薄钢管-防火涂料-CFRP修复受损钢筋混凝土柱的抗火性能试验研究

Fire resistance of damaged ferroconcrete column repaired with thin steel tube-fire retardant coating-CFRP : An experimental study

为研究完全破坏的钢筋混凝土柱子修复和增强其防火性能,利用高温燃烧炉对四面受火的试件高温下性能探究分析,将所得到的结果与钢筋混凝土柱子的计算承载力进行比较。使用薄钢管-防火涂料-CFRP共同加固完全破坏的钢筋混凝土柱子,得到了钢筋混凝土柱子的力学加固方法和抗火加固方法。得到结论:试件的耐火时间为3 h,证明这种加固方法不仅提高了试件常温的承载能力而且还使得试件具有优越的抗火性能。

T o stu dy the strength an d f ire-resistance of completely d amaged reinforced co ncrete column , the perform ance of thereinforced concrete co lumn that had been bak ed under high temperature w as analy zed. T he resul ts w ere comp ared w i th the calculatedb earin g cap aci ty of a norm al reinforced concrete column. A com pletely d amaged rein forced concrete co lumn w as repaired w i th a thinsteel tu be, f ire retardant co ating and C F R P to im prov e i ts mechanical strength and f ire-resistance. T h e resul ts show that thef ire-resistan t time of the repaired colum n reach es 3 h . I ts b earin g capaci ty at normal and high tem perature is also satisfactory.