Theoretical Non-Linear Analysis of Composite ( Pultruded GFRP I-Section and Deck Concrete) Strengthened With GFRP Stiffness: Theoretical Non-Linear Analysis of Composite ( Pultruded GFRP I-Section and Deck Concrete) Strengthened With GFRP Stiffness

Abstract

This research paper examines the non-linear behavior of a glass fiber-reinforced polymer (GFRP) beam when combined with a concrete slab. The investigation is conducted by analyzing the variable modulus of elasticity of the materials, employing Karpenko's model. The paper comprehensively elucidates the outcomes derived from experimental inquiries into the system dynamics of I-section GFRP. The composite structure consists of concrete slabs cast on top of GFRP beams, which are joined using shear connectors in bolts to ensure full interaction. The maximum failure load is determined through theoretical calculations, and the stiffness of the GFRP material is also calculated. The present study examined composite beams with a net length of 2600 mm. Various variables were considered, including the influence of concrete type (normal and high concrete) and the impact of using GFRP T-sections fixed with bolts and epoxy on the behavior of the composite system. The primary findings indicated that using high-strength concrete resulted in a significant increase of 98 % in the highest failure load compared to conventional concrete. The study's outcomes highlight the importance of the study's purpose, which is to build a robust technological basis for efficiently utilizing concrete and GFRP composite beams. The objective will be accomplished through the implementation of a thorough examination of both empirical and theoretical information. The data mentioned above will then be utilized to establish principles for design and standards for concrete and GFRP composite structures. Furthermore, using Karpenko's model for analyzing the composite beam demonstrates a notable concurrence among the numerical, experimental, and theoretical findings.