新型BFRP布约束RC柱轴心抗压试验研究

进行21根FRP布约束加固RC圆柱（9根BFRP布包裹、9根CFRP布包裹和3根RC圆形截面短柱）的轴心抗压试验,研究了圆柱在包裹不同的FRP布种类和层数下的破坏特征和力学性能,对横向应变、柱截面的应变和极限承载力等进行了分析.结论是：两种纤维布加固后的RC柱的承载力有明显提高,CFRP布的承载力比BFRP布的高,但差别不大;同时延性也有不同程度的提高;CFRP布的应变比BFRP布的大;包裹层数越多加固效果越好.结论：采用纤维布约束加固RC柱后力学性能有明显改善.这一结果为BFRP的进一步研究提供理论基础,并可用于指导工程实践.

Axial Compression Test Study of RC Columns Bound with BFRP Sheet

In the comparative test,21 circular RC columns are used,in which 9 are constrained with BFRP,9 with CFRP,and 3 others are not wrapped.As parameters to the kinds and layers of the fiber cloth,the lateral strains and longitudinal strain of the columns full wrapped are analyzed.The results show that,the capacity of the RC columns reinforced with two kinds of fiber cloth improves obviously,the capacity of CFRP is higher than BFRP,while with little difference;the ductility increases in varying degrees,and the strain of CFRP is bigger than BFRP,the reinforcement effect of the columns is better than the columns wrapped with less layers wrapped.The conclusions are： the mechanical properties of the RC columns reinforced with fiber cloth enhance distinctly,which could provide theoretical basis for further study of BFRP,and be used to guide engineering practice.