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Advances in Materials Science and Engineering
Volume 2017 (2017), Article ID 3981908, 9 pages
https://doi.org/10.1155/2017/3981908
Research Article

Experimental Study of Dowel Bar Alternatives Based on Similarity Model Test

1College of Civil and Transportation Engineering, South China University of Technology, Guangzhou 510641, China
2Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
3Division of Highway and Railway Engineering, KTH Royal Institute of Technology, 10044 Stockholm, Sweden

Correspondence should be addressed to Chichun Hu; nc.ude.tucs@uhtc

Received 2 November 2016; Accepted 19 January 2017; Published 15 February 2017

Academic Editor: Hainian Wang

Copyright © 2017 Chichun Hu et al. 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.

Abstract

In this study, a small-scaled accelerated loading test based on similarity theory and Accelerated Pavement Analyzer was developed to evaluate dowel bars with different materials and cross-sections. Jointed concrete specimen consisting of one dowel was designed as scaled model for the test, and each specimen was subjected to 864 thousand loading cycles. Deflections between jointed slabs were measured with dial indicators, and strains of the dowel bars were monitored with strain gauges. The load transfer efficiency, differential deflection, and dowel-concrete bearing stress for each case were calculated from these measurements. The test results indicated that the effect of the dowel modulus on load transfer efficiency can be characterized based on the similarity model test developed in the study. Moreover, round steel dowel was found to have similar performance to larger FRP dowel, and elliptical dowel can be preferentially considered in practice.