An experimental study of the behavior of dual steel systems

An experimental study of the behavior of dual steel systems - Printable Version

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An experimental study of the behavior of dual steel systems - arshiakh - 04-07-2013

This report presents and compares the behavior of 0.3-scale models of a concentrically braced dual system (CBDS) and an eccentrically braced dual system (EBDS). These two six-story systems were tested on the earthquake simulator at the Univ. of California at Berkeley as part of the U.S.-Japan Cooperative Earthquake Research Program. The models were similitude-scaled replicas of full-scale test structures that were pseudodynamically tested at the Building Research Inst. in Tsukuba, Japan. The performances of the two models are compared for minor, moderate, and severe earthquake shaking. The roles of the ductile moment-resisting space frames in both models are studied, and recommendations are made regarding their minimum stiffness and strength requirements, in CBDSs and EBDSs, respectively. Response modification factors are currently used by the Applied Technology Council (ATC) and the Structural Engineers Assn. of California (SEAOC) to derive design response spectra from an assumed linear elastic design response spectra. The values of the factors used for CBDSs and EBDSs are reviewed in this report. Finally, a rational procedure for the design of steel structures sited in regions of high seismic risk is presented.

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