【摘要】 对纤维增强塑料(Fiber Reinforced Polymer,简称FRP)加固钢筋混凝土(RC)构件的疲劳主裂纹扩展规律进行了实验研究,其疲劳性能及耐久性的研究具有重要意义。对5根碳纤维薄板(CFL)加固RC梁进行常幅疲劳实验,观察其裂纹扩展的整个过程。记录裂纹扩展及荷载挠度变化数据,分析了构件在常幅荷载作用下其裂纹扩展的规律。通过对试验数据的拟合,得到了裂纹扩展速率的半经验公式。拟合结果表明,裂纹扩展速率的对数与柔度变化的对数具有良好的线性相关性。更多还原

【Abstract】 Experimental study on crack growth of RC structure strengthened with CFL is very important to the research of fatigue performance and durability. 5 RC beam strengthened with CFL was carry on fatigue experiment under cycle loading,the process of crack growth was observed,the loading and deflection was recorded. By analyzing the test data,the semiempirical relatiansip was obtained. The result of linear fitting indicate excellent linear relativity between the logarithm of crack growth and the logarithm of compliance calibration.更多还原