A study on mechanical behavior of Kevlar fiber reinforced concrete under static and high-strain rate loading

IF 2.1 Q2 ENGINEERING, CIVIL International Journal of Protective Structures Pub Date : 2022-08-14 DOI:10.1177/20414196221118596

Yeou-Fong Li, Yanyan Huang, Jin-Yuan Syu, Ying-Kuan Tsai, Chih-Hong Huang

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引用次数: 1

Abstract

Reinforced concrete structures sometimes are deteriorated and damaged by seismic and blast wave loadings, and the resistance of fiber-reinforced concrete was tested at a loading of high-strain rate. Therefore, concrete structures were needed to improve the dynamic load resistance and energy absorption capabilities. In infrastructures, fiber is incorporated into concrete and is used to strengthen structures to increase its durability and resistance to high-strain rate loadings. In this study, the quasi-static and dynamic mechanical behaviors of Kevlar fiber-reinforced concrete were studied by the compressive strength test and Split Hopkinson Pressure Bar test, respectively. The 0.5% weight ratio Kevlar fiber content of KFRC specimens attained the highest strength in the quasi-static and dynamic test compared with benchmark and other 1.0%, 1.5% weight ratios. The KFRC specimens with the length of 12 mm and 24 mm exhibit similar effects in the quasi-static compressive strengths, but the KFRC specimens with the length of 24 mm fiber attained higher strain energies under dynamic loading.

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凯夫拉纤维增强混凝土在静态和高应变率荷载下的力学性能研究

在地震和冲击波作用下，钢筋混凝土结构有时会发生劣化和破坏，并对纤维钢筋混凝土在高应变率荷载下的抗力进行了测试。因此，需要提高混凝土结构的抗动载能力和吸能能力。在基础设施中，纤维被掺入混凝土中，用于加强结构，以增加其耐久性和对高应变率载荷的抵抗力。本研究分别通过抗压强度试验和劈裂霍普金森压杆试验研究了凯夫拉纤维增强混凝土的准静态和动态力学行为。在准静态和动态试验中，与基准材料和其他1.0%、1.5%重量比的材料相比，重量比为0.5%的纤维含量的KFRC试件强度最高。纤维长度为12 mm和24 mm的KFRC试样在准静态抗压强度方面表现出相似的效果，但纤维长度为24 mm的KFRC试样在动态加载下获得了更高的应变能。

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来源期刊

International Journal of Protective Structures ENGINEERING, CIVIL-

CiteScore

4.30

自引率

25.00%

发文量