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《Fire Science and Technology》 2010-01
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Accurate calculating method for temperature distribution of fire-damaged reinforced concrete T-beams

XIANG Kai1,WANG Guo-hui1,LU Zhou-dao2,ZHAO Bi1 (1.Tianjin Fire Research Institute of MPS,Tianjin 300381,China;2.Fire Research Institute of Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)  
In order to research the temperature distribution of reinforced concrete T-beams after the effect of standard fire curve two fire tests were implemented,and the heating time was 60 minutes and 75 minutes.The 3-D/2-D thermal conduction differential equation is introduced.The mixed method of finite element and finite difference is used to calculate the temperature distribution of T cross-section,which Considers of the material properties and water properties,can fit the test result better.The results show that the temperature distribution of flange plate is similar to one side fire-damaged slab,and the temperature distribution of web was similar to three side fire-damaged rectangular beams;for the web,the highest temperature was at the corner and the largest temperature gradient was under the flange plate.
【Fund】: 国家自然科学基金项目“火灾(高温)下值筋后锚固的抗火性能”(50778134)
【CateGory Index】: TU375
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