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Seismic Behavior of Concrete-Filled HSS Bracing Members Reinforced by Rib  

Han, Sang Whan (한양대학교 건축공학부)
Yeo, Seung Min (한양대학교 건축공학과)
Kim, Wook Tae (한양대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.17, no.1, 2005 , pp. 53-62 More about this Journal
Abstract
The purpose of this study is to improve the seismic behavior of the bracing members. Lee and Goel's (1987) concrete filling in the hollow structural section (HSS) reduced the severity of local buckling and increased the fracture life. However, concrete filling in the HSS did not prevent the occurrence of local buckling in the midsection of the bracing member, which resulted in continuous strength degradation. This study investigated the seismic behavior of the concrete-filled HSS bracing member, which is reinforced by ribs in the midsection of the bracing member. The main variable of the specimens is rib length. The test results showed that buckling mode, cyclic compression strength, and energy dissipation capacity of the bracing members were affected by rib length. Specimen reinforced with ribs with a length of 63% had better structural performance.
Keywords
HSS bracing member; local buckling; concrete filling; rib;
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