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서수연 ( Seo Soo-yeon ),조태섭 ( Cho Tae-seup ),윤승조 ( Yoon Seung-joe ),최기봉 ( Choi Ki-bong ) 한국구조물진단유지관리공학회 2008 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.12 No.1
This paper presents thermal analysis on the RC column under constant axial force simulating low part of medium height frame building. Material property of concrete and reinforcement for the thermal loading is reviewed from various papers. 2D nonlinear model for example column with 30mm of cover thickness is established in ADINA progam and several analyses are performed. Main parameters in the analysis are the variation of concrete strength and direction of thermal loading. 24MPa, 45MPa and 60MPa are prepared for concrete strength. Uniformally distributed loading and reversed triangle loading for both sides are considered. And analysis for the case of thermal loading only for one side is also dealt with. Analysis result showed that the required fire resisting time of the example column closer to 60 minute which is calculated from the axial deformation due to the thermal loading. The reinforcement reaches to the it's yield strength at 40 minute while concrete didn't arrive to it’s compressive strength until 110 minute.