制震ダンパーとしての座屈拘束ブレースの要求性能 [in Japanese] Required Performances for Buckling-Restrained Braces as a Structural Control Damper [in Japanese]
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Required performances for buckling-restrained brace (BRB) used as a structural control device are examined. BRBs are now extensively used to control the seismic demand (response) of building structures in Japan. However a few studies have so far been made on BRBs installed in bridge structures. In this paper, an outline of BRBs is first described, followed by a presentation of a numerical model for determining the elasto-plastic cyclic behavior of BRBs. Then, an attempt is made to substantiate the numerical approach by comparing its results with some experimental results. Lastly, a list of six important required performances are presented,some of them being examined numerically. As a result, empirical formulas have been proposed for (a) limit of spacing between the bracing and restraining member and (b) contact force transmitted to the restraining member.
構造工学論文集 (50A), 527-538, 2004-03