Coupled Thermo-Mechanical Analysis of Reinforced Concrete Columns Partially Confined with Carbon Fibre Reinforced Polymer (CFRP) at Elevated Temperatures

In this study, the thermo-mechanical behaviour and failure characteristics of reinforced concrete (RC) columns under high temperatures are the focus of an extensive numerical investigation. The fundamental goals of this study are threefold: first, utilising cutting-edge ABAQUS CAE software, the authors discuss the construction and validation of a robust numerical model for RC columns that are successfully contained by two layers of partial carbon fibre-reinforced polymer (CFRP). Second, a thorough evaluation of how partial CFRP confinement affects RC column performance is carried out. Finally, ISO 834 Standard Fire curve testing is used to assess the reaction and structural behaviour of RC concrete columns that have been particularly reinforced with two layers of partial CFRP. Circular RC column specimens of uniform dimensions (200mm in diameter and 1000mm in height) are used as testing materials in this investigation. In order to explore the complicated relationship between temperature, confinement, and structural integrity, finite element analysis (FEA) procedures are methodically carried out using ABAQUS CAE software. This study investigates the thermo-mechanical behaviour of reinforced concrete (RC) columns partially confined with CFRP at elevated temperatures in order to improve their fire resistance. The study employs advanced finite element analysis (FEA) using ABAQUS CAE software to measure enhancements in structural integrity. The findings indicate a 20% augmentation in load-bearing capacity and a notable postponement in the initiation of failure under ISO 834 standard fire conditions. This study adds to our knowledge of the behaviour of RC columns reinforced with partial CFRP confinement, in particular when subjected to high temperatures. Sustainable and resilient structural engineering methods can benefit greatly from such insights, as they can help advance fire-resistant design strategies and reinforce measures for important facilities.