• Rohit R. Borse
• Dr. Satish S. Deshmukh

Every building is built is to serve for some particular purpose, even after its service life is completed. The structure is required to get repaired in order to keep the structure in serviceable condition so that it fulfills its desire purpose, for which time to time maintenance and repair work are necessary. Every structure is constructed to serve a particular service, after the service structure is subjected to repairs. In order to keep the structure in good condition such that it fulfills its desire purpose, the maintenance and repairs are necessary. The maintenance of structure is done properly and periodically to prevent the structure from defects and hence prevent any repair works. Reinforced concrete is widely used for the construction material for different types of construction of structures. The major failure of rock structures is due to distress and deterioration. Generally, the minor defects in structures such as cracks and leakages are removed with the help of various repair techniques. However, if the defects extend to a considerable damage, rehabilitation is necessary. To keep the building in such a condition so that it provides it intended purpose of construction to improve the strength of the building and service of a building. The purpose of this project is economical structure rather than the reconstruction of the structure and to avoid various types of repairs, cracks, distress and deterioration in the structure. In this project a building taken for study which was 19 years before constructed, but due to poor construction it requires retrofitting. Columns, beams, slabs and walls need to retrofit; it requires increasing strength of the section. Finally, section-enlarging method is used for retrofitting of columns and jacketing method is used for retrofitting of beams. A proposed estimate is calculated with is about Rs. 7,26,827.00/-. Extended life of the building is about 45 years. Annual worth of the extended life period of building is about Rs. 600000/- per year. The experimental results of rebound hammer indicated that the strength of an existing building can be increased by retrofitting the building. Also, quality of concrete is in between Fair to Good for the building. The percentage increase in strength of the building before and after retrofitting is 57.75%. This project has reported on a structural experiment conducted to verify the effectiveness of a retrofitting method for reinforced concrete buildings that uses jacketing method and section- enlarging reinforcing method. Valuation of market is increased by 75% with retrofitting. The life cycle cost of Market is 41,58,563/- Rs.

"Performance Evaluation of Retrofitting of Reinforced Concrete Structures", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 6, page no.d726-d736, June-2022, Available :http://www.jetir.org/papers/JETIR2206390.pdf

"Performance Evaluation of Retrofitting of Reinforced Concrete Structures", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 6, page no. ppd726-d736, June-2022, Available at : http://www.jetir.org/papers/JETIR2206390.pdf