Proceedings of the 2 nd Croatian Conference on Earthquake Engineering - 2CroCEE Zagreb, Croatia - March 22 to 24, 2023 Copyright © 2023 CroCEE DOI: https://doi.org/10.5592/CO/2CroCEE.2023.36 SEISMIC PERFORMANCE ASSESSMENT OF RC INDUSTRIAL BUILDING AFTER RETROFITTING BEAMS AND COLUMNS Niharika Peddaprolu (1) , Pradeep Ramancharla (2) , Aishwarya Gupta (3) , (1) PhD student, IIIT Hyderabad, niharika.peddaprolu@research.iiit.ac.in (2) Professor, IIIT Hyderabad, ramancharla@.iiit.ac.in (3) M. Tech, IIIT Hyderabad, aishwarya.gupta727@gmail.com Abstract A numerical study is done to determine the seismic performance of G+1 industrial RC building after retrofitting beams and columns. Deterioration of building has occurred due to excess chemical spillage over structural elements. Distressed beams and columns were retrofitted using jacketing techniques. The building is located in Indian Seismic Zone IV, so there is a need to understand the global seismic behaviour of the building after retrofitting. Nonlinear static pushover analysis is carried out to and the results indicate a decrease in the storey shear values. Keywords: Compressive Strength, Seismic Retrofitting, Push-over Analysis, Base Shear, Displacement, Jacketing 1. Introduction The G + 1 building was constructed 15 years ago. It is an industrial production plant where due to chemical spillage, the deterioration of beams and columns has occurred. A visual inspection is done along with Non-destructive testing. The results indicated that the compressive strength decreased to 10MPa and longitudinal reinforcement corroded up to 25 percentage. The structure is located in Indian Seismic Zone IV. Since the building was industrial plant with hazardous materials, there is a need for checking the seismic safety of the structure concerning the safety of the occupants. In the detailed report after Non-destructive Testing, it was mentioned that the distress in beams was majorly due to chemical spillage. In columns due to penetration of chemicals into the concrete substrate, large cracks were formed which lead to the corrosion of longitudinal reinforcement. To bring the structural elements to original strength, concrete jacketing of 100mm thickness on all sides for columns and 75mm thickness on three sides were suggested. The additional longitudinal and transverse reinforcement is added in the jacketed beams and columns. A total of 6 columns and 5 beams were retrofitted. Figure 1a and 1b represent the jacketed columns and beams respectively. Figure 1a: Column with 100mm concrete jacket 668