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李红鸽¹ , 吴志文¹ , 滕仁栋² , 李南南³ , 贾铂杰⁴

 

( 1. 石家庄市道桥设施管护中心 , 石家庄   050019 ;  2.  河北省建筑科学研究院有限公司 ,  石家庄   050021 ;

3. 石家庄市道桥建设总公司综合维护管理所 , 石家庄   050091 ;

4. 北京中铁装饰工程有限公司 , 北京   100040)

摘  要 :  为了研发适用于服役年限超过 20 年的病害桥梁及涉水恶劣环境桥梁的高效快速加固技术 , 解决城市在役中小跨径桥梁耐久性与力学性能不足的问题 , 依托石家庄市一座跨河 3 跨简支板病害梁桥开展实桥加固研究 , 提出对各跨径简支板粘贴不同层数的玄武岩纤维布和碳纤维布的三种加固方案 , 通过动静载试验采集桥梁加固前后各项技术参数 , 分析对比玄武岩纤维布和碳纤维布在梁板加固中对桥梁综合性能的提升效果 。结果表明 : 玄武岩纤维布作为绿色建材完全可以替代高成本的碳纤维布实施梁板加固 , 加固后 , 桥梁各孔挠跨比、钢筋最大应力增量均低于加固前 ; 动挠度与动应变冲击系数均有降低 , 各项指标均满足规范要求 , 加固效果良好 。研究结果可为后续既有病害桥梁快速加固相关研究提供新思路与试验参考 ,  为我国大量既有老旧桥梁的加固改造提供可靠技术支撑 , 也为推动既有桥梁运维加固技术升级 、保障基础设施安全提供工程实践参考。

关键词 : 玄武岩纤维布 ; 在役简支板梁桥 ; 加固技术 ; 桥梁耐久性 ; 桥梁力学性能

中图分类号 : U445. 7           文献标志码 : A           文章编号 :  1005- 8249  (2026)  03-0151-07

DOI :10. 19860/j. cnki. issn1005- 8249. 2026. 03. 025

 

LI Hongge¹ , WU Zhiwen¹ , TENG Rendong² , LI Nannan³ , JIA Bojie⁴

( 1. Shijiazhuang Road & Bridge Facilities Management and Maintenance Center ,  Shijiazhuang 050019 , China;

2.  Hebei Academy of Building Research Co. , Ltd. ,  Shijiazhuang 050021 , China;

3. Comprehensive Maintenance Management Office of Shijiazhuang Road & Bridge Construction Corporation ,  Shijiazhuang 050091 , China;

4. Beijing China Railway Decoration Engineering Co. , Ltd. , Beijing 100040 , China)

Abstract :  In order to develop an efficient and rapid reinforcement technology suitable for diseased bridges with a service life of more than 20  years  and  bridges in harsh  water - related environments , and solve the problem of  insufficient durability and mechanical properties of small and medium - sized bridges in service in the city , this paper relies on a river - crossing 3-span simply supported plate disease bridge in Shijiazhuang City to carry out real bridge reinforcement research , and proposes three   reinforcement schemes for each span simply supported plate to paste different layers of basalt fiber cloth and carbon fiber cloth. The technical parameters of the bridge before and after reinforcement were collected through dynamic and static load tests , and the improvement effect of basalt fiber cloth and carbon fiber cloth on the comprehensive performance of the bridge in beam plate reinforcement was analyzed and compared.  The results show that basalt fiber cloth as a green building material can completely replace the high-cost carbon fiber cloth to implement beam and plate reinforcement.  After reinforcement , the deflection - span ratio of each hole of the bridge and the maximum stress increment of the steel bar are lower than those before reinforcement.  The dynamic deflection  and  dynamic  strain  impact  coefficient  are  reduced ,  and  all  the  indexes  meet  the  requirements  of  the specification , and the reinforcement effect is good.  The research results can provide new ideas and experimental references for the follow - up  research  on the rapid reinforcement  of existing  diseased bridges , provide reliable technical  support for the reinforcement and  reconstruction  of  a  large number of  existing old bridges in China , and also provide engineering practice reference for promoting  the  upgrading  of existing  bridge  operation  and  maintenance  reinforcement  technology  and  ensuring  the safety of infrastructure.

Key words :  basalt fiber cloth  ; simply supported plate girder bridge in service  ; reinforcement technology  ; bridge durability  ; mechanical properties of bridge