Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads
One of the major sources of distress in roads is the cracks that appear in flexible asphalt pavements. Combined wheel and thermal load induced cracking in the form of bottom-up and top-down fatigue cracking.In this paper, combined effect of wheel loads and temperature is considered in finite element...
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| Format: | Article |
| Language: | English |
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Unviversity of Technology- Iraq
2010-09-01
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| Series: | Engineering and Technology Journal |
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| Online Access: | https://etj.uotechnology.edu.iq/article_39368_5df7cd62dcadd51ad2ae423f8082447d.pdf |
| _version_ | 1827358213564006400 |
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| author | Mohammed Y. Fattah Shaymaa El-Ghany Ahmed S. Abdaljabbar |
| author_facet | Mohammed Y. Fattah Shaymaa El-Ghany Ahmed S. Abdaljabbar |
| author_sort | Mohammed Y. Fattah |
| collection | DOAJ |
| description | One of the major sources of distress in roads is the cracks that appear in flexible asphalt pavements. Combined wheel and thermal load induced cracking in the form of bottom-up and top-down fatigue cracking.In this paper, combined effect of wheel loads and temperature is considered in finite element analysis of flexible pavement layers. The heat flow equations are derived and the program (ANSYS V 5.4) is utilized to carry out the analysis. The subgrade layer is modeled as an elasto-plastic material following Drucke–rPrager model for yielding of the isotropic material, while both the asphalt and base layers areconsidered elastic. Three different thicknesses for the asphalt layer are tried; namely, 0.05 m, 0.10 m and 0.15 m, respectively. A temperature rise of 40 oC was considered in addition to wheel pressures.It was found that an increase of wheel pressure from (500) to (700) kN/m2 leads to increase in vertical displacement of about (4 – 8)%. This increase becomes (10 – 22%) when the wheel pressure becomes 1000 kN/m2. The temperature rise leads to decrease in the effect of wheel pressure because temperature leads to expansion (upward movement) reverse to wheel load effect. The effect of wheel load is transmitted directly to the underlying subgrade within the wheel zone. The deformed zone under the wheel becomes larger when the load increases. The maximum displacement increases by about (24%) when the load isduplicated. |
| first_indexed | 2024-03-08T06:07:32Z |
| format | Article |
| id | doaj.art-5b9717b141924c0cbb998f7260f4b0e7 |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:07:32Z |
| publishDate | 2010-09-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-5b9717b141924c0cbb998f7260f4b0e72024-02-04T17:46:30ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582010-09-0128185782580210.30684/etj.28.18.1439368Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal LoadsMohammed Y. FattahShaymaa El-Ghany0Ahmed S. AbdaljabbarBuilding & Construction Engineering Department, University of Technology/BaghdadOne of the major sources of distress in roads is the cracks that appear in flexible asphalt pavements. Combined wheel and thermal load induced cracking in the form of bottom-up and top-down fatigue cracking.In this paper, combined effect of wheel loads and temperature is considered in finite element analysis of flexible pavement layers. The heat flow equations are derived and the program (ANSYS V 5.4) is utilized to carry out the analysis. The subgrade layer is modeled as an elasto-plastic material following Drucke–rPrager model for yielding of the isotropic material, while both the asphalt and base layers areconsidered elastic. Three different thicknesses for the asphalt layer are tried; namely, 0.05 m, 0.10 m and 0.15 m, respectively. A temperature rise of 40 oC was considered in addition to wheel pressures.It was found that an increase of wheel pressure from (500) to (700) kN/m2 leads to increase in vertical displacement of about (4 – 8)%. This increase becomes (10 – 22%) when the wheel pressure becomes 1000 kN/m2. The temperature rise leads to decrease in the effect of wheel pressure because temperature leads to expansion (upward movement) reverse to wheel load effect. The effect of wheel load is transmitted directly to the underlying subgrade within the wheel zone. The deformed zone under the wheel becomes larger when the load increases. The maximum displacement increases by about (24%) when the load isduplicated.https://etj.uotechnology.edu.iq/article_39368_5df7cd62dcadd51ad2ae423f8082447d.pdfflexible pavementwheel loadstemperaturefinite elements |
| spellingShingle | Mohammed Y. Fattah Shaymaa El-Ghany Ahmed S. Abdaljabbar Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads Engineering and Technology Journal flexible pavement wheel loads temperature finite elements |
| title | Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads |
| title_full | Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads |
| title_fullStr | Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads |
| title_full_unstemmed | Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads |
| title_short | Analysis of the Performance of Flexible Pavement under the Effect of Wheel and Thermal Loads |
| title_sort | analysis of the performance of flexible pavement under the effect of wheel and thermal loads |
| topic | flexible pavement wheel loads temperature finite elements |
| url | https://etj.uotechnology.edu.iq/article_39368_5df7cd62dcadd51ad2ae423f8082447d.pdf |
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