Seismic Retrofitting Columns And Beams With Carbon-Fiber Reinforced Polymer Using E ETABS17 TO Resist Earthquake Drift And D Magnitude According To BNBC 2020

Abstract

Bangladesh, as a developing country is on a brink of earthquake disaster as it sits on 3 of the tectonic plates. So, this study investigates seismic drift and earthquake response limit according to moment magnitude method of a four storied RC building and stair room roof as fifth story without and with carbon fiber reinforced polymer (CFRP) of Seismic Zone 3 according to BNBC 2020. The study has been done on a pre-existing building at Shimultoly, Joydebpur, Gazipur, Dhaka, Bangladesh. The building was made according to BNBC 2006. The results, as it turns out there were no displacements to be found and maximum drift in stories changes its value from story to story as there are some unusual differences between drifts in stories as, cases of drifts decreasing in the upper stories of building were found. Using CFRP, it decreases about 45%-53% of maximum story drift and resist earthquakes magnitude of 7 instead of magnitude o 6. As the building was constructed on 2019 it was built according to BNBC 2006 with some modification according to recent material types which is pretty much similar to recent BNBC 2020 code. So, an analysis has been done by ETABS-17 to find about displacement and drift of this building with and without CFRP according to BNBC 2020 standards and find out if this building can withstand earthquakes in all seismic zone of Bangladesh and if it can what will be limit of this structure’s earthquake response at the brink of collapse.