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对纤维加强聚合物(FRP)材料加强钢筋混凝土梁在火灾中的防火性能进行了研究。试验结果显示,防火材料能够帮助构件达到标准防火性能,同时对不断增长的FRP应用也很重要。介绍了不同文献对FRP在高温下的性能所做的研究以及目前标准对建筑构件的耐火极限要求。对两个大型试验进行了介绍。试验材料为混凝土梁构件,外部用FRP板加强,并且三分之二用专利耐火隔热材料保护。给出了试验结果,并重点强调了曝火状态下所测得的构件温度。试验数据验证了热传导数值模型,该模型可用于预测加强并绝缘钢筋混凝土梁构件内的温度。试验结果和模型数据显示,正确设计和进行绝缘保护的FRP加强梁构件耐火极限能够达到4h或者以上。
The fire resistance of reinforced concrete beams reinforced with fiber reinforced polymer (FRP) was studied. Test results show that fire protection materials can help to achieve the standard components of fire performance, but also for the growing application of FRP is also very important. The research on the performance of FRP under high temperature and the current standards on the fire resistance of building components are introduced. Two large trials were introduced. The test material is a concrete beam member, the exterior is reinforced with a FRP board, and two thirds is protected with a patented refractory insulation. The experimental results are given and the temperature of the component measured under exposure is emphasized. The experimental data validate a numerical model of heat transfer that can be used to predict the temperature in reinforced and insulated RC beams. Experimental results and model data show that FRP-reinforced beam members with a properly designed and insulated insulation can withstand a fire limit of 4 h or more.