Seismic Upgrade of an Existing Tall Building Using Different Supplemental Energy Dissipation Devices
Publication: Journal of Structural Engineering
Volume 144, Issue 7
Abstract
The feasibility and cost-effectiveness of various retrofit techniques to improve the seismic performance of an existing 35-story steel building are examined. Three types of supplemental energy dissipation devices are used in conjunction with basic retrofit measures to achieve the collapse prevention performance objective of current standards. Devices considered include fluid viscous dampers (FVDs), viscous wall dampers, and buckling restrained braces. The placement of the devices was kept the same in all three cases, considering overall architectural, programmatic, and constructability issues. The mechanical characteristics of the devices were selected using a simplified approach to achieve the same overall effective damping ratios and story drifts consistent with the targeted collapse prevention performance objective. The results of nonlinear dynamic analyses indicate that the FVD scheme was the most efficient for this structure in achieving the targeted performance goal and provided the most cost-effective means of improving the structural behavior and reducing economic losses for Level 2 basic safety earthquake hazard events. Future research needs related to the use of supplemental energy dissipation devices in existing buildings are also discussed.
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Acknowledgments
This paper was supported by the Pacific Earthquake Engineering Research Center (PEER) as part of its Tall Building Initiative and Next-Generation Attenuation Relationship programs. Special thanks are owed to Jiun-Wei Lai and Matthew Schoettler, who helped develop the OpenSees model for the as-built and Level 1 retrofit cases, as well as to Frank McKenna, Andreas Schellenberg, and Dimitrois Lignos, who provided numerous suggestions regarding the numerical models. The authors would also like to express their gratitude to Kazuhiko Kasai of the Tokyo Institute of Technology, Vesna Terzic of California State University, Long Beach, Joe Maffei and Lawrence Burkett of Maffei Structural Engineering, Amarnath Kasalanati of PEER, and Kit Miyamoto and Amir Gilani of Miyamoto International for sharing their valuable expertise in estimating the cost associated with retrofits and repairs.
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Published In
Journal of Structural Engineering
Volume 144 • Issue 7 • July 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: May 31, 2017
Accepted: Jan 26, 2018
Published online: May 14, 2018
Published in print: Jul 1, 2018
Discussion open until: Oct 14, 2018
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