Multi-objective Optimization of Semi-active Control of Seismically Exited Buildings Using Variable Damper and Genetic Algorithms

  • سال انتشار: 1391
  • محل انتشار: ماهنامه بین المللی مهندسی، دوره: 25، شماره: 3
  • کد COI اختصاصی: JR_IJE-25-3_008
  • زبان مقاله: انگلیسی
  • تعداد مشاهده: 777
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نویسندگان

s Pourzeynali

Department of Civil Engineering, Faculty of Engineering, The University of Guilan, Rasht, Iran

m malekzadeh

Department of Civil Engineering, Faculty of Engineering, The University of Guilan, Rasht, Iran

f esmaeilian

Department of Civil Engineering, Faculty of Engineering, The University of Guilan, Rasht, Iran

چکیده

Semi-active fluid viscous dampers as a subset of control systems have shown their ability to reduce seismic responses of tall buildings. In this paper, multi-objective optimization of the performance ofthis group of dampers in reducing the seismic responses of buildings is studied using multi-objectivegenetic algorithms. For numerical example, the 7 and 18 stories buildings are chosen and modeled as 3D frames. The equation of motion for each building subjected to earthquake accelerations is written in presence of semi-active fluid dampers and resolved in state-space. The optimal number and position ofdampers are considered as decision variables while the structural responses such as displacement of top floor, base shear and etc. are considered as the objective functions to be minimized. The objective functions are taken part in multi-objective optimization as a group of three functions. The goal isfinding so called Pareto-optimal solutions which are non-dominated to each other. It can optimize whole objectives as best as possible, simultaneously. In this case, any Pareto-optimal solution will be a certain configuration of some dampers in specific places of the structure. In this study, a fast and elitist non-dominated sorting genetic algorithm (NSGA-II) has been used.

کلیدواژه ها

Semi-active Control,Multi-objective Optimization,NSGA-II,Pareto Solution

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