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Simultaneous topology and sizing optimization of viscous dampers in seismic retrofitting of 3D irregular frame structures
Author(s) -
Lavan Oren,
Amir Oded
Publication year - 2014
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.2399
Subject(s) - damper , retrofitting , sizing , structural engineering , topology optimization , seismic retrofit , frame (networking) , interpolation (computer graphics) , engineering , optimization problem , shape optimization , mathematical optimization , computer science , topology (electrical circuits) , mathematics , mechanical engineering , finite element method , art , reinforced concrete , visual arts , electrical engineering
SUMMARY A new methodology for performance‐based optimal seismic retrofitting using a limited number of size groups of viscous dampers is presented. The damping coefficient of each size group of dampers is taken as a continuous variable and is determined by the optimization algorithm. Furthermore, for each potential location, a damper of a single size group is optimally assigned, if any. Hence, the formulation presents a large step forward towards practical optimal design of dampers. The key for achieving an efficient optimization scheme is the incorporation of material interpolation techniques that were successfully applied in other structural optimization problems of discrete nature. This results in a very effective optimization methodology that is expected to be very efficient for large‐scale structures. The proposed approach is demonstrated on several example problems of 3D irregular frame structures. Copyright © 2014 John Wiley & Sons, Ltd.