Abstract
This research article has been analyzed to examine the structural enhancement of concrete-filled steel tube (CFST) sections used externally with carbon fiber reinforced polymer. Due to their structural benefits, concrete-filled steel tubular sections are among the most common today. High strength, reduced cross-section, excellent seismic-resistant structural properties, increased fire resistance, and improved visible stiffness are just some of the advantages. Carbon fiber was used as a form of strips with a different number of layers and strip spacing on beam and column specimens. Twelve columns were tested, ten of which were externally reinforced with CFRP strips of various widths and spacing, and the remaining two columns were not reinforced with carbon fiber. However, ten beams were tested, eight of which were externally reinforced with CFRP strips of various widths and spacing, and the other two beams were not reinforced with carbon fiber. All specimens were tested at one point loading under a universal testing machine. Experimental results found that in comparison to the reference column and beam, the CFST column and beam specimens reinforced by carbon fiber have a higher load capacity.
Highlights
CFRP fabrics have been used in steel wrapping systems of columns
The outside covering of CFRP fabrics under high load conditions indicates a greater increase in moment carrying ability and reduced deflection in beams
Twenty small beams were presented in this work, with five types of CFRP used for the concrete-filled steel tube (CFST) section, and measured in a four-point loading under the axial and flexural machine
Summary
CFRP fabrics have been used in steel wrapping systems of columns. The combination of carbon fiber and concrete-filled steel tubular square systems has been investigated. The outside covering of CFRP fabrics under high load conditions indicates a greater increase in moment carrying ability and reduced deflection in beams. Its purpose is to create a variety of wrapping methods that can be utilized to repair structures, as well as to examining the impact of increasing the number of FRP layers in increasing moment carrying capacity. Concrete-filled steel sections have been widely used because they are critical for the overall structure's safety. Steel tubes are loaded with concrete in a structural portion known as CFST. By mixing steel tube and concrete, CFST sections offer the perfect combination. There are several benefits of the CFST structure such as stiffness; stable ductility, high load absorption capacity, and fire resistance
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