Influence of High Temperatures on the Mechanical Properties of GFRP Pultruded Sections- Review
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Abstract
The application of pultruded (GFRP) composite has become increasingly prominent in civil infrastructure projects. This study provides a comprehensive analysis of experimental and numerical studies conducted on the mechanical characteristics of (GFRP) composites across various temperature conditions, encompassing ambient and fire scenarios. The compilation comprises over 100 scholarly articles that examine the mechanical behavior of (GFRP) materials, specifically emphasizing their tensile and compressive strengths, showed the mechanical properties of (GFRP) materials are commonly compromised when exposed to high temperatures that approach or surpass the resin's glass transition temperature (Tg). In contrast, temperatures that are lower than the glass transition temperature (Tg) have the potential to cause minimal degradation. This study provides that at temperatures exceeding 450°C, the tensile strength of (GFRP) bars experiences a significant decline, with a retention rate of less than 20%. Similarly, GFRP laminates or sheets exhibit a substantial loss in strength, ranging from 68% to 94%, when exposed to temperatures exceeding 400°C. Also, the optimal model and the closest results to practical experiments in the case of compression are the models (Mahieux and wang). This review provides an in-depth understanding of the GFRP composite's behavior after being subjected to elevated temperatures. The results presented in this literature review could be used as a base for developing predictive models related to GFRP composite behavior after being subjected to elevated temperatures.
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