Concrete slab analyses with field-assigned non-uniform support conditions
Intelligent compaction (IC) technologies have been used to locate and identify areas of soft, weak or non-uniform subgrade support, which can be linked to pavement performance to set realistic limits on allowable non-uniformity as identified by IC. Based on field data, finite element analyses were performed to investigate the impact of non-uniformities on concrete slab tensile stresses. Non-uniform support cases were modelled by deterministically and randomly assigning field-correlated moduli of subgrade reaction (k-values) to specific spatial areas in the foundation layer. Stresses depended on the size of the non-uniform area, the stiffness change between adjacent non-uniform areas, load location and configuration, and temperature differential. Cases with randomly assigned k-values showed as much as a 39% increase in peak slab tensile stresses relative to a uniform support condition, which could lead to premature slab failures. The ability of IC to locate foundation non-uniformities could increase the reliability of concrete pavements.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/44544515
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Supplemental Notes:
- Abstract reprinted with permission of Taylor & Francis.
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Authors:
- Roesler, Jeffery R
- Chavan, Hemant
- King, Daniel
- Brand, Alexander S
- Publication Date: 2016-8
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 578-589
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Serial:
- International Journal of Pavement Engineering
- Volume: 17
- Issue Number: 7
- Publisher: Taylor & Francis
- ISSN: 1029-8436
- Serial URL: http://www.tandf.co.uk/journals/titles/10298436.html
Subject/Index Terms
- TRT Terms: Coefficient of subgrade reaction; Concrete pavements; Finite element method; Subgrade (Pavements)
- Uncontrolled Terms: Field data; Intelligent compaction; Nonuniform stress distribution; Slab support; Tensile stresses
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 01596445
- Record Type: Publication
- Files: TRIS
- Created Date: Mar 15 2016 3:00PM