Constitutive Model of Hybrid Steel Fiber Reinforced Concrete with Different Fiber Lengths

被引：0
|
作者：
Huo L. [1 ]
Bi J. [1 ,2 ]
Zhao Y. [1 ]
Wang Z. [1 ]
机构：
[1] School of Civil Engineering, Tianjin University, Tianjin
[2] Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2022年 / 25卷 / 10期
关键词：
bond‑slip model; constitutive model; fiber‑bridging behavior; hybrid steel fiber reinforced concrete;
D O I：
10.3969/j.issn.1007-9629.2022.10.006
中图分类号：
学科分类号：
摘要：
To fully play the role of reinforcement of fibers with different lengths， the hybrid steel fiber reinforced concrete（HySFRC） was composed of the concrete matrix and steel fibers of different lengths. Considering the fiber debonding process after cracking， the reinforcements of hybrid steel fibers were calculated by the bond‑slip model， and the relationship between steel fiber stress and crack width was established. For the debonding state of hybrid steel fibers along with the crack propagation， the reinforcements of hybrid steel fibers were divided into three stages. Based on the classic smear crack of constitutive model， the bridging effect of hybrid steel fibers was thought to be enhancement， and the constitutive model of HySFRC was established. The constitutive model of HySFRC was introduced into Abaqus software， and the finite element model was established for the four‑point bending test of HySFRC. The correctness of the proposed constitutive model was verified by comparing the experimental date with numerical simulated data. © 2022 Tongji University. All rights reserved.
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页码：1034 / 1039
页数：5
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