both-ends continuous, and cantilever. Based on the analysis and design, a relationship similar to the one given in ACI 318-19, Table 7.3.1.1, was proposed to provide designers with a way to avoid tedious calculations for the deflection of GFRP-RC slabs. It was observed that, irrespective of using maximum or minimum reinforcement limits, minimum slab thickness values were always lower for GFRP-RC slabs than conventional steel-RC slabs. Hence, using Table 7.3.1.1 in ACI 318-19 for the calculation of minimum slab thickness of GFRP-RC slabs will be conservative when the concrete strength is 4000 psi (28 MPa) or more and the deflection limit is l/240.