Corner loading and curling stress analysis for concrete pavements an alternative approach
| Autor: | Shao-Tang Yen, Ying-Haur Lee, Ying-Ming Lee |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Canadian Journal of Civil Engineering. 29:576-588 |
| ISSN: | 1208-6029 0315-1468 |
| DOI: | 10.1139/l02-033 |
| Popis: | Since corner breaks are one of the major structural distresses in jointed concrete pavements, this research study mainly focuses on the determination of the critical bending stresses at the corner of the slab due to the individual and combination effects of wheel loading and thermal curling. A well-known slab-on-grade finite element program (ILLI-SLAB) was used for the analysis. The structural response characteristics of a slab corner were first investigated. Based on the principles of dimensional analysis, the dominating mechanistic variables were carefully identified and verified. A series of finite element factorial runs over a wide range of pavement designs was carefully selected and conducted. The resulting ILLI-SLAB corner stresses were compared with the theoretical Westergaard solutions, and adjustment factors were introduced to account for this discrepancy. Prediction equations for stress adjustments were developed using a modern regression technique (Projection Pursuit Regression). A simplified stress analysis procedure was proposed and implemented in a user-friendly computer program (ILLISTRS) to facilitate instant stress estimations and practical trial applications.Key words: concrete (rigid) pavements, corner breaks, loading, thermal curling, corner stress. |
| Databáze: | OpenAIRE |
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