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Earthquakes and Structures Volume 5, Number 3, September 2013, pages 261-276 DOI: http://dx.doi.org/10.12989/eas.2013.5.3.261 |
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Simultaneous optimal damper placement using oil, hysteretic and inertial mass dampers |
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Yu Murakami, Katsuya Noshi, Kohei Fujita, Masaaki Tsuji and Izuru Takewaki
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| Abstract | ||
| Oil, hysteretic and inertial mass dampers are representatives of passive dampers used for smart enhancement of seismic performance of building structures. Since oil dampers have a nonlinear relief mechanism and hysteretic dampers possess nonlinear restoring-force characteristics, several difficulties arise in the evaluation of buildings including such dampers. The purpose of this paper is to propose a practical method for simultaneous optimal use of such dampers. The optimum design problem is formulated so as to minimize the maximum interstory drift under design earthquakes in terms of a set of damper quantities subject to an equality constraint on the total cost of dampers. The proposed method to solve the optimum design problem is a successive procedure which consists of two steps. The first step is a sensitivity analysis by using nonlinear time-history response analyses, and the second step is a modification of the set of damper quantities based upon the sensitivity analysis. Numerical examples are conducted to demonstrate the effectiveness and validity of the proposed design method. | ||
| Key Words | ||
| optimal damper placement; multiple dampers; variable adaptive step length; nonlinear damper; simultaneous optimization | ||
| Address | ||
| Department of Architecture and Architectural Engineering, Kyoto University. Kyotodaigaku-Katsura, Nishikyo-ku, Kyoto 615-8540, Japan | ||