预应力CFRP板加固剐蹭损伤桥梁及现场监测  

Strengthening Damaged Bridge with Prestressed CFRP and Field Monitoring

作　　者：许国文 徐伟龙 熊浩[1,2] 白洁 许志东[3] 李乐 XU Guowen;XU Weilong;XIONG Hao;BAI Jie;XU Zhidong;LI Le(China Construction Eighth Engineering Division Co.,Ltd.,Shanghai 200122,China;Research Center of Shanghai Carbon Fiber Composite Application Technology in Civil Engineering,Shanghai 200122,China;Guangzhou Beierhuan Transportation Technology Co.,Ltd.,Guangzhou,Guangdong 510540,China)

机构地区：[1]中国建筑第八工程局有限公司,上海200122 [2]上海碳纤维复合材料土木工程应用工程技术研究中心,上海200122 [3]广州市北二环交通科技有限公司,广东广州510540

出　　处：《施工技术（中英文）》2022年第12期7-12,共6页Construction Technology

基　　金：中建股份科技研发计划(CSCEC-2020-Z-1);上海市科技计划项目(20DZ2253000);上海市青年科技英才扬帆计划(21YF1452400)。

摘　　要：利用碳纤维增强复合材料(CFRP)轻质高强特点,采用粘贴CFRP布和预应力CFRP板的方式对剐蹭损伤桥梁进行快速修复加固。详细介绍了修复加固方案和施工工艺。联合使用电阻应变片和光纤光栅(FBG)应变传感器对加固过程及完成后48d内CFRP板的应力进行监测,得到预应力CFRP板中短期内的预应力损失情况。通过现场荷载试验对修复加固后桥梁进行性能测试,结果表明加固后桥梁的静力和动力性能均满足规范要求,且加固后混凝土梁比相邻无损伤跨具有更大刚度和更小残余变形。Utilizing the characteristics of light mass and high strength of carbon fiber reinforced polymer(CFRP),a damaged bridge was quickly reinforced by pasting CFRP sheets and prestressed CFRP plates.This paper introduces the reinforcement scheme and construction technology.The stress of the CFRP plate is monitored by resistance strain gauge and fiber Bragg grating(FBG)sensor during the reinforcement process and within 48 days after completion.The prestress loss of the CFRP plate in the short and medium term is obtained.The performance of the reinforced bridge is tested through a field load test.The results show that the static and dynamic performance of the reinforced bridge meets the requirements of the code.The reinforced beam has greater stiffness and smaller residual deformation than the adjacent intact one.

关 键 词：桥梁工程 加固 碳纤维增强复合材料 预应力 施工技术 监测 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]