CFL加固RC梁裂纹扩展的实验研究  

Experimental Study on Crack Growth of RC Beam Strengthened with CFL

作　　者：林荣伟[1] 黄培彦[1] 郭馨艳[1] 周绪平[1] 

机构地区：[1]华南理工大学土木与交通学院,广州510640

出　　处：《科学技术与工程》2009年第16期4607-4610,4629,共5页Science Technology and Engineering

基　　金：国家自然科学基金(10672060);广东省自然科学基金(07006538)资助

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。Experimental study on crack growth of RC structure strengthened with CFL is very important to theresearch of fatigue performance and durability. 5 RC beam strengthened with CFL was carry on fatigue experimentunder cycle loading, the process of crack growth was observed, the loading and deflection was recorded. By analy-zing the test data, the semiempirical relatiansip was obtained. The result of linear fitting indicate excellent linearrelativity between the logarithm of crack growth and the logarithm of compliance calibration.

关 键 词：纤维增强塑料(FRP) 裂纹扩展 实验研究 加固 碳纤维薄板(CFL) 

分 类 号：O346.2[理学—固体力学]