Comparison of Stress Fields near Longitudinal Construction Joints of Tied and Doweled Sections in Portland Cement Concrete Pavements

Date

2021-10-12

Authors

Hong, Geuntae
Kim, Jiyoung
Yeon, Jung Heum
Won, Moon
Choi, Seongcheol

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Publisher

Multidisciplinary Digital Publishing Institute

Abstract

In Portland cement concrete (PCC) pavements, tie bars are commonly used at longitudinal construction joints (LCJs) to prevent the lanes from separating. Meanwhile, the increase in multiple lanes due to greater traffic volumes has raised concerns about potential longitudinal cracking; this has led to the use of dowel bars instead of tie bars at LCJs. However, there is a paucity of studies focused on the comparison between the behaviors of concrete pavement based on the restrained conditions provided by tie and dowel bars at LCJs. In this study, we investigated the effects of the placement of tie and dowel bars at LCJs on the potential for longitudinal cracking in response to the increase in concrete stress that may occur when the lanes are tied together in PCC pavements. Field testing verified that the variation in concrete strain was more restrained in the case of a tie bar than a dowel bar, whereas it resulted in higher stress in the concrete element in the tie bar section. However, the use of dowel bars caused more movement in the transverse direction at LCJs as compared with tie bars. Thus, our results indicate that using dowel bars reduces the potential for longitudinal cracking; however, it may increase the potential for lane separation.

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Keywords

concrete stress, dowel bar, LCJs, longitudinal cracking, PCC pavement, tie bar, Ingram School of Engineering

Citation

Hong, G., Kim, J., Yeon, J. H., Won, M., & Choi, S. (2021). Comparison of Stress Fields near Longitudinal Construction Joints of Tied and Doweled Sections in Portland Cement Concrete Pavements. Sustainability, 13(20), 11217.

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This work is licensed under a Creative Commons Attribution 4.0 International License.

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