低锈蚀率钢筋混凝土梁疲劳性能试验研究

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基金项目:

国家自然科学基金资助项目(50879034)

RESEARCH ON FATIGUE BEHAVIOR OF CONCRETE BEAMS WITH SLIGHT CORROSION REINFORCEMENT

1.
Department of Civil Engeering,Nanjing University of Aeronautics and Astronautics,Nangjing 210016,China

摘要: 对5根低锈蚀率钢筋混凝土梁进行疲劳试验，研究钢筋锈蚀率和应力比对循环荷载下锈蚀钢筋混凝土梁跨中挠度、裂缝宽度和疲劳寿命的影响。研究表明：低锈蚀率钢筋混凝土梁的跨中挠度比未锈蚀钢筋混凝土梁小；锈蚀钢筋混凝土梁的最大裂缝宽度随应力比增大而减小；锈蚀钢筋混凝土梁疲劳寿命随应力比增大而增大。研究结果可为锈蚀钢筋混凝土梁的研究和评估提供参考。
- 混凝土梁 /
- 疲劳性能 /
- 钢筋锈蚀率 /
- 应力比
Abstract: The fatigue test of five concrete beams with slight corrosion reinforcement has been made.The influence of weight loss ratio of reinforcement and stress ratio on the deflection of midspan,maximal crack width and fatigue life of concrete beams has been investigated.Research results show that the midspan deflection of slight corroded beams is lower than that of the non-corroded beams,the maximal crack width of a corroded beam is decreased with an increase in stress rato and the fatigue life is increased with the increase in stress ratio.The experimental results are helpful to the research and assessment of concrete beams with slight corrosion reinforcement.
- concrete beam /
- fatigue behavior /
- weight loss ratio of reinforcement /
- stress ratio