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A numerical study on fire endurance of wood beams exposed to three-side fire

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第7期13卷 491-505页

作者： Jin ZHANG 1, Qing-feng XU2, Yi-xiang XU3, Bin WANG1, Jing-xiang SHANG1 (1Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China) (2Shanghai Key Laboratory of New Technology Research on Engineering Structure, Shanghai Research Institute of Building Sciences, Shanghai 200032, China) (3Department of Civil Engineering, Strathclyde University, Glasgow G12 8QQ, UK) Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Southeast University Nanjing China Shanghai Key Laboratory of New Technology Research on Engineering Structure Shanghai Research Institute of Building Sciences Shanghai China Department of Civil Engineering Strathclyde University Glasgow UK

To investigate the fire endurance of wood beams exposed to three-side fire, we conducted bearing capacity tests of two wood beams and experiments of five wood beams exposed to three-side fire. The finite element software ANSYS was also used to predict the fire endurance of those beams with the indirect order coupling method. It was found that the fire endurance decreases as the load level increases, and the reduction ratio tends to decrease. In the case of a certain load level, the fire endurance is improved if the section size is increased or covered by the fire protection coating. The central deformation increases as the fire duration increases, and the ratio of increase tends to rise. On another note, an increase in the density of wood leads to a rise in the fire endurance of a given beam. From the finite element method (FEM) calculation results, the fire endurance decreases as the load level increases, and the reduction ratio tends to decrease. When the load level is greater than 0.5, the fire endurance is significantly reduced, and it does not change significantly when the load level changes. Lastly, for a load level magnitude below 0.5, the fire endurance and load level are proportional to one another.

关键词： Three-side fire fire endurance Load level fire prevention measures Finite element analysis Density of wood

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Analysis of fire Hazard and Protection in Ancient Buildings:The Case of Hangzhou

Analysis of Fire Hazard and Protection in Ancient Buildings:...

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第三届教学管理与课程建设学术会议

作者： Quansheng Kang 1 , Zhenming Li 1 , Lili Zhao 1 , Yanneng Chen 1 , Xiaoge Zhen 1 1 Institute of Safety Engineering Technology, Zhejiang University of Technology, Hangzhou, China

Ancient buildings are great treasures for our nation, and it is important to be prevented from damaged by fire accidents. Since they are complex in construction and often built far from the town with particular buildings materials, the fire development on them is very different from normal buildings. In this paper, the ancient buildings of important historical and heritage value in Hangzhou were investigated through fire risk analysis method. The fire threat of ancient buildings is discussed and analyzed based on the present situation of ignition source control, fire control facilities, evacuation installations and fire protection management. The various factors that affect the level of fire risk of ancient buildings are analyzed by a qualitative fire risk assessment method. A series of remedial measures are proposed for fire prevention and control of ancient buildings, such as control of combustible, removing the fire hazards, fire fighting strategy and fire protection management.

关键词： ancient building fire hazard safety potential fire prevention measures

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