东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (10): 1009-1012.DOI: -

• 论著 • 上一篇    下一篇

FRP筋混凝土梁非线性全过程分析

张海霞;朱浮声   

  1. 东北大学资源与土木工程学院;东北大学资源与土木工程学院 辽宁沈阳110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-10-15 发布日期:2013-06-24
  • 通讯作者: Zhang, H.-X.
  • 作者简介:-
  • 基金资助:
    辽宁省自然科学基金资助项目(20021008)

Nonlinear full-range analysis of concrete beam reinforced with FRP rods

Zhang, Hai-Xia (1); Zhu, Fu-Sheng (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-10-15 Published:2013-06-24
  • Contact: Zhang, H.-X.
  • About author:-
  • Supported by:
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摘要： 根据FRP筋混凝土梁的受力性能,以数值积分方法为基础,考虑材料的特性,编制计算程序,给出其弯距与曲率、荷载与变形的关系曲线,并与算例中的试验结果相对比,且二者吻合良好;探讨两曲线在不同受力阶段的特征,并将其分为截面开裂前和截面开裂后两阶段;分析配筋率和混凝土强度对截面弯距-曲率关系曲线的影响.研究表明,在截面开裂前,配筋率对弯距-曲率的影响很小;在截面开裂后,其影响较大,随着配筋率的增加,曲线斜率越大,截面刚度越大,梁的抗弯承载力越大;混凝土强度越高,截面的开裂弯距和极限弯距越大.

关键词: FRP筋混凝土梁, 弯距-曲率关系, 荷载-挠度关系, 非线性分析

Abstract: According to the mechanical behavior of concrete beam reinforced with FRP rods and numerical integration a calculation program is given taking account of the properties of materials used. The moment-curvature and loading-displacement relationships of the beam are thus obtained then compared with experimental results with a goodness of fit shown. Discussing the properties of the two relationships in different loading phases, they are divided into pre-cracking and post-cracking segments of beam section. The effects of percentage of reinforcement and concrete strength on moment-curvature curve are analyzed and show that the effect of former in pre-cracking is much less than that in post-cracking. The higher the percentage of reinforcement, the greater slope of curve, section stiffness and flexural strength of beam. At the same time, the higher concrete strength, the greater the cracking-moment and ultimate-moment on the beam section.

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