Abstract
The importance of composite structure systems such as CFT in the building structure is being highlighted which led high-rise buildings, enlarged and long spanning. CFT is difficult to apply to the field due to the installation of the internal and external diaphragm. Therefore, this study developed concrete filled ㅍ-section column structure systems to solve the problem in accordance with conventional systems for CFT and evaluated structural performance of ㅍ-section steel column New shape weak-axis connection. Five specimens are built to test variables that thickness of welding plates and monotonic loading tests are performed. As the result, new shape weak-axis connection can adjust the strength and rigidity according to welding plate thickness.
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