Dynamic Behavior of PET FRP and Its Preliminary Application in Impact Strengthening of Concrete Columns

被引：18
作者：
Bai, Yu-Lei [1 ]
Yan, Zhi-Wei [1 ]
Ozbakkaloglu, Togay [2 ]
Dai, Jian-Guo [3 ]
Jia, Jun-Feng [1 ]
Jia, Jun-Bo [1 ]
机构：
[1] Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
[2] Texas State Univ, Ingram Sch Engn, San Marcos, TX 78667 USA
[3] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 999077, Peoples R China
来源：
APPLIED SCIENCES-BASEL | 2019年 / 9卷 / 23期
基金：
中国国家自然科学基金;
关键词：
composite materials; polymeric composites; PET FRP; dynamic behavior; FIBER-REINFORCED POLYMER; CONFINED CONCRETE; STRAIN RATES; COMPRESSIVE BEHAVIOR; TENSILE BEHAVIOR; MODEL; BARS; TUBE; CFRP;
D O I：
10.3390/app9234987
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Polyethylene terephthalate (PET) fiber has attracted significant attention for reinforced concrete (RC) structure rehabilitation due to its large rupture strain (LRS; more than 7%) characteristic and recyclability from waste plastic bottles. This study presents a dynamic tensile test of PET fiber bundles performed using a drop-weight impact system. Results showed that the tensile strength and the elastic modulus of the PET fiber bundles increased, whereas the failure strain and the toughness decreased with the increasing strain rate from 1/600 to 160 s(-1). In addition, the performance of concrete confined with the PET fiber-reinforced polymer (FRP) under impact loading was investigated based on a 75 mm-diameter split Hopkinson pressure bar (SHPB) device and a drop-weight apparatus. For the SHPB test, owing to the large rupture strain property of PET FRP, the PET FRP-confined concrete exhibited significantly better performance under impact loading compared to its counterpart confined with carbon FRPs (CFRPs). During the drop-weight test, the confinement of the PET FRP composites to the concrete columns as external jackets not only improved the peak impact force, but also prolonged the impact process.
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页数：11
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