Performance assessment and optimization of fluid viscous dampers through life-cycle cost criteria and comparison to alternative design approaches

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• 作者：Ioannis Gidaris (1)
  Alexandros A. Taflanidis (1)
  
  1. Department of Civil and Environmental Engineering and Earth Sciences ; University of Notre Dame ; Notre Dame ; IN聽 ; 46556 ; USA
  
• 关键词：Life ; cycle cost optimal design ; Fluid viscous dampers ; Retrofitting ; Stationary response optimization ; Near ; fault pulses ; Equivalent lateral force damper design
• 刊名：Bulletin of Earthquake Engineering
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：13
• 期：4
• 页码：1003-1028
• 全文大小：1,274 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Civil Engineering
  Geophysics and Geodesy
  Hydrogeology
  Structural Geology
  
• 出版者：Springer Netherlands
• ISSN：1573-1456

文摘

The performance assessment and optimal design of fluid viscous dampers through life-cycle cost criteria is discussed in this paper. A probabilistic, simulation-based framework is described for estimating the life-cycle cost and a stochastic search approach is developed to support an efficient optimization under different design scenarios (corresponding to different seismicity characteristics). Earthquake losses are estimated using an assembly-based vulnerability approach utilizing the nonlinear dynamic response of the structure whereas a point source stochastic ground motion model, extended here to address near-fault pulse effects, is adopted to describe the seismic hazard. Stochastic simulation is utilized for estimation of all the necessary probabilistic quantities, and for reducing the computational burden a surrogate modeling methodology is integrated within the framework. Two simplified design approaches are also examined, the first considering the optimization of the stationary response, utilizing statistical linearization to address nonlinear damper characteristics, and the second adopting an equivalent lateral force procedure that defines a targeted damping ratio for the structure. These designs are compared against the optimal life-cycle cost one, whereas a compatible comparison is facilitated by establishing an appropriate connection between the seismic input required for the simplified designs and the probabilistic earthquake hazard model. As an illustrative example, the retrofitting of a three-story reinforced concrete office building with nonlinear dampers is considered.