中国铁道科学2012，Vol.33Issue(3)：21-27,7.DOI:10.3969/j.issn.1001-4632.2012.03.04
碳纤维与钢板复合加固钢筋混凝土梁裂缝的试验研究
Experimental Research on the Cracking Behavior of Reinforced Concrete Beams Combination Strengthened with Bonded CFRP and Steel Plate
摘要
Abstract
Through the flexural test of one reference beam, three combination strengthened beams and three CFRP reinforced beams, the cracking mechanism and the calculation of crack width of reinforced concrete beams combination strengthened with bonded CFRP and steel plate were studied. Study shows that the crack distance and crack width of strengthened beams are less than those of reference beams, but the secondary crack has increased. The crack growth rate of combination strengthened beams is slower than that of CFRP reinforced beams, which illustrates that combination reinforcement is better than CFRP reinforcement in the role of limiting crack. With the increase of service loading, the crack development speed of reinforcement beams accelerates, and the effect of limiting crack will reduce with it. The maximum crack width curve also appears mutations, which explains that service loading has reduced the effect on limiting crack. However, the service loading has less role of limiting crack on combination reinforcement than CFRP reinforcement. On the basis of traditional crack calculation theory, the adhesive correlation coefficients of combination strengthening and the influence coefficient of service loading are introduced to derive the formula for calculating the crack width of combination strengthened beam considering service loading and adhesive correlation coefficients. The calculation result of crack width is in good agreement with test result. The calculation method is simple and convenient and can be applied to engineering design.关键词
钢筋混凝土梁/复合加固/碳纤维/钢板/负载/裂缝间距/裂缝宽度/计算方法Key words
Reinforced concrete beam/ Combination strengthening/ Carbon fibers Steel plate/ Service loading/ Crack distance/ Crack width/ Calculation method分类
建筑与水利引用本文复制引用
熊学玉,徐海峰..碳纤维与钢板复合加固钢筋混凝土梁裂缝的试验研究[J].中国铁道科学,2012,33(3):21-27,7.基金项目
教育部高等学校博士学科点专项科研基金资助项目(20090072110051) （20090072110051）
上海市建设技术发展基金资助项目(B05043) （B05043）
上海市科委科技支撑计划(09231201102) （09231201102）
