[提要]  根据6个碳纤维布加固混凝土柱和2个破坏后加固混凝土柱在反复荷载作用下抗震性能的试验结果，分析了碳纤维布对混凝土的约束和增加延性的作用，提出了碳纤维布有效约束系数的概念，从而使得碳纤维加固混凝土柱的抗震设计可直接套用混凝土结构的有关方法。
[关键词]  碳纤维布  抗震加固  混凝土柱  延性  有效约束系数

Eight specimens, including two strengthened after yielding to imitate strengthening with some damage and one strengthened under a sustained axial load to imitate strengthening under service, were tested under constant axial load and lateral cyclic load to investigated seismic performance of RC columns strengthened with carbon fiber reinforced polymer sheet ( CFRP sheet). The ductility increment with the confinement of CFRP sheet was studied. Based on the experimental results, an effective confinement factor of CFRP was suggested. Thus, the seismic design method of current code can be directly used in determining seismic strengthening amount of CFRP sheet for RC column.
Keywords: CFRP sheet; seismic strengthening; RC column; design method; effective confinement factor