Allocation and slip load of friction dampers for a seismically excited building structure based on storey shear force distribution

In this study, a seismic design methodology of the friction dampers based on the storey shear force distribution of an elastic building structure is proposed. First, using two normalization methods for the slip-load of a friction damper, numerical analysis of various single degree-of-freedom (SDOF) systems is performed. From this analysis, the effect of the slip-load and brace stiffness is investigated and optimal stiffness ratios of the brace versus primary structure are found. Second, from the numerical analysis for five multistorey building structures of different natural periods and numbers of story, reasonable decision method for the total number of installation floors, location of installation and distribution of slip-loads are drawn. In addition, an empirical equation on the optimal number of installation floor is proposed. Finally, the superiority of the proposed method compared to the existing design method is verified from numerical analysis.

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