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http://dx.doi.org/10.12989/scs.2016.20.6.1221

Cyclic and static behaviors of CFT modular bridge pier with enhanced bracings  

Kim, Dongwook (Department of Civil Engineering, Chung Ang University)
Jeon, Chiho (Department of Civil Engineering, Chung Ang University)
Shim, Changsu (Department of Civil Engineering, Chung Ang University)
Publication Information
Steel and Composite Structures / v.20, no.6, 2016 , pp. 1221-1236 More about this Journal
Abstract
Modular structures consist of standardized modules and their connections. A modular bridge pier is proposed to accelerate bridge construction. Multiple concrete-filled steel tubes (CFTs) using commercial steel tubes were chosen as the main members. Buckling restrained bracings and enhanced connection details were designed to prevent premature low-cycle fatigue failure upon cyclic loading. The pier had a height of 7.95 m, widths of 2.5 m and 2.0 m along the strong and weak axis, respectively. Cyclic tests were performed on the modular pier to investigate structural performance. Test results showed that four CFT columns reached yielding without a premature failure of the bracing connections. The ultimate capacity of the modular pier was reasonably estimated based on the plastic-hinge-analysis concept. The modular CFT pier with enhanced bracing showed improved displacement ductility without premature failure at the welding joints.
Keywords
modular bridge pier; CFT; buckling restrained bracing; cyclic test; ductility;
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Times Cited By KSCI : 2  (Citation Analysis)
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