[1]高丹盈,张启明,管巧艳..钢筋钢纤维高强混凝土梁正截面开裂弯矩的计算方法[J].郑州大学学报(工学版),2005,26(04):1-4.[doi:10.3969/j.issn.1671-6833.2005.04.001]
　GAO Danying,ZHANG Qiming,Guan Qiaoyan.Calculation method of cracking bending moment of positive section of reinforced steel fiber high-strength concrete beam[J].Journal of Zhengzhou University (Engineering Science),2005,26(04):1-4.[doi:10.3969/j.issn.1671-6833.2005.04.001]

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钢筋钢纤维高强混凝土梁正截面开裂弯矩的计算方法()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

26

期数:

2005年04期

页码:

1-4

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Calculation method of cracking bending moment of positive section of reinforced steel fiber high-strength concrete beam

作者:

高丹盈; 张启明; 管巧艳.

郑州大学环境与水利学院,河南,郑州,450002, 郑州大学环境与水利学院,河南,郑州,450002, 郑州大学环境与水利学院,河南,郑州,450002

Author(s):

GAO Danying; ZHANG Qiming; Guan Qiaoyan

关键词:

钢纤维;  高强混凝土;  开裂弯矩

Keywords:

steel fiber;  high-strength concrete;  Cracking moment

DOI:

10.3969/j.issn.1671-6833.2005.04.001

文献标志码:

A

摘要:

通过12根钢筋钢纤维高强混凝土梁的试验,分析钢纤维对钢筋高强混凝土梁正截面抗裂弯矩的影响.实验结果表明,钢纤维的加入提高了钢筋高强混凝土梁的正截面开裂弯矩,并随着钢纤维体积率的增加呈增长的趋势,增加幅度在40%～100%之间;纵向钢筋配筋率、梁的高度以及钢筋的强度等级对钢筋高强混凝土梁的开裂弯矩也有影响;开裂弯矩随纵筋配筋率的增大以及随截面高度的减小而增大.结合现行有关规范,提出了钢筋钢纤维高强混凝土梁截面抵抗塑性影响系统的计算公式和钢筋钢纤维高强混凝土梁开裂弯矩的计算公式,并用试验数据验证了该公式的正确性.

Abstract:

Through the test of 12 reinforced steel fiber high-strength concrete beams, the influence of steel fibers on the crack bending moment of the positive section of reinforced high-strength concrete beams was analyzed. The experimental results show that the addition of steel fiber improves the cracking bending moment of the positive section of the steel high-strength concrete beam, and the increase trend is increasing with the increase of the volume rate of steel fiber, and the increase range is between 40%~100%. The reinforcement ratio of longitudinal rebar, the height of the beam and the strength grade of the rebar also have an impact on the cracking and bending moment of the rebar high-strength concrete beam. The cracking moment increases with the increase of the reinforcement ratio of the longitudinal rib and the decrease of the cross-sectional height. Combined with the current relevant specifications, the calculation formula of the cross-section resistance to the influence of plasticity of reinforced steel fiber high-strength concrete beam and the calculation formula of the cracking bending moment of reinforced steel fiber high-strength concrete beam are proposed, and the correctness of the formula is verified by test data.

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