Investigation on crack extension resistance curve of aligned steel fiber-reinforced cement-based composites

被引：1

作者：

Qing, Longbang ^{[1
]}

Zhang, Yuebo ^{[1
]}

Mu, Ru ^{[1
]}

Liu, Jiaping ^{[2
]}

机构：

[1] Hebei Univ Technol, Sch Civil & Transportat Engn, Tianjin 300401, Peoples R China

[2] Southeast Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Construct Mat, Nanjing, Peoples R China

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 10期

基金：

中国国家自然科学基金;

关键词：

aligned steel fiber; cement-based composites; fiber dosage; fiber orientation; K-R curve; size effect; FRACTURE PROCESS ZONE; FLEXURAL BEHAVIOR; MECHANICAL-PROPERTIES; CONCRETE; ORIENTATION; PARAMETERS; MODEL; PROPAGATION; TOUGHNESS;

D O I：

10.1111/ffe.14116

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In this study, an analytical method was proposed to predict the crack extension resistance curve (K-R curve) of aligned steel fiber-reinforced cement-based composites (ASFRC). The three-point bending tests were carried out on notched ASFRC specimens. Based on the predicted results, the influence of size effect and fiber dosage on K-R curves of ASFRC specimens was discussed. Finally, the relationship between K-R curves of ASFRC and steel fiber-reinforced cement-based composite (SFRC) specimens was investigated. The results show that the analytical results agree well with the experimental ones. The K-R curve of ASFRC specimen has size effect and increases with fiber dosage. The ASFRC specimen shows a 30% improvement in the crack extension resistance at peak load over the SFRC specimen when the fiber volume dosage is 0.8%, and the improvement becomes more pronounced with increasing fiber dosage. When the K-R curves of ASFRC and SFRC specimens are the same, the fiber consumption can be reduced by at least 40%.

引用

页码：3966 / 3981

页数：16