"Seismic Response with Retrofitting for G+9 Multistoried R.C. Structure Utilizing R.C.C Jacketing as Well as Steel Wrapping Techniques by Using ETAB"
Shaikh Mohammad Sarfaraz Moin1, Prof. D.M. Pandit2
1MTech Student, Department of Civil Engineering, Chh. Shahu College of Engineering, Chhatrapati Sambhajinagar, Maharashtra 431001.
2Assistant Professor, Department of Civil Engineering, Chh. Shahu College of Engineering, Chhatrapati Sambhajinagar, Maharashtra 431001.
ABSTRACT
Seismic retrofitting greatly improves the safety and effectiveness of reinforced concrete (R.C.) buildings in earthquake-prone areas, and this study examines this phenomenon in the G+9 multiple-story concrete buildings. It examines the seismic response and the effects of two common retrofitting techniques — RCC (Reinforced Cement Concrete) Jacketing and Steel Wrapping. Using ETABS software, we carried out digital modeling and analyses, including both nonlinear static and dynamic (time history) analyses with reference to the El-Centro and Uttarkashi earthquake data. For both retrofitted and non-retrofitted scenarios, important features of the buildings, including the natural and derived (shear and axial) frequencies, lateral slip and uneven shifting (drift) of the floors and base, overall mass, and stress distribution, were assessed. The data indicated improved stiffness, overall mass, and load-carrying-ability of all retrofitted structures, and showed noticeable differences in the RCC Jacketing and Steel Wrapping techniques. For the overall retrofitting of buildings, RCC Jacketing was more effective in stiffness improvement and overall mass than Steel Wrapping. Improved strength and drift minimization were achieved, and practical applications retrofitting-system-selection of high-rise concrete structures gained based on steel wrapping development.
Keywords: Seismic Retrofitting, RCC Jacketing, Steel Wrapping, ETABS, Time-History Analysis, Inter-Storey Drift, Lateral Displacement, Base Shear, Structural Stability, Earthquake-Resistant Design.
