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http://dx.doi.org/10.7855/IJHE.2011.13.4.051

Development of Mechanistic-empirical Joint Spacing Design Method for Concrete Pavements  

Park, Joo-Young (인하대학교 토목공학과)
Hong, Dong-Seong (인하대학교 토목공학과)
Lim, Jin-Sun (인하대학교 토목공학과)
Jeong, Jin-Hoon (인하대학교 토목공학과)
Publication Information
International Journal of Highway Engineering / v.13, no.4, 2011 , pp. 51-59 More about this Journal
Abstract
Tensile stress occurs and random crack develops in concrete pavement slab when it contracts by variation of temperature and humidity. The tensile stress decreases and the random crack is minimized by sawcutting the slab and inducing the crack with regular spacing. The random crack, joint damage, decrease of load transfer efficiency are caused by too wide joint spacing while too narrow joint spacing leads to increase of construction cost and decrease of comfort. A mechanistic-empirical joint spacing design method for the concrete pavement was developed in this study. Structurally and environmentally weakest sections were found among the sections showing good performance, and design strengths were determined by finite element analysis on the sections. The joint width for which the load transfer efficiency is suddenly lowered was determined as allowable joint with referring to existing research results. The maximum joint spacing for which the maximum tensile stress calculated by the finite element analysis did not exceed the design strength were found. And the maximum joint width expected by the maximum joint spacing were compared to the allowable joint width. The new method developed in this study was applied to two zones of Hamyang-Woolsan Expressway being designed. The same joint spacing as a test section constructed by 8.0m of joint spacing wider than usual was calculated by the design method. Very low cracking measured at 6 years after opening of the test section verified the design method developed in this study.
Keywords
concrete pavement; joint spacing; joint width; mechanistic-empirical design; finite element analysis;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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