On Mechanical Characteristics of HFRP Bars with Various Types of Hybridization
The principal objective of this study is to elaborate the reliable properties for hybrid fiber-reinforced polymer (HFRP) bars, which will have the potential to be considered as a competitive alternative to conventional reinforcement for concrete structures. Understanding mechanical performance of HFRP bars with various types of hybridization will allow for more precise design estimations that will balance safety and cost. Numerical modeling of tensile strength test was performed for hybrid carbon/glass fiber-reinforced polymer (HC/GFRP) bars and hybrid carbon/basalt fiber-reinforced polymer (HC/BFRP) bars with the use of finite element analysis (FEA) simulations. The variable parameters were two factors: the bar configuration and volume fraction of fibers. Results indicate that for both HC/GFRP and HC/BFRP bars, the location of carbon fibers in the near-surface region is more appropriate when the volume fraction of carbon fibers is less than volume fraction of glass (or basalt) fibers; otherwise, it is better to locate carbon fibers in the core region. Results of numerical modeling were considered for producing HFRP bars for further experimental investigations.
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