التفاصيل البيبلوغرافية
| العنوان: |
应变率与短纤维掺量对 TR-HDC 单轴拉伸力学性能影响试验研究. (Chinese) |
| Alternate Title: |
EXPERIMENTAL STUDY ON THE EFFECTS OF STRAIN RATE AND SHORT FIBER CONTENT ON TENSILE BEHAVIOR OF TR-HDC. (English) |
| المؤلفون: |
董志芳, 邓明科, 王 波, 高永辉, 何 涛 |
| المصدر: |
Engineering Mechanics / Gongcheng Lixue; Jul2024, Vol. 41 Issue 7, p202-211, 10p |
| Abstract (English): |
In order to study the uniaxial tensile behaviors of textile-reinforced high ductility concrete (TR-HDC) with different strain rates and short fiber contents, 25 groups of TR-HDC thin-plate specimens were designed to load through uniaxial tensile tests. The effects of strain rate (10−5 s −1 ~ 10−1 s −1) and short fiber content (0% ~ 2%) on the cracking mode, failure mechanism and tensile strength of TR-HDC were studied. The results showed that: TR-HDC had the multi-cracking characteristics under uniaxial tensile load. With the increase in strain rate, the crack spacing of the specimens increased slightly. A higher content of short fibers led to more stable multi-cracking mode. The increase of strain rate and short fiber content can significantly improve the interfacial properties and inhibit the slipping failure of textile. With the increase in strain rate, the mechanical properties of TR-HDC showed strain rate sensitivity. Moreover, its cracking and peak strength showed a significant growth trend with the increase of the short fiber content. Based on the linear logarithmic relationship and multi-factor coupling, the proposed prediction model can unify the static and dynamic tensile strength of TR-HDC, which provides a theoretical basis for its engineering application. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
为研究纤维织物增强高延性混凝土 (TR-HDC) 在不同应变率和短纤维掺量下的单轴拉伸力学性能，该 文设计了 25 组 TR-HDC 薄板试件进行单轴拉伸试验，研究应变率 (10−5 s −1~10−1 s −1) 和短纤维掺量 (0%~2%) 对 TR-HDC 开裂模式、破坏机理和抗拉强度的影响。结果表明：TR-HDC 在单轴拉伸荷载作用下具有多缝开裂特 征，随应变率的增大，试件裂缝间距略有增大趋势，同时短纤维掺量越高，多缝开裂模式越稳定；应变率和短 纤维掺量增加可显著改善界面性能，抑制纤维织物的滑移失效；随应变率的提升，TR-HDC 的力学性能呈现出 一定的应变率敏感性，同时增加短纤维掺量，其开裂和峰值强度也呈现出显著的增长趋势。基于线性对数关系 和多因素耦合提出的预测模型可统一 TR-HDC 静态与动态抗拉强度计算方法，为其工程应用提供了理论依据。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
