Dynamic Behavior of PET FRP and Its Preliminary Application in Impact Strengthening of Concrete Columns
Date
2019-11
Authors
Bai, Yu-Lei
Yan, Zhi-Wei
Ozbakkaloglu, Togay
Dai, Jian-Guo
Jia, Jun-Feng
Jia, Jun-Bo
Journal Title
Journal ISSN
Volume Title
Publisher
Multidisciplinary Digital Publishing Institute
Abstract
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.
Description
Keywords
composite materials, polymeric composites, PET FRP, dynamic behavior, Ingram School of Engineering
Citation
Bai, Y. L., Yan, Z. W., Ozbakkaloglu, T., Dai, J. G., Jia, J. F., & Jia, J. B. (2019). Dynamic behavior of PET FRP and its preliminary application in impact strengthening of concrete columns. Applied Sciences, 9(23): 4987.
Rights
Rights Holder
© 2019 The Authors.
Rights License
This work is licensed under a Creative Commons Attribution 4.0 International License.