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Development and experimental evaluation of a passive gap damper device to prevent pounding in base‐isolated structures
Author(s) -
Rawlinson Taylor A.,
Marshall Justin D.,
Ryan Keri L.,
Zargar Hamed
Publication year - 2015
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.2542
Subject(s) - earthquake shaking table , damper , dissipation , base isolation , engineering , structural engineering , base (topology) , reliability (semiconductor) , displacement (psychology) , shake , finite element method , isolation (microbiology) , reliability engineering , mechanical engineering , psychology , mathematical analysis , power (physics) , mathematics , microbiology and biotechnology , frame (networking) , quantum mechanics , biology , psychotherapist , thermodynamics , physics
Summary Studies have shown the effectiveness of providing supplemental energy dissipation in base‐isolated structures to reduce displacements at the isolation level. A previous analytical study demonstrated the benefits of providing this energy dissipation at a specified gap larger than the design displacement. The gap before engagement allows the base isolation system to meet performance criteria in varying levels of ground excitation. Use of this ‘gap damper’ device eliminates undesirable effects often exhibited with large amounts of supplemental damping at lower intensity motions. Using results from an analytical study, the primary purpose of this research was to develop devices for practical implementation. Development of the devices demanded simplicity, feasibility, economy, and reliability to be an effective option in building design and construction. Multiple designs were proposed, and a final design was chosen based on selection criteria and finite element analyses. The device was designed and tested in Auburn University's Structural Research Lab. Experimental results were compared with theoretical models to verify behavior and make necessary adjustments for a shake table experiment. The design parameters were selected to accommodate re‐use of the device for the shake table test. Copyright © 2015 John Wiley & Sons, Ltd.