不同纤维布加固的钢筋混凝土结构变形行为比较

Comparison of deformation behavior of reinforced concrete structures reinforced with different fiber cloths

为了提升钢筋混凝土结构的承载能力和变形能力,共设计了1种未加固和4种纤维布加固的混凝土试件,对比分析了未加固试件和纤维布加固混凝土试件的破坏形貌、荷载-应变曲线等。结果表明,纤维布加固混凝土试件的峰值应力从大至小顺序为CFRP、NFRP、JFRP、GFRP、未加固试件,横向最大拉应变从大至小顺序为JFRP、NFRP、GFRP、CFRP、未加固试件,横向最大拉应变从大至小顺序为JFRP、NFRP、GFRP、CFRP、未加固试件。未加固和CFRP加固试件的破坏呈脆性破坏特征,而GFRP、JFRP和NFRP试件的破坏呈延性破坏特征。且CFRP试件的最大荷载最大,JFRP加固试件的位移最大,纤维布加固混凝土试件的承载能力和变形能力都要优于未加固试件。

In order to improve the bearing capacity and deformation capacity of reinforced concrete structures,a total of 1 unreinforced and 4 fiber cloth reinforced concrete specimens were designed,and the failure morphology and load-strain curves of the unreinforced specimens and the fiber cloth reinforced concrete specimens were compared and analyzed.The results showed that the peak stress of fiber-reinforced concrete columns is in the order of CFRP、NFRP、JFRP、GFRP、unreinforced specimens,the maximum transverse tensile strain is in the order of JFRP、NFRP、GFRP、CFRP、unreinforced specimens.The failure of unreinforced and CFRP reinforced specimens exhibited brittle failure characteristics,while the failure of GFRP,JFRP,and NFRP specimens exhibited ductile failure characteristics.The maximum load of CFRP specimens was the highest,while the displacement of JFRP reinforced specimens was the highest.Fiber-reinforced concrete columns had better bearing capacity and deformation capacity than those of unreinforced columns.