Enhancing load capacity of reinforced concrete columns using high strength concrete and fiber reinforcement

• Published in: Sustainable Engineering and Innovation Vol. 6; no. 2; pp. 177 - 184
• Main Authors: Ali, Shaima Sabri, Hassoon, Alaa, Abbas, Hajer Satih, Albassam, Bassam Farman
• Format: Journal Article
• Language: English
• Published: 18.09.2024
• ISSN: 2712-0562; 2712-0562
• DOI: 10.37868/sei.v6i2.id350

Strengthening of structural elements is sometimes necessary for architectural purposes to withstand additional loads without cross-section enlargement. This study evaluates the structural performance of reinforced concrete columns toughened using high-strength concrete, steel fiber concrete of 1% volume fraction, and near-surface mounted NSM steel or carbon fiber reinforced polymer CFRP bars. Five columns of 0.15×0.15×1 m were cast and axially loaded till failure. The investigational consequences revealed that a load-carrying capacity and stiffness augmented by 55.1 and 91.1% when the compressive strength is 1.5 times the normal with a ductility decrease of 28.2% whereas steel fiber concrete raised them by 34.3, 6.4, and 11.6%. In addition, NSM steel or CFRP bars exhibited ultimate loads and stiffness 13.6 to 29.7% and 17.2 to 21.7% higher than the non-strengthened column. However, the ductility decreased by 2.5 to 12.4%.