复合材料科学与工程 ›› 2022, Vol. 0 ›› Issue (7): 11-19.DOI: 10.19936/j.cnki.2096-8000.20220728.002

• 基础研究 • 上一篇    下一篇

预应力CFRP板加固钢-混凝土组合梁受弯性能的有限元分析

宫唯康1, 刘晓阳1, 荆玉才2, 项俊宁3, 李相国3, 杨国涛1*   

  1. 1.青岛理工大学 土木工程学院,青岛266525;
    2.山东高速路桥集团股份有限公司,济南250014;
    3.山东高速工程建设集团有限公司,济南250014
  • 收稿日期:2021-09-10 出版日期:2022-07-28 发布日期:2022-08-23
  • 通讯作者: 杨国涛(1986-),男,博士,教授,主要从事钢与混凝土组合结构、结构稳定和结构安全性等方面的研究,yangguotao@qut.edu.cn。
  • 作者简介:宫唯康(1998-),男,硕士,主要从事组合梁加固方面的研究。
  • 基金资助:
    国家自然科学基金(51808308,51978351);山东省工业和信息化厅项目:钢混组合梁部分斜拉桥建造关键技术应用研究(202150100860)

Finite element analysis study on the flexural behaviour of steel-concrete composite beams strengthened with prestressed CFRP plates

GONG Wei-kang1, LIU Xiao-yang1, JING Yu-cai2, XIANG Jun-ning3, LI Xiang-guo3, YANG Guo-tao1*   

  1. 1. College of Civil Engineering, Qingdao University of Technology, Qingdao 266525, China;
    2. Shandong Hi-Speed Road & Bridge Group Co., Ltd., Jinan 250014, China;
    3. Shandong Hi-Speed Engineering Construction Group Co., Ltd., Jinan 250014, China
  • Received:2021-09-10 Online:2022-07-28 Published:2022-08-23

摘要: 为研究不同设计参数对预应力CFRP板加固钢-混凝土组合梁受弯性能和CFRP板强度贡献率的影响,采用有限元软件Abaqus对万世成[1]论文中的试验构件进行有限元分析,通过对比模拟值、试验值与理论值验证模型的正确性。基于该有限元模型,对CFRP板加固钢-混凝土组合梁进行参数分析,结果表明,增加CFRP板的长度、宽度和厚度以及提高CFRP板的预应力水平,可以明显提升组合梁的抗弯性能。同时,增加H型钢单对称比和腹板宽厚比也可以提高组合梁弹性阶段刚度和抗弯性能。此外,增加CFRP板的长度和腹板宽厚比,提高CFRP板的预应力水平,以及减小CFRP板的截面面积和H型钢单对称比,可以提高CFRP板的强度贡献率。

关键词: 钢-混凝土组合梁, 加固, CFRP, 预应力, 受弯性能, 有限元, 复合材料

Abstract: In order to study the effect of different design parameters on the bending performance of the steel-concrete composite beams strengthened with prestressed CFRP plate and the strength contribution rate of the CFRP plate, finite element analysis is performed based on the experimental work of Wan[1]. The reliability of the model is verified by the comparisons between the simulation results, experimental results and theoretical results. Based on the finite element model, a parametric study on the flexural behaviour of steel-concrete composite beams strengthened with CFRP plates is conducted. The results show that increasing the length, width, thickness and the prestress level of the CFRP plate, significantly improves the bending performance of strengthened composite beams. Besides, increasing the mono-symmetric ratio of the H-beam and the width-thickness ratio of the web can also improve the bending performance of composite beams. Moreover, the strength contribution rate of the CFRP plate increases with the increase of the length and prestress level of the CFRP plate and the width-thickness ratio of the web, but decreases with the increase of the cross-sectional area of the CFRP plate and the mono-symmetric ratio of H-beam.

Key words: steel-concrete composite beam, strengthening, CFRP, prestressing, flexural performance, finite element analysis, composites

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