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Title: A Prediction Method of Plastic Deformation Development of Subbase and Subgrade in Concrete Pavement
Accession Number: 01373807
Record Type: Component
Abstract: In concrete pavements, subbase and subgrade are required to provide uniform support for concrete slabs. However, permanent deformation at the top surface of subbase due to plastic strains in granular materials causes loss of the support. The aim of this study is to develop a method for predicting the plastic strains in subgrade and subbase. The VESYS model that describes the plastic strain as a function of the number of load repetitions and elastic strain is employed in this study. The model was transformed to an incremental form and incorporated into a 3 dimensional finite element program, Pave3D. Validity of the model was verified by comparing predicted and measured deflection developments in a repeated loading test on a test concrete pavement. Effects of the permanent deformation and the plastic parameters on the stress and deflection of concrete slab were examined. It was found that the plastic parameters affected elastic and permanent deflections significantly and they did slab stress slightly. Also, the plastic parameters of subgrade affected elastic and permanent deflections and those of subbase did slab stress.
Supplemental Notes: This paper was sponsored by TRB committee AFP70 Mineral Aggregates
Monograph Title: Monograph Accession #: 01362476
Report/Paper Numbers: 12-2209
Language: English
Corporate Authors: Transportation Research Board 500 Fifth Street, NW Authors: Nishizawa, TatsuoPagination: 14p
Publication Date: 2012
Conference:
Transportation Research Board 91st Annual Meeting
Location:
Washington DC, United States Media Type: Digital/other
Features: Figures; References; Tables
TRT Terms: Identifier Terms: Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways
Source Data: Transportation Research Board Annual Meeting 2012 Paper #12-2209
Files: TRIS, TRB
Created Date: Feb 8 2012 5:08PM
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