Shear Behavior of Epoxy Resin Joints in Precast Concrete Segmental Bridges
Publication: Journal of Bridge Engineering
Volume 24, Issue 4
Abstract
Epoxy resin joints for precast concrete segmental bridges protect internal posttensioned tendons from corrosion, compensate for irregularities between joint interfaces, and act as a joint lubricant. The shear strength, shear behavior, and crack pattern of the epoxy resin joints with castellated keys were investigated for 25 full-depth male–female shear key specimens match cast with a variety of key geometries, distances, numbers, and angles, internal tendon layouts and reinforcing bars. It was found that these design parameters not only effected joint shear strength but also changed epoxy resin joint failure modes and ductility. Several previous datasets were collected to evaluate six analytical expressions for epoxy resin joint shear strength, and recommendations for their use are presented. An improved analytical expression is proposed to predict the shear strength of epoxy resin joints with reinforced keys.
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Acknowledgments
This study was funded by National Natural Science Foundation of China (Grant 51878250). The financial support is greatly appreciated.
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Information
Published In
Journal of Bridge Engineering
Volume 24 • Issue 4 • April 2019
Copyright
© 2019 American Society of Civil Engineers.
History
Received: Jan 17, 2018
Accepted: Sep 20, 2018
Published online: Jan 23, 2019
Published in print: Apr 1, 2019
Discussion open until: Jun 23, 2019
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