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Zhan-Fei Huang,Wee-Siang Toh,Kang-Hai Tan,Guan-Hwee Phng 한국강구조학회 2007 International Journal of Steel Structures Vol.7 No.3
This paper presents an experimental study for investigating the effects of load level on structural behaviour of fourunprotected, embedded I-section steel composite columns. Each column was subjected to a constant axial compression forceunder rising temperature. Two electric furnaces were used to aply four-face heating condition on the columns to aproximatea realistic fire. All columns were made of siliceous concrete of normal cylinder strength around 44 MPa. Numerical analysesThecolumn failure times were also compared with design code predictions from EC4 Pt.1.2. It shows that the failure times reducedlinearly under an increasing load level. It was observed that all specimens underwent concrete spalling at the mid-height zone.