- 摘 要
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(1 江蘇省建筑工程質(zhì)量檢測中心有限公司，南京 210008；
2 華僑大學土木工程學院，廈門 361021； 3 廈門城市職業(yè)學院，廈門 361008)
［摘要］通過對10根鋼筋混凝土梁進行靜載試驗，研究分析了鋼筋銹蝕率和鋼纖維摻量對試驗梁的承載力、荷載-撓度曲線、鋼筋和混凝土應(yīng)變等的影響。試驗結(jié)果表明：隨著鋼筋銹蝕率的增大，試驗梁的極限承載力和剛度均明顯降低，屈強比增大，鋼筋與混凝土正截面平均應(yīng)變不再符合平截面假定。由于鋼纖維的增強和阻裂作用，銹蝕鋼筋鋼纖維混凝土梁的受力性能優(yōu)于銹蝕鋼筋混凝土梁的，對于提高鋼筋混凝土構(gòu)件的耐久性有積極作用。
［關(guān)鍵詞］銹蝕鋼筋混凝土梁；鋼纖維；靜力性能
Experimental research on static mechanical behavior of corroded reinforced concrete beams with steel fiber
Song Xiaolei1, Zeng Zhixing2, Wu Xiaobin3
(1 Jiangsu Testing Center for Quality of Construction Engineering Co., Ltd., Nanjing 210008, China; 2 School of Civil
Engineering of Huaqiao University, Xiamen 361021, China; 3 Xiamen City University, Xiamen 361008, China)
Abstract:Through the static load test for 10 reinforced concrete (RC) beams, the influences of the steel bar corrosion rate and the quantity of steel fiber on capacity, load-deflection curve, strains of reinforced bars and concrete and so on, were analyzed. The test results indicate that with the steel bar corrosion rate increases, bearing capacity and stiffness of the tested beams reduce obviously, and the tensile ratio increases. The normal section average strains of steel bars and concrete no longer meet the plane section assumption. Owing to the strength and crack resistance of steel fiber, the performance of corroded reinforced steel fiber concrete beams is superior to the performance of corroded RC beams. The steel fiber has positive effect to improve the durability of RC structures.
Keywords:corroded reinforced concrete beams; steel fiber; static mechanical behavior
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