Analytical Fragility Curves for Reinforced Concrete Dual System Subjected to Seismic Loads

Abstract

The objective of this paper is to analyze different retrofit schemes of concrete members of a dual frame system with CFRP. This is implemented on a medium height reinforced concrete building designed prior to the seismic ductility provisions being added to the ACI code. Focusing on medium height concrete buildings allows the research to be adjusted and applied to a wide range of occupancy types. Pushover analysis was carried out to verify the response of the building is as expected and the modeling is accurate for the shear wall and moment frame systems. This was followed by a non-linear time history analysis to collect column rotation information. Fragility curves are developed to obtain statistical damage ratios under different retrofit methods. These curves show the improvement from each retrofit scheme and provide visual representation of the comparison to other retrofit methods discussed.