碳纤维复材修复损伤钢筋混凝土梁抗弯性能试验研究
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摘要
通过对碳纤维复材(CFRP)修复钢筋混凝土损伤梁与未加固梁的抗弯性能试验,分析了CFRP修复对损伤梁在裂缝开展、承载能力、最大裂缝宽度以及挠度等方面的影响。试验结果表明:损伤梁在修复后,承载力和刚度都有显著提高,同时挠度和裂缝宽度有明显减小,说明采用CFRP修复损伤梁以提高其抗弯性能的方法是可行的。基于试验结果和理论研究基础对损伤修复梁的承载力进行了分析,计算结果与试验结果吻合较好。
The performance of the CFRP repair beam in terms of crack development,bearing capacity,maximum crack width and deflection was analyzed through the flexural behavior experiment CFRP repair of damage beam and comparison beam. The test results showed that: after repairing the damaged beam,the bearing capacity and stiffness were significantly improved,and the deflection and crack width were also significantly reduced. The method of using CFRP to repair the damaged beam was feasible. The calculated results were in good agreement with the experimental results.
The performance of the CFRP repair beam in terms of crack development,bearing capacity,maximum crack width and deflection was analyzed through the flexural behavior experiment CFRP repair of damage beam and comparison beam. The test results showed that: after repairing the damaged beam,the bearing capacity and stiffness were significantly improved,and the deflection and crack width were also significantly reduced. The method of using CFRP to repair the damaged beam was feasible. The calculated results were in good agreement with the experimental results.
引文
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[2]杨忆妍.浅谈老旧工业建筑的改造[J].绿色建筑,2010,2(5):44-48.
[3]王晨光.论城市既有工业建筑改造设计与评价[J].山西建筑,2014(20):16-18.
[4]李永梅,孙国富,杨庆山.适当提高钢筋混凝土结构设计安全度[J].中国安全科学学报,2003,13(2):60.
[5] EL-SHAFIEY T F,ETMAN E E,HUSSEIN M,et al. Behavior of Strengthened RC Beams using Different Techniques Under Static Loading[C]//International Conference on Advances in Structural and Geotechnical Engineering,Icasge. 2017.
[6] HUSSEIN M,AFEFY E D,KHALIL A K. Innovative Repair Technique for RC Beams Predamaged in Shear[J]. Journal of Composites for Construction,2013,17(6):1-8.
[7]钱伟,高丹盈.初始损伤对CFRP加固混凝土梁受弯性能的影响[J].四川建筑科学研究,2006,32(4):45-49.
[8]郭蓉,赵少伟,邓瑜,等.不同程度损伤混凝土梁加固后抗弯性能试验研究[J].建筑结构学报,2008(增刊1):203-207.
[9]中华人民共和国住房和城乡建设部.混凝土结构设计规范[M].北京:中国建筑工业出版社,2011.
[10]中国工程建设标准化协会.房屋裂缝检测与处理技术规程:CECS 293—2011[S].北京:中国计划出版社,2011.
[11]四川省住房和城乡建设厅.混凝土结构加固设计规范:GB50367—2013[S].北京:中国建筑工业出版社,2014.
[12]中华人民共和国住房和城乡建设部.纤维增强复合材料建设工程应用技术规范:GB 50367—2013[S].北京:中国计划出版社,2011.
[13]秦丽辉.玄武岩纤维布加固损伤混凝土梁力学性能研究[D].哈尔滨:哈尔滨工业大学,2013.
[14] RAHAI A R, SABERI M R. Experimental and Numerical Investigation of Damaged Concrete Beams Strengthened with FRP Composed of Different Fibres and Resins[J]. Structural Design of Tall&Special Buildings,2011,20(8):972-985.
[15] TUGHAR M S. Fiber Reinforced Polymer Repair Techniques for Reinforced Concrete Beams Pre-Damaged in Shear[J]. Chemistry&Materials Research,2013(5):35-41.
[16] TAHSIRI H,SEDEHI O,KHALOO A,et al. Experimental Study of RC Jacketed and CFRP Strengthened RC Beams[J].Construction&Building Materials,2015,95:476-485.