“Seismic Strengthening Of Structures with Exterior Retrofitting”

Abstract

Seismic engineering provides design and construction techniques so that buildings and other structures can survive the tremendous forces of earthquakes. While codes and design practices have resulted in greatly improved designs of new buildings, the main danger lies in the nation's inventory of existing vulnerable buildings. This study examines the seismic retrofitting project for a 7-storied building designed only for gravity load situated in seismic zone III as defined in Indian Seismic Code IS 1893 (Part I): 2002.

Different solutions for increasing the lateral rigidity of the buildings are presented in the study, based on the idea that the disturbance to the residents of the buildings, noise, vibrations, and dust has to be minimized. For performance evaluation of commonly used methods of retrofitting, few retrofitting methods such as external shear walls, jacketing are selected. These methods are applied in the FEM model of the existing building analyzed earlier. For performance evaluation, important structural aspects such as base shear, displacement and lateral resistance provided were considered.