CFRP板加固连续T梁桥优化与纵向影响规律分析

doi:10.19936/j.cnki.2096-8000.20250728.016

复合材料科学与工程 ›› 2025, Vol. 0 ›› Issue (7): 132-139.DOI: 10.19936/j.cnki.2096-8000.20250728.016

CFRP板加固连续T梁桥优化与纵向影响规律分析

彭文柏^1,2, 邱斌^2,3*, 温强^2,3, 董春彦^1,2, 邬文祥²

1.云南省建筑结构与新材料企业重点实验室,昆明 650223;
2.云南省建筑科学研究院有限公司,昆明 650223;
3.昆明市建筑工程结构安全和新技术重点实验室,昆明 650223

收稿日期:2024-07-08 出版日期:2025-07-28 发布日期:2025-08-22
通讯作者: 邱斌(1984—),男,博士,正高级工程师,研究方向为桥梁检测与加固,945705509@qq.com。
作者简介:彭文柏(1978—),男,学士,高级工程师,研究方向为桥梁检测与加固、建筑结构检测与鉴定。
基金资助:
云南省交通运输厅科技创新及示范项目(云交科教便[2020] 91号);企业科研项目(2024JKY010)

Optimization and longitudinal influence analysis of CFRP plate reinforced continuous T-beam bridge

PENG Wenbai^1,2, QIU Bin^2,3*, WEN Qiang^2,3, DONG Chunyan^1,2, WU Wenxiang²

1. Yunnan Provincial Key Laboratory of Building Structure and New Materials, Kunming 650223, China;
2. Yunnan Institute of Building Research Co., Ltd., Kunming 650223, China;
3. Kunming Key Laboratory of Structural Safety and New Technology for Construction Engineering, Kunming 650223, China

Received:2024-07-08 Online:2025-07-28 Published:2025-08-22

摘要/Abstract

摘要： 为了分析CFRP板加固连续T梁桥不同桥跨时,加固跨与相邻跨之间的影响效应和纵向预应力损失效应,从而提高CFRP板的利用效率及加固效果,首先对单片T梁进行了CFRP板加固和加载试验,并将试验与有限元分析结果进行了对比分析,验证了单梁有限元模型的合理性和准确性。之后建立了CFRP板加固5 m×30 m连续T梁的数值模型,分析了加固跨与邻跨之间加固效果的影响规律及纵向预应力损失效应。最后基于影响矩阵法优化CFRP板张拉应力值并应用于实桥,且通过加固后荷载试验验证了该桥5跨T梁预应力补足量均满足设计要求。结果表明:连续T梁桥加固跨和邻跨之间的加固影响规律及纵向预应力损失较为明显;基于影响矩阵法优化CFRP板张拉应力值可显著提高边跨与次边跨CFRP板的利用效率,边跨和次边跨的优化效果分别可达38.16%、24.64%。

关键词: CFRP板, T梁加固, 加固效果, 影响效应, 纵向预应力损失

Abstract: In order to analyze the influence effect of the reinforced span and the adjacent span and the longitudinal prestress loss effect of the CFRP plate reinforcement of the continuous T-beam bridge with different spans, so as to improve the utilization efficiency of the CFRP plate and the reinforcement effect of the T-beam. Firstly, the reinforcement and loading tests of the single-piece reinforced concrete T-beam reinforced by CFRP plate are carried out, and the test results are compared with the finite element analysis results to verify the rationality and accuracy of the finite element model. Then, a numerical model of CFRP plate reinforcement of 5 m×30 m continuous T-beam was established, and the influence of reinforcement effect and longitudinal prestress loss effect of reinforced span and adjacent span were analyzed. Finally, the tensile stress value of CFRP plate is optimized based on the influence matrix method and applied to the 5-span continuous T-beam solid bridge, and the prestress compensation of the 5-span T-beam of the bridge is verified by the load test after reinforcement to meet the design requirements. The results show that the influence law of reinforcement and longitudinal prestress loss of continuous T-beam bridge reinforcement span and temporary span are obvious, and the tensile stress value of CFRP plate can be significantly improved by optimizing the tensile stress value of CFRP plate based on the influence matrix method, and the optimization effect of side span and secondary side span can reach 38.16% and 24.64%, respectively.

Key words: CFRP plate, T-beam reinforcement, reinforcement effect, influence effect, longitudinal prestress loss

中图分类号:

TB332

彭文柏, 邱斌, 温强, 董春彦, 邬文祥. CFRP板加固连续T梁桥优化与纵向影响规律分析[J]. 复合材料科学与工程, 2025, 0(7): 132-139.

PENG Wenbai, QIU Bin, WEN Qiang, DONG Chunyan, WU Wenxiang. Optimization and longitudinal influence analysis of CFRP plate reinforced continuous T-beam bridge[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(7): 132-139.

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CFRP板加固连续T梁桥优化与纵向影响规律分析

Optimization and longitudinal influence analysis of CFRP plate reinforced continuous T-beam bridge

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