[1]孙艺嘉,吴涛,王征,等.FRP筋混凝土梁正截面受弯承载力模型分析[J].西安建筑科技大学学报(自然科学版),2019,51(01):83-90.[doi:10.15986/j.1006-7930.2019.01.013]
　SUN Yijia,WU Tao,WANG Zheng,et al.Analysis on the flexural capacity model of FRP-reinforced concrete beams[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(01):83-90.[doi:10.15986/j.1006-7930.2019.01.013]
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FRP筋混凝土梁正截面受弯承载力模型分析()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年01期
页码:
83-90
栏目:
出版日期:
2019-02-28

文章信息/Info

Title:
Analysis on the flexural capacity model of FRP-reinforced concrete beams
文章编号:
1006-7930(2019)01-0083-08
作者:
孙艺嘉; 吴涛; 王征; 刘喜
(长安大学建工学院,陕西 西安 710061)
Author(s):
SUN Yijia;  WU Tao;  WANG Zheng;  LIU Xi
(School of Civil Engineering, Changan University, Xian 710061, China)
关键词:
规范对比; FRP筋; 混凝土梁; 受弯承载力计算公式; 修正系数
Keywords:
FRP bars;  concrete beam;  flexural capacity calculation formula;  reduction factor
分类号:
TU377.9+1
DOI:
10.15986/j.1006-7930.2019.01.013
文献标志码:
A
摘要:
结合国内外328组FRP筋混凝土梁受弯试验数据，系统分析了我国规范(GB50608-2010)、美国规范(ACI 440.1R-15)、加拿大规范(ISIS manual 2007)和意大利规范(CNR-DT 203/2006)的承载力计算模型，对比了各国规范计算结果的准确性和离散程度．通过对受压破坏试件参数ρf/ρfb和cb/xexp进行回归分析，建立了等效矩形受压区高度x的经验公式，改进了受压破坏FRP筋梁承载力计算公式，并给出了使计算结果具有95%保证率的强度修正系数．结果表明：在ρf<ρfb和ρfb≤ρf<1.5ρfb两种情况下，各国规范计算值与试验值吻合良好；当1.5ρfb≤ρf时，各国规范计算值均偏保守．与以上规范计算公式相比，该文建议公式的计算值与试验值更为接近．
Abstract:
Collected and analyzed are 328 testing results of flexural capacity of FRP-reinforced concrete beams. The results were employed to assess the accuracy and dispersion degree of the current design formulas in GB50608, ACI 440.1R, ISIS manual and CNR-DT 203. Regression analysis of ρf/ρ fb and cb/xexp for specimens controlled by compression failure was carried out and the formula of depth of equivalent rectangular stress block x was obtained. The equation of flexural capacity of FRP-reinforced concrete beams controlled by compression failure was revised and the strength correction coefficient with 95% guarantee rate was proposed. The results showed that when ρf<1.5ρ fb, the calculation results agreed well with the test results; and when 1.5ρfb≤ρf, however, the average predictions by specifications were all higher than test values by more than 20%. Compared with the standards, the proposed formulas yield estimations closer than the test results

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备注/Memo

备注/Memo:
收稿日期:2017-06-22
修改稿日期:2019-01-15
基金项目:国家自然科学基金项目（51578072）
第一作者：孙艺嘉（1992-），女，博士研究生，主要从事工程结构抗震性能研究．E-mail：sunyijiachd@163.com
通信作者：吴涛(1976-)，男，博士，教授，院长，主要从事工程结构抗震性能研究．E-mail: wutao@chd.edu.cn
更新日期/Last Update: 2019-03-05