组合粘贴纤维增强复材抗弯加固35 m T型梁破坏性试验研究
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摘要
针对1座高速公路旧桥拆除的35 m预应力混凝土T型梁开展组合粘贴纤维增强复材(HBFRP)加固施工,并总结了施工过程中各项技术控制要点。基于加固后桥梁开展破坏性荷载试验,结果表明:荷载-位移曲线呈线性双折线变化,线性拟合得到跨中部位两阶段荷载-挠度关系; HB-FRP板参与全过程抗弯,未发生黏结滑移破坏。
The 35 m prestressed concrete T-beam removed from the old bridge of a highway was constructed with HBFRP reinforcement,and the technical control points during the construction process were summarized. Based on the destructive load test of the bridge after reinforcement,the test results show that the load-displacement curve shows a linear double-fold line change,and the linear fitting results in the load-deflection relationship of the mid-span; the HB-FRP plate does not have the bond-slip damage,and participates in the whole process. Resistance to bending.
The 35 m prestressed concrete T-beam removed from the old bridge of a highway was constructed with HBFRP reinforcement,and the technical control points during the construction process were summarized. Based on the destructive load test of the bridge after reinforcement,the test results show that the load-displacement curve shows a linear double-fold line change,and the linear fitting results in the load-deflection relationship of the mid-span; the HB-FRP plate does not have the bond-slip damage,and participates in the whole process. Resistance to bending.
引文
[1] WU Y F,HUANG Y. Hybrid Bonding of FRP to Reinforced Concrete Structures[J]. Journal of Composites for Construction,2008,12(3):266-273.
[2] YUN Y C,WU Y F,TANG W C. Perfromance of FRP Bonding Systems Under Fatigue Loading[J].Engineering Structures,2008,26(4):1-12.
[3]颜俊辉．FRP混合粘贴技术加固混凝土梁的试验研究[D]．长沙:湖南大学，2009.
[4]张峰，徐向锋，李术才．HB-FRP加固RC梁的精细有限元分析[J]．哈尔滨工业大学学报，2015,27(8):125-128.
[5]张峰，牛平霞，李树忱．FRP-螺栓联合加固RC梁粘结性能试验研究[J]．土木建筑与环境工程，2010,32(6):7-13.
[6] ZHOU Y Z,GOU M K,ZHANG F Y,et al. Reinforced Concrete Beams Strengthened with Carbon Fiber Reinforced Polymer by Friction Hybrid Bond Technique:Experimental Investigation[J].Material and Design,2013,50(2):130-139.
[7]宿莹，吴智敏，胡程鹤．CFRP布加固钢筋混凝土梁的新型复合粘贴技术[J]．建筑科学与工程学报，2009,26(4):66-72
[8]胡程鹤．改进的复合黏结FRP技术的试验研究[D]．大连:大连理工大学，2011.
[2] YUN Y C,WU Y F,TANG W C. Perfromance of FRP Bonding Systems Under Fatigue Loading[J].Engineering Structures,2008,26(4):1-12.
[3]颜俊辉．FRP混合粘贴技术加固混凝土梁的试验研究[D]．长沙:湖南大学，2009.
[4]张峰，徐向锋，李术才．HB-FRP加固RC梁的精细有限元分析[J]．哈尔滨工业大学学报，2015,27(8):125-128.
[5]张峰，牛平霞，李树忱．FRP-螺栓联合加固RC梁粘结性能试验研究[J]．土木建筑与环境工程，2010,32(6):7-13.
[6] ZHOU Y Z,GOU M K,ZHANG F Y,et al. Reinforced Concrete Beams Strengthened with Carbon Fiber Reinforced Polymer by Friction Hybrid Bond Technique:Experimental Investigation[J].Material and Design,2013,50(2):130-139.
[7]宿莹，吴智敏，胡程鹤．CFRP布加固钢筋混凝土梁的新型复合粘贴技术[J]．建筑科学与工程学报，2009,26(4):66-72
[8]胡程鹤．改进的复合黏结FRP技术的试验研究[D]．大连:大连理工大学，2011.