Probability distribution and recommended value of impact coefficient on crack width in steel fiber reinforced high-strength concrete beams with high-strength reinforcements

被引：0

作者：

Huang, Yunchao ^{[1
]}

Gao, Danying ^{[2
,3
]}

Fang, Dong ^{[4
]}

Cao, Zhen ^{[1
]}

Lei, Jie ^{[1
]}

Ma, Zhifeng ^{[1
]}

Sun, Jiachen ^{[1
]}

机构：

[1] School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou

[2] School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou

[3] College of Civil Engineering, Henan University of Engineering, Zhengzhou

[4] College of Civil Engineering, Zhengzhou University, Zhengzhou

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 11期

关键词：

crack width; guarantee rate; high-strength steel bar; impact coefficient; probability distribution; statistic analysis; steel fiber reinforced concrete;

D O I：

10.14006/j.jzjgxb.2023.0723

中图分类号：

学科分类号：

摘要：

In order to investigated the influence of steel fiber on the maximum crack width of RC beam under normal serviceability states, 17 steel fiber reinforced high-strength concrete (SFRC) beams and one reinforced high-strength concrete (RC) beam with high-strength steel bars were investigated by means of flexural experiments. Test results indicate that the maximum crack width of RC beam with high-strength steel bars under bending obviously decreases with the addition of steel fibers, and steel fiber impact coefficient value on the crack width of SFRC beam with high-strength steel bars is greater than that specified in JGJ / T 465—2019 “Standard for design of steel fiber concrete structures” . The applicability of the impact coefficient of steel fiber in current code of China for the calculation of maximum crack width of SFRC beam with high-strength steel bars, of which the impact coefficient value is used to reflect the influence of steel fiber on the maximum crack width of SFRC beam under bending, is also discussed. The probability distribution of steel fiber impact coefficient on the crack width was analyzed through the experimental data of flexural beams collected from relevant literatures, and the impact coefficient for the different types of steel fibers with various guarantee rates were obtained. Finally, the suggested value of steel fiber impact coefficient on the crack width was proposed to be 0. 45. © 2024 Science Press. All rights reserved.

引用

页码：131 / 140and188

共 31 条

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