小箱梁预应力CFRP板加固前后荷载试验对比

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摘 要：为了研究预应力CFRP板加固桥梁在荷载作用下的工作性能，在加固前对桥梁进行荷载试验，然后进行预应力CFRP板加固。加固后再次进行荷载试验，结果表明，未开裂截面应变减少7%，开裂截面裂缝宽度明显减小，挠度减小5%～8%，未能提高结构的整体刚度。

关键词：预应力CFRP板加固;荷载试验;应变;挠度

中图分类号：U445.72;TU378.2    文献标志码：A  文章编号：1003-5168（2022）16-0050-05

DOI：10.19968/j.cnki.hnkj.1003-5168.2022.16.011

Comparison of Load Test before and after Reinforcement of Small Box Girder with Prestressed CFRP Panels

LONG Xingcan    LI Weifeng

（Nanjing Vocational Institute of Transport Technology， Nanjing 211188， China）

Abstract： To study the working performance of the bridge reinforced with prestressed CFRP plates under load， the load test was carried out on the bridge before reinforcement， and then use prestressed CFRP panels were for bridge reinforcement. After reinforcement， the load test was carried out.The results showed that the strain of the uncracked section was reduced by 7%， the crack width of the cracked section was significantly reduced， and the deflection was reduced by 5%～8%， which failed to improve the overall stiffness of the structure.

Keywords： reinforcement of prestressed CFRP panels; load test; strain; deflection

0 引言

碳纖维增强复合材料（CFRP）加固因具有质量轻、强度高、耐久性好、施工便捷等优点而被广泛应用于公路混凝土旧桥加固改造工程中[1-2]。（剩余4575字）

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