CTCP temperature fields and stresses
| Autor: | Chao Guo, Baoyang Yu, Yanhai Yang, Min-jiang Zhang, Zhengran Lu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Thermal contact conductance
050210 logistics & transportation Materials science lcsh:TE1-450 business.industry 05 social sciences 0211 other engineering and technologies 02 engineering and technology Structural engineering Residual Finite element method Transverse plane Cracking Temperature gradient Mechanics of Materials 021105 building & construction 0502 economics and business Slab Coupling (piping) Geotechnical engineering business lcsh:Highway engineering. Roads and pavements Civil and Structural Engineering |
| Zdroj: | International Journal of Pavement Research and Technology, Vol 10, Iss 6, Pp 553-562 (2017) |
| ISSN: | 1996-6814 |
| Popis: | Cross-tensioned concrete pavements (CTCPs) are used in the construction of continuous Portland cement concrete pavements. They eliminate the need for transverse joints and also restrict cracking of the pavement. A CTCP consists of three components, namely, the CTCP slab, the sand sliding layer (SSL), and the cement-stabilized macadam base, from top to down. The retard-bonded tendons (RBTs) of the CTCP slab are arranged diagonally. In the present study, a detailed 3D finite element model was developed and used to examine the temperature fields and stresses of a CTCP by thermal-mechanical coupling analysis, and the results were compared with field measurements. The model investigations revealed that, under typical cloudless summer conditions, the temperature field of the CTCP varied nonlinearly with both time and depth. The resultant step-type temperature gradient of the CTCP represents a significant deviation from that of a conventional pavement and impacts the thermal contact resistance of the SSL. It was found that the SSL could effectively reduce the temperature stresses in the CTCP, and that the residual temperature stresses were effectively resisted by the staged cross-tensioned RBTs. The potential problem areas in the vicinity of the temperature stresses were also investigated by the finite element method and field tests. Keywords: Portland cement concrete pavement, Prestressed concrete pavement, Temperature stress, Temperature field, Finite element method, Retard-bonded tendon |
| Databáze: | OpenAIRE |
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