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简要介绍了6根足尺的钢筋混凝土梁火灾试验情况。火灾后用碳纤维布和粘钢加固其中各2根梁,然后分别对加固后的梁和未加固的对比梁进行单调加载的静载试验,观测比较梁发生破坏的全过程。通过对静载试验结果进行分析发现,碳纤维布加固和粘钢加固能够明显提高火灾后钢筋混凝土梁的极限承载力,碳纤维布加固能够明显提高火灾后钢筋混凝土梁的强屈比和延性系数,提高梁的变形能力,从而改变梁受火后的破坏形态。
A brief introduction of 6 full scale reinforced concrete beams fire test situation. Fire after the use of carbon fiber cloth and stick steel to strengthen each of the two beams, and then respectively reinforced beam and unbonded contrast monotonic load static load test, observed and compared the whole process of beam damage. Through the analysis of the static load test results, it is found that the carbon fiber reinforced and steel-bonded reinforcement can significantly increase the ultimate bearing capacity of reinforced concrete beams after fire, and the reinforcement of carbon fiber cloth can significantly improve the strength ratio and ductility of reinforced concrete beams after fire Deformation capacity of the beam, thereby changing the beam damage morphology after fire.