Finite Element Modeling of Heat Transfer in a Reinforced Concrete Pavement

During winter storm events, chemical deicers are commonly used to counteract snow and ice buildup on roadways and bridges. Because typical deicing chemicals reduce the serviceability life of the materials that are commonly used to build these structures (steel, concrete, and asphalt), geothermal heating systems may become a cost-competitive alternative as the resiliency of our transportation structures gains importance. Low-temperature, low-depth geothermal wells can provide a heat source that may be used to counteract surface freezing in areas with moderate winters. This paper focuses on the heat-exchanging behavior that occurs within a heated reinforced concrete pavement section that is subjected to freezing surface temperatures. To model the heat transfer that occurs within a typical concrete pavement section, a transient finite element modeling approach was utilized. For the model that was developed, the effect of the assumed boundary conditions and system-generated heat flux was examined, with a particular focus on the resulting freezing conditions that are present on the pavement surface. After modeling and analyzing several possible system configurations, the results show that the system performance is closely related to the materials that are selected, the input temperature from the geothermal heat source, and the surrounding ambient conditions.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 2942-2951
  • Monograph Title: Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability

Subject/Index Terms

Filing Info

  • Accession Number: 01522749
  • Record Type: Publication
  • ISBN: 9780784413272
  • Files: TRIS, ASCE
  • Created Date: Mar 25 2014 3:07PM