Abstract:
Earthquake is a curse of a developing country like Bangladesh, so developing country
needs to be ready to resist this kind of hazardous. For this reason we need to study how to
increase stiffness of the structure. So we choose Finite Element package ETABS to
conduct this study. We also select updated national building code and follow the
guideline to simulate analysis. Arbitrary a residential building was selected for this study,
which is situated in savar, Dhaka. This building standing on zone-2 according to BNBC
2020, but same structure also simulate remaining 3 difference zone also. Retrofitting is
one of the methods to strengthening the structure against earthquake force. In this study
we use steel bracing retrofitting method and try to estimate 16 different bracing
conditions against earthquake force. Finally we use 300 mm x 300 mm cross sectional
size bracing with 13 mm, 16 mm, 18 mm and 25 mm thickness. But the use maximum
size of bracing we are able to bring the displacement ratio of the response spectrum to
1.24 from 1.39 at no bracing condition. Although this was not good enough, but finally
we were able to mostly reduce the displacement ratio for the response spectrum force.
