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    張娟秀，葉見(jiàn)曙，姚偉發(fā)
    (東南大學(xué)交通學(xué)院，南京210096)

[摘要] 為研究粘貼加固混凝土梁疲勞性能，以評(píng)價(jià)粘貼加固技術(shù)的長(zhǎng)期加固效果，進(jìn)行了1根粘鋼加固梁、1根CFRP加固混凝土梁及1根對(duì)比梁的疲勞試驗(yàn)和非線性有限元分析。研究表明：在鋼板與混凝土粘結(jié)完好情況下，與CFRP加固相比，粘貼鋼板加固較大地提高了梁的剛度；與未加固梁相比，CFRP加崮混凝土梁的疲勞壽命提高了約54.8%，粘鋼加固梁疲勞壽命反而降低了15.2%。本次試驗(yàn)中CFRP加固的長(zhǎng)期加固效果比鋼板加固好。
[關(guān)鍵詞] 鋼筋混凝土梁；結(jié)構(gòu)加固；鋼板；CFRP；疲勞試驗(yàn)；有限元

    Fatigue behavior of the reinforced concrete beam strengthened with steel plate or CFRP
    Zhang Juanxiu, Ye Jianshu, Yao Weifa
    ( Transportation College of Southeast University, Nanjing 210096, China)

Abstract: In order to study the fatigue behavior of the reinforced concrete beams strengthened with steel plate or CFRP, and to assess the long-term effect of the strengthening technique, two beams strengthened with steel plate or CFRP and one contrasting beam were tested under fatigue loading. The main results obtained from the tests and the finite element analyses are: in the case of bond intact, bonded steel plate can improve the beam stiffness more obviously than the CFRP reinforcement; the fatigue life increases 54.8% after being strengthened with CFRP, and decreases 15.2% after being strengthened by steel plate; the CFRP reinforcement is more effective than the steel plate strengthening in this test.
Keywords: reinforced concrete beam; structure strengthening; steel plate; CFRP; fatigue test; finite element