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MATHEMATICAL MODEL OF PAVEMENT PERFORMANCE UNDER MOVING WHEEL LOAD.
| 题名： | MATHEMATICAL MODEL OF PAVEMENT PERFORMANCE UNDER MOVING WHEEL LOAD. |
| 作者： | Ullidtz-P |
| 关键词： | MATHEMATICAL-MODELS; PAVEMENT-PERFORMANCE; MOVING-LOADS; VEHICLE-PAVEMENT-INTERACTION; DEFORMATION-; DETERIORATION-; AASHO-ROAD-TEST; CLIMATIC-CONDITIONS; VEHICLE-CHARACTERISTICS; COMPUTER-SIMULATION-MODELS |
| 摘要： | Vehicle-pavement interaction was studied using the Mathematical Model of Pavement Performance (MMOPP). With MMOPP a length of flexible road is first generated on the computer. Values of layer thicknesses, elastic moduli, plastic parameters, and so forth are generated at points spaced 0.3 m apart in such a way that the pattern of variation is similar to that observed on real pavements. The pavement is then loaded using a quarter car model, and the dynamic load is calculated at each point. The permanent deformation of each layer and the structural deterioration of the asphalt layer resulting from the loads are likewise calculated for each point. The next time increment is then considered, changing the materials characteristics in accordance with climatic changes, applying the loads of that increment, and so on. MMOPP was used on two sections from the AASHO Road Test. The traffic was extended to 20 years, and the effects of varying vehicle characteristics such as spring constant of the tire, damping coefficient of the shock absorber, and use of single or dual tires were studied. It is concluded that the deterioration of pavements is a very complex process, depending on an interaction of pavement parameters, climatic effects, vehicle characteristics, and time. Computer simulation appears to be an efficient and cost-effective means of filling some of the gaps in existing knowledge. |
| 总页数： | Transportation Research Record. 1993. (1384) pp94-99 (10 Fig., 2 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
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