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利用自制的火灾试验炉进行了11个型钢混凝土试件在恒高温下的推出试验。重点分析了型钢加载值与滑移量之间的关系、试件裂缝及其发展特征等内容。结果表明:随着试验温度的升高,型钢混凝土的极限滑移荷载与残余荷载相对于其在常温下的数值均有大幅下降,在20~200℃时下降最快,200℃之后滑移荷载的下降趋势较为平缓。随着试件所受温度升高,加载过程中出现裂缝的部位增多。试验中高温下试件的初始滑移量高于常温下试件的,随温度的变化其在2.5~3mm范围内波动。
Using homemade fire test furnace 11 steel concrete specimens were launched at constant high temperature test. Focusing on the steel load value and the relationship between the amount of slippage, specimen crack and its development characteristics and so on. The results show that with the increase of test temperature, the ultimate slip load and residual load of SRC decrease sharply at room temperature, decrease fastest at 20 ~ 200 ℃, and slip load after 200 ℃ The downward trend is more moderate. As the temperature of the specimen increases, the location of cracks in the loading process increases. In the experiment, the initial slippage of specimen at high temperature is higher than that at room temperature, and fluctuates in the range of 2.5 ~ 3mm with the change of temperature.