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Multi directional hysteretic damper with adaptive post-elastic stiffness for seismic protection of bridges in near fault zones
Date
2010-07-15
Author
Dicleli, Murat
Milani, A. Salem
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A new hysteretic damper for seismic protection of highway bridges is presented. The Multidirectional Torsional Hysteretic Damper (MTHD) works based on torsional yielding of steel cylindrical cores. The device demonstrates a hyperbolic post-elastic stiffness as a result of its special working mechanism which produces this geometric hardening effect. The post-elastic stiffness was found to be effective in limiting the lateral displacement of the seismic-isolated bridge decks in near-fault. Results of nonlinear time history analyses revealed the adaptive behavior of the device which is a result of this gradual hardening feature, such that at lower displacements (DBE), force levels are close to a regular system while at highest levels of displacements (MCE), the device hardens to make the substructure yield and limit deck's displacement.
URI
https://hdl.handle.net/11511/53765
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Department of Engineering Sciences, Conference / Seminar
