Abstract
Presently, increasingly more concrete structures strengthened with glass-fiber-reinforced polymer (GFRP) tendons have been employed in practical civil engineering owing to outstanding advantages, such as anti-corrosion, cost-effectiveness, and ease of production. These structures have demonstrated unique characteristics and mechanical response compared to steel-tendon-reinforced concrete structures in both service and ultimate load-bearing states. Therefore, in this study, to analyze completely GFRP-tendon-reinforced concrete slabs under localized wheel pressure, loading tests were conducted on two full-scale fabricated frame structures while considering the influence of membrane action on the cover slab. The mechanical response of these structures was revealed using the obtained load-displacement curves, ultimate bearing capacity, and crack morphology. The membrane action mechanism of the slab under weak lateral constraints was studied through the finite element method. The method to determine the effective membrane region of the reinforced slab was discussed and the corresponding ultimate bearing capacity was proposed considering the compressive-tensile membrane action under different failure modes. This model provides a preliminary reference for the quantitative determination of the structural properties of GFRP-tendon-reinforced concrete slabs.
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