Abstract
In this paper, numerical and experimental studies on the elastic behavior of glass fiber reinforced polymer (GFRP) with stiffeners in the GFRP section's web (to prevent local buckling) are presented. The GFRP profiles were connected to the concrete deck slab by shear connectors. Two full-scale simply supported composite beams (with and without stiffeners) were tested under impact load (three-point load) to assess its structural response. The results proved that the maximum impact force, maximum deflection, damping time, and damping ratio of the composite beam were affected by the GFRP stiffeners. The experimental results indicated that the damping ratio and deflection were diminished compared to hybrid beam without stiffeners by 16% and 22%, respectively, and increasing damping time by 26%. Finite element models were used to study pre-failure behavior. The numerical modeling results showed good agreement with experimental data in terms of loading path and final load. The damping ratio and midspan deflection values were greater than the experimental values by 6% and 12%, respectively.
Highlights
Glass fiber reinforced polymer (GFRP), known as enhanced composite material (ACM), is a composite made of a matrix fiber-reinforced polymer resin matrix (Abbas et al, 2017)
6.1 Experimental Results To study the effect of impact loads on composite beams' strength and performance, two supported composite beams were tested under impact loading
In order to make better use of material properties, glass fiber reinforced polymer (GFRP) profiles can be used in combination with concrete elements and have multiple advantages related to the stiffness and strength of the structural elements, which results in the solution being suitable for degraded floor restoration and new construction projects
Summary
Glass fiber reinforced polymer (GFRP), known as enhanced composite material (ACM), is a composite made of a matrix fiber-reinforced polymer resin matrix (usually glass, carbon, basalt, or aramid) (Abbas et al, 2017). In recent years, improved durability and high construction speed of flooring systems have led to the exploration of new structural solutions, and FRP and GFRP increase in particular due to their durability, low weight, ease of installation, greater durability in harsh environments, and low maintenance requirements (Keller, 2002; Seible et al, 1999). Due to the low strength of the material, high initial costs, and lack of design codes, FRP materials are not widely used as load-bearing elements. The strength of the FRP fragment is mainly determined by the type of fiber and its orientation, amount, and location. There are many industrial FRP products used in civil/structural engineering applications
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