复合材料科学与工程 ›› 2013, Vol. 0 ›› Issue (3): 13-17.

• 基础研究 • 上一篇    下一篇

FRP加固钢筋混凝土梁实用刚度模型

蔺新艳*, 孟海平, 杨健辉, 朱小静   

  1. 河南理工大学土木工程学院,河南焦作 454000
  • 收稿日期:2013-02-05 出版日期:2013-05-28 发布日期:2022-03-16
  • 作者简介:蔺新艳(1979-) ,女,博士,讲师,主要从事工程结构鉴定与维修加固方面的研究。
  • 基金资助:
    国家自然科学基金资助项目(41172317); 河南省教育厅自然科学研究资助项目(2010A560008); 河南理工大学博士基金资助项目(B2009-37)

AN APPLICABLE STIFFNESS MODEL OF RC BEAMS STRENGTHENED WITH FRP SHEETS

LIN Xin-yan*, MENG Hai-ping, YANG Jian-hui, ZHU Xiao-jing   

  1. College of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,China
  • Received:2013-02-05 Online:2013-05-28 Published:2022-03-16

摘要: 为了解决正常使用荷载下FRP 加固钢筋混凝土梁的变形预测问题,本文基于刚度解析法建立了该类构件的实用刚度解析模型,模型中引入了β 和λ 两个参数分别用以考虑FRP 使受拉钢筋和受压混凝土变形减小从而对构件刚度的影响。然后利用该模型预测了加固构件的跨中挠度,并与实测结果进行了比较,两者之间吻合很好。研究表明,加固梁的刚度随FRP用量的增加而提高;所提出的刚度模型简单实用并具有较高的预测精度,可以作为工程设计的参考。

关键词: 钢筋混凝土梁, FRP, 刚度解析法, 挠度

Abstract: In order to predict the deformability of RC beams strengthened with FRP sheets,an applicable stiffness model is drawn based on stiffness analysis method. In this model,the contributions of FRP to stiffness are considered by introducing two parameters β and λ which denote the reduction of steel strain in tension and concrete strain in crush due to the application of FRP,respectively. The midspan deflections given by this proposed model are compared and shown to agree well with the results from the experimental study. The results show that the stiffness of beam is improved with the increase of FRP amount,and that the proposed stiffness model is simple and practical and has satisfying precision,so it can work as a reference for engineering design.

Key words: RC beam, FRP, stiffness analysis method, deflection

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