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http://dx.doi.org/10.7781/kjoss.2014.26.6.549

Development of Buckling Restrained Brace Laterally Supported by Semicircular Springs  

Park, Keum Sung (Korea Institute of Civil Engineering and Building Technology)
Lee, Sang Sup (Korea Institute of Civil Engineering and Building Technology)
Hong, Sung Yub (Korea Institute of Civil Engineering and Building Technology)
Bae, Kyu Woong (Korea Institute of Civil Engineering and Building Technology)
Publication Information
Journal of Korean Society of Steel Construction / v.26, no.6, 2014 , pp. 549-558 More about this Journal
Abstract
Buckling restrained braces(BRBs) developed as a seismic protection element, hysteretic damper, have been investigated in America and Japan mainly. BRBs are composed of a steel core and concrete-filled steel casing. It is one of the major causes of drop in productivity to fill the steel casing with concrete. To improve this problem, the BRB is introduced in which the steel core is restrained with a pair of semicircular springs. In this paper, the numerical and analytical investigation about the desirable configuration for a semicircular spring is presented. Firstly, the stiffness and strength of semicircular spring is determined theoretically to buckle into a very high-order modes. Then, the required stiffness and strength are calculated under the practical design conditions and considered as reference values to find a proper configuration. The material strength and thickness of semicircular spring are chose from the finite element analysis for 5 semicircular springs with varying height. Finally, the nonlinear buckling analysis of BRB with proper semicircular springs shows that the bucking strength of the whole BRB is very similar to the strength of steel core with length between semicircular springs.
Keywords
Buckling restrained brace; Dry process; Spring support; Stiffness; Nonlinear buckling analysis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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