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Seismic loss assessment of steel structures equipped with rotational friction dampers subjected to intensifying dynamic excitations
https://orcid.org/0000-0003-2532-2906
Highlights An optimal design method for RFDs at multiple seismic hazard levels is proposed. A Monte Carlo procedure is used to account for uncertainties in FEMA P-58 framework. RFDs’ effectiveness is measured by calculating % reduction in annualized total loss. Loss assessment results obtained by ground motions and ET method are compared. The cost payback period of damping systems is calculated by cost-benefit analysis.
Abstract The expected seismic losses of structures with Rotational Friction Dampers (RFDs) are assessed by the Endurance Time (ET) method considering the optimal frictional moment of the devices. A practical method is proposed to obtain the optimal frictional moment of the dampers in multi-story structures at multiple seismic hazard levels. The ET method is used as the analytical tool in this research due to its ability to reduce the number of required analyses and providing good estimations of structural responses at various hazard levels. In order to investigate the effectiveness of the dampers, the life cycle costs of a weak steel structure equipped with optimal RFDs are compared with a standard structure with optimal RFDs and without RFDs. To this end, a comprehensive performance evaluation is performed on the structures based on FEMA P-58 methodology. The ET method is also used as a tool to assess the structural responses in the framework of this methodology. The probability of collapse, fatalities, and expected damage costs are estimated utilizing a Monte Carlo procedure considering uncertainties. Also, a cost-benefit analysis is performed to determine the payback period of investment for the additional cost of the rotational friction damping systems.
Seismic loss assessment of steel structures equipped with rotational friction dampers subjected to intensifying dynamic excitations
https://orcid.org/0000-0003-2532-2906
Highlights An optimal design method for RFDs at multiple seismic hazard levels is proposed. A Monte Carlo procedure is used to account for uncertainties in FEMA P-58 framework. RFDs’ effectiveness is measured by calculating % reduction in annualized total loss. Loss assessment results obtained by ground motions and ET method are compared. The cost payback period of damping systems is calculated by cost-benefit analysis.
Abstract The expected seismic losses of structures with Rotational Friction Dampers (RFDs) are assessed by the Endurance Time (ET) method considering the optimal frictional moment of the devices. A practical method is proposed to obtain the optimal frictional moment of the dampers in multi-story structures at multiple seismic hazard levels. The ET method is used as the analytical tool in this research due to its ability to reduce the number of required analyses and providing good estimations of structural responses at various hazard levels. In order to investigate the effectiveness of the dampers, the life cycle costs of a weak steel structure equipped with optimal RFDs are compared with a standard structure with optimal RFDs and without RFDs. To this end, a comprehensive performance evaluation is performed on the structures based on FEMA P-58 methodology. The ET method is also used as a tool to assess the structural responses in the framework of this methodology. The probability of collapse, fatalities, and expected damage costs are estimated utilizing a Monte Carlo procedure considering uncertainties. Also, a cost-benefit analysis is performed to determine the payback period of investment for the additional cost of the rotational friction damping systems.
Seismic loss assessment of steel structures equipped with rotational friction dampers subjected to intensifying dynamic excitations
https://orcid.org/0000-0003-2532-2906
Highlights An optimal design method for RFDs at multiple seismic hazard levels is proposed. A Monte Carlo procedure is used to account for uncertainties in FEMA P-58 framework. RFDs’ effectiveness is measured by calculating % reduction in annualized total loss. Loss assessment results obtained by ground motions and ET method are compared. The cost payback period of damping systems is calculated by cost-benefit analysis.
Abstract The expected seismic losses of structures with Rotational Friction Dampers (RFDs) are assessed by the Endurance Time (ET) method considering the optimal frictional moment of the devices. A practical method is proposed to obtain the optimal frictional moment of the dampers in multi-story structures at multiple seismic hazard levels. The ET method is used as the analytical tool in this research due to its ability to reduce the number of required analyses and providing good estimations of structural responses at various hazard levels. In order to investigate the effectiveness of the dampers, the life cycle costs of a weak steel structure equipped with optimal RFDs are compared with a standard structure with optimal RFDs and without RFDs. To this end, a comprehensive performance evaluation is performed on the structures based on FEMA P-58 methodology. The ET method is also used as a tool to assess the structural responses in the framework of this methodology. The probability of collapse, fatalities, and expected damage costs are estimated utilizing a Monte Carlo procedure considering uncertainties. Also, a cost-benefit analysis is performed to determine the payback period of investment for the additional cost of the rotational friction damping systems.
Seismic loss assessment of steel structures equipped with rotational friction dampers subjected to intensifying dynamic excitations
Shirkhani, Amir (Autor:in) / Farahmand Azar, Bahman (Autor:in) / Charkhtab Basim, Mohammad (Autor:in)
Engineering Structures ; 238
08.03.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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