2016年2月下第45卷第4期
D01;10.7672/sgjs2016040095
施工技术
CONSTRUCTION TECHNOLOGY
预应力碳纤维板加固梁桥新技术的应用
尚守平，张宝静，吕新飞
（潮南大学土木工程学院，潮南长沙410082）
【摘要】对预应力碳纤维板材的特性及预应力碳纤维板加固梁桥新技术进行了简要介绍，并对其加固设计原理进行了理论推导计算。根据检测单位出具的检测报告结果采用预应力碳纤维板加固新技术对沫津渡大桥进行加固设计，并对其加固设计方案、张拉工艺分别进行了剖析，最后简述了课题组对加固后桥梁的试验检测结果。在此基础上，通过预埋在碳纤维板表面上的光纤光栅传感器对加固后的桥梁进行长期监测试验，并对其预应力损失进行计算分析，试验结果表明：预应力碳纤维板在长期荷载作用下，预应力损失非常小，对梁桥加固效果几乎不产生影响。
【关键词】桥梁工程；加固；预应力；碳纤维板；张拉工艺；预应力损失
【中图分类号】U445.7°2
【文献标识码】A
【文章编号】1002-8498（2016)04-0095-05
Application of the NewReinforcement Bridge TechnologywithPrestressed CFRPPlate
Shang Shouping, Zhang Baojing, Lo Xinfei
(School of Cisil Engineering, Hu'nan Unitersity, Changsha, Hu'nan 410082,China)
Abstract:The characteristics of prestressed CFRP plate and the new reinforced bridge technologies of prestressed CFRP plate were briefly introduced in the paper. The reinforcement design principle of eea issued by authoritative unit, the bridge was carried on the reinforcement design using the new strengthening technology of prestressed CFRP plate which based on the reinforcement project of the Zhujindu bridge in the city of Xiangtan, Hu' nan province. The reinforcement design method and the tensioning process were analyzed in this paper, finally the experiment test on the bridge was carried by research group after the completion, test results met the requirements of reinforcement. On this basis, the researcher had also carried on the long-term observation through the embedded fiber Bragg grating sensor on the carbon fiber sheet, and calculated the prestress loss of the carbon fiber sheet, the test results showed that: prestress loss of CFRP was very small under long-term loads, which was almost no effect on the beam bridge reinforcement.
Key words:bridges; strengthening; prestressing; CFRP plate; tension technology; loss of prestress
新中国成立以来，我国经历了基本建设飞速发展的时期，修建了大量的桥梁和房屋。随着使用年限的增长，许多建国初期建造的桥梁由于标准提高、设计施工不当、荷载增加、材料老化、环境腐蚀、使用功能变更等众多原因，面临着或拆除重建或加固补强，若拆除重建，势必会给国家和社会带来很
“十二五国家科技支撑计划项目（2011BAJ08B02）
【作者简介】尚守平，博士，教授，博士生导师，E-mail:sps①hnu. eda
【收稿日期】2015-06-24 万方数据
95
大的经济负担，但传统的加固方法存在施工困难工期较长、抗腐蚀性差、耐久性差等缺点。使用预应力碳纤维板材加固桥梁技术是近年来在国内外快速发展的加固技术之一，对碳纤维板材施加预应力，可以充分利用碳纤维板材的高强性能，同时还可以改善碳纤维板材与混凝土接触处的界面黏结应力分布，进而延缓碳纤维剥离破坏。由于碳纤维板材抗拉强度高、耐腐蚀性强、设计方便、施工简单高效等优点，使得预应力碳纤维板材加固钢筋混凝土构件的研究近年来在国内外深受重视，并取得了