ANALYSIS OF CRC PAVEMENT UNDER MOISTURE, TEMPERATURE, AND CREEP EFFECTS

This paper presents a numerical method for studying the effects of steel reinforcement and environmental parameters on the early-aged behavior of continuously reinforced concrete (CRC) pavements. This procedure consists of 2 stages. The first stage predicts shrinkage strains developed due to moisture loss in the CRC pavement. It uses the semi-discrete method of nonlinear finite element (FE) analysis to predict the moisture distribution in CRC pavement as a function of time. This model is verified with published theoretical and experimental results. An existing FE model is modified and adapted for moisture distribution analysis in concrete pavements. Both shrinkage and thermal stress are determined in 2 stages of analysis. Shrinkage strains and the thermal strains imposed due to variations in ambient temperature are used as input to stress analysis. The second stage predicts stress distributions taking into account concrete creep in the pavement after initial development of the crack pattern. The CRC pavement is represented in the FE analysis with 2-D plane strain elements. Bond slip is modeled at the interface of concrete and steel. Analysis of the internal restraint is performed to determine subsequent concrete pavement stresses caused by environmental effects. An FE code was developed specifically for prediction of the resultant stresses in the concrete pavement.

Language

  • English

Media Info

  • Features: Figures; References;
  • Pagination: p. 211-234
  • Serial:
    • Volume: 1

Subject/Index Terms

Filing Info

  • Accession Number: 00821275
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 26 2001 12:00AM