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Materials 2017, 10(5), 531; doi:10.3390/ma10050531

Development of a Skewed Pipe Shear Connector for Precast Concrete Structures

1
School of Civil and Environmental Engineering, Yonsei University, Seoul 03722, Korea
2
Railroad Infrastructure Research Team, Korea Railroad Research Institute, Gyeonggi-do 16105, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 14 March 2017 / Revised: 28 April 2017 / Accepted: 9 May 2017 / Published: 13 May 2017

Abstract

Joint connection methods, such as shear key and loop bar, improve the structural performance of precast concrete structures; consequently, there is usually decreased workability or constructional efficiency. This paper proposes a high-efficiency skewed pipe shear connector. To resist shear and pull-out forces, the proposed connectors are placed diagonally between precast concrete segments and a cast-in-place concrete joint part on a girder. Design variables (such as the pipe diameter, length, and insertion angle) have been examined to investigate the connection performance of the proposed connector. The results of our testing indicate that the skewed pipe shear connectors have 50% higher ductility and a 15% higher ratio of maximum load to yield strength as compared to the corresponding parameters of the loop bar. Finite element analysis was used for validation. The resulting validation indicates that, compared to the loop bar, the skewed pipe shear connector has a higher ultimate shear and pull-out resistance. These results indicate that the skewed pipe shear connector demonstrates more idealized behavior than the loop bar in precast concrete structures. View Full-Text
Keywords: shear connector; skewed pipe shear connector; push-out test; pull-out test; finite element analysis; precast concrete structure shear connector; skewed pipe shear connector; push-out test; pull-out test; finite element analysis; precast concrete structure
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kim, S.-H.; Choi, J.-G.; Park, S.; Lee, H.; Heo, A.-H. Development of a Skewed Pipe Shear Connector for Precast Concrete Structures. Materials 2017, 10, 531.

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