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Temperature analysis on fire resistance experiments of partially encased beams

机译：部分包裹梁的耐火试验温度分析

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Twelve fire resistance tests, grouped in four series, were developed using partially encased beams (PEB) without concrete slab, for different load level and shear connection. PEB were built with standard hot rolled IPE100 profile and reinforced concrete between flanges. Fire resistance was determined for standard ISO834 nominal heating curve, using small fire resistance furnace and portal frame. Temperature was measured in three different sections along PEB length, for three different materials (steel, concrete and reinforcement). Average temperature in each section and material was compared to the average over length temperature. Each series presented similar results, with good reproducibility. Special focus was given to critical temperature. The maximum temperature difference between sections SI, S2, S3 and the average element length temperature is smaller than 3.2% for test series 1. For test series 2, 3 and 4 the maximum temperature difference is smaller than 5.1%, 6.3% and 11.2%, respectively. Temperature is not uniform in cross-section. After the initial heating stage, temperature revealed a constant difference of approximately 150℃ between temperatures measured inside and outside, defining two main temperature evolutions. Temperatures measured outside revealed always higher temperature level.
机译：使用不带混凝土板的部分包封梁（PEB）进行了十二个耐火试验，分为四个系列，分别用于不同的载荷水平和剪切连接。 PEB采用标准热轧IPE100型材和法兰之间的钢筋混凝土建造。使用小型耐火炉和门架确定了标准ISO834标称加热曲线的耐火性。对于三种不同的材料（钢，混凝土和钢筋），沿着PEB长度在三个不同的部分测量温度。将每个部分和材料的平均温度与平均长度温度进行比较。每个系列均显示相似的结果，并具有良好的可重复性。特别关注临界温度。测试系列1的S1，S2，S3部分之间的最大温度差和平均元件长度温度小于3.2％。对于测试系列2、3和4，最大温度差小于5.1％，6.3％和11.2％ ， 分别。横截面温度不均匀。在初始加热阶段之后，温度显示出内部和外部测得的温度之间存在大约150℃的恒定差，从而定义了两个主要的温度变化。外部测得的温度始终显示较高的温度水平。

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