Reports Outline Earthquake Engineering Study Results from University of Notre Dame (Performance assessment and optimization of fluid viscous dampers…

Reports Outline Earthquake Engineering Study Results from University of Notre Dame (Performance assessment and optimization of fluid viscous dampers through life-cycle cost criteria and comparison to alternative design approaches)

By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators publish new report on Earthquake Engineering. According to news reporting from Notre Dame, Indiana, by VerticalNews journalists, research stated, "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)."

The news correspondents obtained a quote from the research from the University of Notre Dame, "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."

According to the news reporters, the research concluded: "As an illustrative example, the retrofitting of a three-story reinforced concrete office building with nonlinear dampers is considered."

For more information on this research see: Performance assessment and optimization of fluid viscous dampers through life-cycle cost criteria and comparison to alternative design approaches. Bulletin of Earthquake Engineering, 2015;13(4):1003-1028. Bulletin of Earthquake Engineering can be contacted at: Springer, Van Godewijckstraat 30, 3311 Gz Dordrecht, Netherlands. (Springer - www.springer.com; Bulletin of Earthquake Engineering - www.springerlink.com/content/1570-761x/)

Our news journalists report that additional information may be obtained by contacting I. Gidaris, University of Notre Dame, Dept. of Civil & Environm Engn & Earth Sci, Notre Dame, IN 46556, United States.

Keywords for this news article include: Indiana, Notre Dame, United States, Earthquake Engineering, North and Central America

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