高本立      （江苏省建筑科学研究院  南京 210008）

[提要]  根据现行规范对混凝土构件正截面承载力计算的基本假定，推导了用碳纤维片材加固完全或部分卸载的混凝土构件正截面受弯承载力的计算公式，讨论了不同截面极限应变类型时碳纤维片材强度的利用程度和碳纤维片材加固的适用范围。
[关键词]  正截面受弯承载力  基本假定  碳纤维片材  加固  卸荷  强度利用率

On the basis of the basic supposals for the normal section bearing capacity of concrete members defined by the current code, the formulas for calulating the normal section bending bearing capacity of concrete members strengthened with CFRP and unloaded completely or partially are deduced. The utilization ratio of the CFRP's strength for different section strain types in ultimate state and the applied limits of CFRP are also discussed herewith.
Keywords:  normal section; bearing capacity; CFRP; strengthening; unload; strength; utilization ratio