Premium
Optimal design of added viscoelastic dampers and supporting braces
Author(s) -
Park JiHun,
Kim Jinkoo,
Min KyungWon
Publication year - 2003
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.359
Subject(s) - brace , viscoelasticity , damper , flexibility (engineering) , stiffness , computation , constraint (computer aided design) , structural engineering , process (computing) , function (biology) , control theory (sociology) , bracing , computer science , engineering , control (management) , mathematics , mechanical engineering , algorithm , materials science , statistics , evolutionary biology , artificial intelligence , composite material , biology , operating system
This paper presents a simultaneous optimization procedure for both viscoelastic dampers (VEDs) and supporting braces installed in a structure. The effect of supporting braces on the control efficiency of VEDs is also investigated. To apply a general gradient‐based optimization algorithm, closed‐form expressions for the gradients of objective function and constraints are derived. Also, the constraint on the dynamic behavior of a structure is embedded in the gradient computation procedure to reduce the number of variables in the optimization. From numerical analysis of an example structure, it was found that when sufficient stiffness cannot be provided for the supporting braces, the flexibility of the brace should be taken into account in the design of the VED to achieve the desired performance of the structure. It was also observed that, as a result of the proposed optimization process, the size of the supporting brace could be reduced while the additional VED size (to compensate for the loss of the control effect) was insignificant. Copyright © 2003 John Wiley & Sons, Ltd.