Strengthening of concrete filled steel tubular structures by carbon fiber reinforced composites

Abstract

Global research in civil engineering is taking place on Carbon Fibre-Reinforced Polymer composites (CFRPs), which are the optimal solution for repairing and strengthening the existing reinforced concrete structures. CFRP composite materials-based fibre-reinforced plastic wrap and laminate sheets are currently being used to repair and reinforce concrete. Carbon Fibre-Reinforced Polymers are a highly effective method for repairing and reinforcing weakened structures over their lifetime. CFRP-based repair systems provide an economically viable alternative to traditional repair systems and materials. The objective of the proposed research is 1. To analyze the behaviour of CFRP strengthened short and slendered CFST members, 2. To study the effect of CFRP sheet strengthening of CFST on load-carrying capacity, 3. To analyze the failure modes on reinforced concrete using various codal provisions, and 4. To estimate the confinement effect of CFST using ANFIS. However, the search for Concrete Filled Steel Tubular (CFSTs) did not begin until the 1960s. From that time onwards, several studies were conducted on the CFSTs to understand their behaviour to improve their performance fully. Over the past few decades, CFST Column has played an essential role in the construction industry. Over the last few decades, research proves that the fiber composite materials used for the construction and revamping process, have been found to have engineering and economic advantages. The external strengthening using Carbon Fibre Reinforced Polymer (CFRP) material is emerging as a new trend in enhancing the structural performance of CFST and counteracting the drawbacks in revamping work. newline