Experimental and Analytical Studies on Strengthened Axially Loaded RC Columns
Keywords:Strengthening, RC Column, Ferrocement, Micro Concrete, Stress-strains, Displacement control
The strengthening and retrofitting of concrete structures are becoming an essential part of the building and its structures. When the building comes of age, there is a need to increase the structural members' strength, life, and resistivity against unfavorable environmental conditions. In the current scenario, ferrocement composites are used for structural strengthening and rehabilitation. Therefore, an experimental investigation is needed to evaluate the effectiveness of the strengthening on the square and circular reinforced concrete columns by ferrocement and micro concrete materials. The experimental results showed that the ferrocement and micro concrete techniques enhanced the stress-strain behavior and displacement limit of the square and circular RC column. The strengthening circular RC column by micro concrete gives a better performance in stress-strain behavior and displacement limit. In addition, the ferrocement and micro concrete strengthening technique is a promising and economical alternative compared to the other strengthening techniques. Also, test results were compared with ACI and CNR–DT representative load-carrying models to verify each model's reliability and accuracy. Furthermore, the TOPSIS method was adopted to find out the best solution for square and circular columns, and cost analysis was carried out.
- RC columns were strengthened using ferro cement and micro concrete
- RC Columns under compressive concentric load were tested
- Micro concrete strengthening controls deflection and enhances the load capacity of columns
- The analytical approach of TOPSIS was used to find the best solution
M Kamiński and T Trapko. Experimental behaviour of reinforced concrete column models strengthened by CFRP materials. J. Civ. Eng. Manag. 2006; 12, 109-15.
ABMA Kaish, MR Alam, M Jamil, MFM Zain and MA Wahed. Improved ferrocement jacketing for restrengthening of square RC short column. Constr. Build. Mater. 2012; 36, 228-37.
ABMA Kaish, M Jamil, SN Raman and MFM Zain. Axial behavior of ferrocement confined cylindrical concrete specimens with different sizes. Constr. Build. Mater. 2015; 78, 50-9.
ABMA Kaish, M Jamil, SN Raman, MFM Zain and MR Alam. An approach to improve conventional square ferrocement jacket for strengthening application of short square RC column. Mater. Struct. 2016; 49, 1025-37.
P Rathish Kumar and CBK Rao. Constitutive behaviour of high-performance ferrocement under axial compression. Mag. Concr. Res. 2006; 58, 647-56.
M Soman and J Mohan. Rehabilitation of RC columns using ferrocement jacketing. Constr. Build. Mater. 2018; 181, 156-62.
GJ Xiong, XY Wu, FF Li and Z Yan. Load carrying capacity and ductility of circular concrete columns confined by ferrocement including steel bars. Constr. Build. Mater. 2011; 25, 2263-8.
B Kondraivendhan and B Pradhan. Effect of ferrocement confinement on behavior of concrete. Constr. Build. Mater. 2009; 23, 1218-22.
Abdullah and K Takiguchi. An investigation into the behavior and strength of reinforced concrete columns strengthened with ferrocement jackets. Cem. Concr. Compos. 2003; 25, 233-42.
K Fukuyama, Y Higashibata and Y Miyauchi. Studies on repair and strengthening methods of damaged reinforced concrete columns. Cem. Concr. Compos. 2000; 22, 81-8.
SM Mourad and MJ Shannag. Repair and strengthening of reinforced concrete square columns using ferrocement jackets. Cem. Concr. Compos. 2012; 34, 288-94.
M Yaqub, CG Bailey, P Nedwell, QUZ Khan and I Javed. Strength and stiffness of post-heated columns repaired with ferrocement and fibre reinforced polymer jackets. Compos. B. Eng. 2013; 44, 200-11.
A Mimiran and M Shahaway. Behavior of concrete column confined by fiber composites B Amir Mirmiran 1 and Mohsen Shahawy / Members, ASCE, ASCE. J. Struct. Eng. 1997; 123, 583-90.
K Soudki and T Alkhrdaji. Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures (ACI 440.2R-02). In: Proceedings of the 2005 Structures Congress and the 2005 Forensic Engineering Symposium, New York, the United States. 2005, p. 8.
IS 269 - 2015, IS 269 - 2015. Ordinary portland cement - Specification. 2015.
IS 2386 (Part-I)-1963. Methods of test for aggregates for concrete. 2016.
IS 2386 (Part-III)-1963. Methods of test for aggregates for concrete. 2016.
IS 2863 (Part-IV)-1963. Methods of test for aggregates for concrete. 2016.
BIS:10262. Indian standard guidelines for concrete mix design proportioning. Bureau of Indian Standards, New Delhi, 2009.
IS:1786-2008. High strength deformed steel bars and wires for concretereinforcement— specification. Bureau of Indian Standards, New Delhi, 2008, p. 1-12.
ACI Committee 549 1R. Guide for the design, construction, and repair of ferrocement reported. ACI Struct. J. 2009; 85, 325-51.
IS 516-1959. Methods of tests for strength of concrete. 2018.
IS 456. Concrete, plain and reinforced. Bureau of Indian Standards, New Dehli, 2000, p. 1-114.
CNR-DT 200 R1/2013. Guide for the design and construction of externally bonded FRP systems for strengthening existing structures. Consiglio Nazionale delle Ricerche, Italy, 2013.
SR Salla, CD Modhera and UR Babu. An experimental study on various industrial wastes in concrete for sustainable construction. J. Adv. Concr. Technol. 2021; 19, 133-48.
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