Seismic Fragility Assessment of Building with Metallic Hysteretic Damper in Consideration of Stiffness Ratio

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The application of hysteretic steel damper for seismic protection and rehabilitation has been recognized efficient and cost effective method in reducing structural responses under seismic events. The damper absorbs seismic energy through its hysteretic behaviour. This study aims to assess the vulnerability of building strengthened with hysteretic steel damper considering variability of stiffness ratio parameter in hysteretic steel damper for the application in six-story steel building. Probabilistic Seismic Demand Model (PSDM) for the structural model is developed by using nonlinear dynamic analysis under 30 ground motions. Furthermore, fragility curves are constructed based on inter-story drift and spectrum acceleration. Finally, the performance of the steel structure with and without hysteretic steel damper in addition to optimal stiffness ratio is presented and compared.

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377-382

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March 2018

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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