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（中南大學(xué)土木建筑學(xué)院 長(zhǎng)沙   410075）
【提要】 對(duì)內(nèi)嵌FRP加固矩形截面梁的三種彎曲破壞形式（鋼筋屈服前混凝土壓碎、鋼筋屈服后混凝土壓碎和鋼筋屈服后FRP拉斷）和兩種界限破壞情形（鋼筋屈服時(shí)混凝土壓碎和FRP拉斷時(shí)混凝土壓碎）進(jìn)行了極限狀態(tài)分析，提出了各種彎曲破壞極限狀態(tài)相應(yīng)的承載力計(jì)算公式和界限條件，其計(jì)算結(jié)果與作者及國(guó)外已有試驗(yàn)實(shí)測(cè)值吻合較好。
【關(guān)鍵詞】 FRP 內(nèi)嵌 加固 鋼筋混凝土 受彎承載力 破壞形態(tài)
Prediction of Flexural Capacities for RC Beams Strengthened with NSM FRP Reinforcement
/Zhou Chaoyang, Xiang Chuanjia, He Xuejun (School of Civil Engineering and Architecture, Central South University, Changsha 410075, China)
Abstract:Three bending failure modes (concrete crush before steel yield, concrete crush after steel yield, FRP break after steel yield) and two ultimate limit states of bending failure (steel yield and concrete crush at the same time, FRP break and concrete crushed at the same time) are discussed for reinforced concrete beams strengthened with nearsurfacemounted fiberreinforcedplastics. The expressions are derived for their flexural capacities and the predicted results are in good agreement with the measured ones from tests of the author and other investigators abroad.
Keywords:FRP; near surface mounted; strengthening; reinforced concrete; flexural capacity; failure mode