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    高本立      （江蘇省建筑科學(xué)研究院  南京 210008）

[提要]  根據(jù)現(xiàn)行規(guī)范對(duì)混凝土構(gòu)件正截面承載力計(jì)算的基本假定，推導(dǎo)了用碳纖維片材加固完全或部分卸載的混凝土構(gòu)件正截面受彎承載力的計(jì)算公式，討論了不同截面極限應(yīng)變類型時(shí)碳纖維片材強(qiáng)度的利用程度和碳纖維片材加固的適用范圍。
[關(guān)鍵詞]  正截面受彎承載力  基本假定  碳纖維片材  加固  卸荷  強(qiáng)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