Seismic retrofit of MRF buildings using decentralized semi‐active control for multi‐target performances |
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| Authors: | Young‐Jin Cha Anil K Agrawal |
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| Institution: | 1. Assistant Professor, Department of Civil Engineering, University of Manitoba, Winnipeg, Canada;2. Professor, Department of Civil Engineering, The City College of New York, New York, NY, USA |
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| Abstract: | Numerous structures have been designed and built without taking earthquake ground motions or outdated seismic design codes into account. In order to improve the seismic performance of existing structures, many retrofit approaches based on performance‐based design have been developed. However, some of these approaches are inapplicable due to structural limitations or because they were developed with the assumption of single‐degree‐of‐freedom, which does not take higher modes into account. To overcome the limitations of these traditional methods, a multi‐performance‐based control design (MPBCD) methodology has been proposed by integrating a decentralized semi‐active control algorithm, magnetorheological dampers, and an advanced multi‐objective optimization method to provide various sets of retrofit control designs to satisfy multiple target performances under multiple seismic intensities without changing structural cross‐section sizes or material properties. This MPBCD method provides engineers with numerous sets of control designs (i.e., control device layouts with control design parameters) to help them select proper control designs to retrofit existing building structures and improve seismic performance. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | multi‐target performances semi‐active control magnetorheological damper multi‐objective genetic algorithm nonlinear model nonlinear time‐history analysis |
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