Behavior of Unbonded Braces Restrained by Reinforced Concrete and FRP

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by Nobuyoshi Ando, Musashi Inst of Tech., Tokyo, Japan,
Shunran Takahashi, Musashi Inst of Tech., Tokyo, Japan,
Keito Yoshida, Musashi Inst of Tech., Tokyo, Japan,

Document Type: Proceeding Paper

Part of: Composite Construction in Steel and Concrete II:

Abstract: A new composite steel brace called an unbonded brace (UB) is proposed to enhance the capacity of a steel brace to carry a compressive load of almost up to the yield strength of the steel brace without changing of its rigidity. The failure mechanism of the UB is investigated and equations for practical design are proposed based on the consideration of secondary stresses. The results obtained by the proposed equations are verified through a series of experiments. Finally, effects of reinforcement ratio to the ductility of the UB with Reinforced Fiber Plastic (UBF) are studied through a couple of experiments.

Subject Headings: Bracing | Steel structures | Load bearing capacity | Strength of materials | Fiber reinforced polymer | Concrete structures | Steel | Reinforced concrete |

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