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Hybrid structural control using viscoelastic dampers and active control systems
Author(s) -
Tzan ShyhRong,
Pantelides C. P.
Publication year - 1994
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.4290231207
Subject(s) - damper , viscoelasticity , control theory (sociology) , weighting , acceleration , reduction (mathematics) , engineering , structural engineering , control system , tuned mass damper , computer science , control (management) , materials science , physics , mathematics , acoustics , geometry , classical mechanics , electrical engineering , artificial intelligence , composite material
Viscoelastic (VE) dampers and active control (AC) systems are studied together as a hybrid system for their effectiveness in reducing the response of seismic structures. VE dampers have properties which are both frequency and temperature‐dependent. On the other hand, AC systems for seismic structures require rather large control forces in order to be effective. The possibility of combining VE dampers and AC systems to improve the performance of both systems is examined. It is found that for the same response reduction, the addition of VE dampers to an AC system reduces the required control forces considerably, which reduces the cost of the AC system. The addition of the AC system helps improve the velocity performance of VE dampers and considerably reduces the possibility of shear failure of the viscoelastic material. Two procedures for evaluating the damping effect of the VE dampers are suggested which can be applied to either shear‐type or framed structures. Two control algorithms based on drift and velocity/acceleration feedback are compared to existing algorithms. A method of determining the weighting matrices of an AC system is presented which reduces the required control forces for certain control algorithms.