Parametric Study of Rectangular Reinforced Concrete Columns Confined by Carbon Fiber Reinforced Polymer Under Axial Load

Abstract

This paper studies the effects of the behavior of normal strength rectangular concrete (NSC) columns confined by carbon fiber-reinforced polymer (CFRP) sheets. Six reinforced concrete columns with dimensions (100mmx100mmx900mm) have been cast and tested. These specimens were subjected to pure axial compressive loading up to failure. Included in the study is the influence of three parameters. Those parameters are the CFRP distribution (5 strips and full wrapping), column slenderness ratio (40, 30), and steel reinforcement ratio (ρ = 0.0113, 0.0314, 0.0678). Those results show a high enhancement in the columns’ load capacity for the first cracking load and the ultimate load for all of the columns.

Behavior of Circular Reinforced Concrete Columns Strengthened by Different Techniques Subjected to Axial Loading

“…Recently, the methods of strengthening include externally bonded reinforced (EBR), externally bonded reinforced on grooves (EBROG), near surface mounted (NSM), and textile-reinforced mortar (TRM) [2]. The benefits of strengthening/retrofitting RC columns with CFRP composites (laminates, sheets) include corrosion resistance, attractive mechanical properties, ease of implementation, and substantial durability [3,4]. Numerous studies have been carried out to examine the effects of fiber-reinforced polymer (FRP) composites on the behavior of reinforced concrete (RC) columns under both concentric and eccentric loading conditions.Several studies have endeavored to enhance the strength of columns by employing longitudinal fiber-reinforced polymer (FRP) and investigating the effect of different fiber orientations of FRP on column performance [5][6][7].…”