VULNERABILITY ASSESSMENT OF MODULAR STEEL PLATFORM STRUCTURES UNDER SEISMIC LOADS

Abstract

ABSTRACT Modular steel structures are the standard method of construction in the arctic region. In this study, the feasibility of retrofitting these structures, using friction dampers, is evaluated. These structures possess some unique detailing that is the result of the method of construction used for them. This detailing is believed to contribute to the vulnerability of these structures during major seismic events. Analytical fragility curves are developed to evaluate the benefit of using friction dampers in reducing the risk of damages during significant earthquakes. The methodology that was used to develop the curves is based on calculating the maximum story drift using nonlinear time history analysis for different ground motions with different intensities and frequencies. The produced fragility curves highlight the advantages of using friction dampers in reducing the level of damage these structures can experience during earthquakes.