Journal
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
Volume 87, Issue -, Pages 151-163Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.soildyn.2016.01.020
Keywords
Fluid Viscous Dampers; Kelvin-Voigt model; Multi-objective optimization; Pareto sets; Adjacent structures
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This paper deals with the optimum design of a passive seismic control strategy which adopts a linear dissipative connection in a wall-frame system. The two sub-structures, the wall and the frame, respectively, are modeled as single degree of freedom systems, and are excited by a ground motion represented by a filtered non stationary stochastic process. The passive control strategy is based on a global protection, which aims to protect both sub-structures. For this purpose, a multi-objective optimum design is formulated where two conflicting objective functions coexist: these are the displacement of the frame and the shear in the wall. In order to obtain the optimum solution in terms of Pareto set, a genetic algorithm approach-the NSGA-II-is adopted. The novelty of the proposed method is the use of a multidimensional criterion for the design of the dissipative connection and to consider a global seismic protection criterion. This is a very important issue in modern Technical Codes, where several performance requirements are fixed and often conflicting. (C) 2016 Elsevier Ltd. All rights reserved.
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