【摘要】 通过5根钢筋混凝土梁的变幅疲劳试验,研究碳/玻璃混杂、碳/玄武岩混杂纤维布加固梁的弯曲疲劳性能,并与玄武岩纤维布加固梁进行了比较。结果表明:在纤维布粘贴层数相同条件下,混杂纤维布加固梁的抗疲劳性能更优,疲劳寿命明显延长。在均方根等效载荷法的基础上,得到了变幅疲劳试验梁的S-N曲线数学表达式,可供工程设计参数。更多还原

【Abstract】 The variable amplitude test of BC beams was investigated with 5 specimens,in which the flexural fatigue behavior of RC beams strengthened with carbon/glass hybrid fiber sheets and carbon/basalt hybrid fiber sheets was studied,and compared with that of RC beams strengthened with basalt fiber sheets.Experimental results showed that the anti-faigue properties of RC beams stengthened with hybrid fiber sheets was better,and the fatigue life was significantly prologed.Based on the root mean square(RMS) method,the S-N curves formula on variable amplitude fatigue was proposed,which may be reference for the engineering design.更多还原