原文传递
Methodological Framework for Truck-Factor Estimation Considering Vehicle-Pavement Interaction
| 题名： | Methodological Framework for Truck-Factor Estimation Considering Vehicle-Pavement Interaction |
| 其他题名： | AASHTO.(1993).AASHTO guide for design of pavement structures,Washington,DC. |
| 正文语种： | 英文 |
| 作者： | Arminda Maria Marques Almeida |
| 关键词： | Asphalt pavements;Trucks;Simulation;Dynamic loads;Surface roughness |
| 摘要： | Truck traffic is usually characterized by using truck factors (TFs). ATF converts a mixed truck traffic stream over the pavement design lifetime into a number of equivalent single-axle loads (ESALs). This conversion requires equivalent single-axle load factors (EALFs), which can either be empirical or theoretical. The mechanistic-empirical pavement design guide (MEPDG) considers axle load spectra and uses it to run the response model, considering implicitly theoretical EALFs. This paper presents a methodology for TF estimation based on theoretical EALFs calculated by using simulated axle loads, thus overcoming the unavailability of data to define axle load spectra. Once the EALFs are calculated for several simulations, TFs are established and regression models are defined to predict TFs. To reach this point, the study considered the two most common Portuguese truck configurations and pavement structures. The methodology development and application revealed its flexibility and upgradability. The results indicated that vehicle-pavement interaction increases TFs by up to 27％ when the initial international roughness index (IRI) increases 1 m=km, underling the importance of the dynamic behavior of the loads. |
| 出版年： | 2015 |
| 论文唯一标识： | P-72Y2015V141N02003 |
| 英文栏目名称： | Technical Papers |
| doi： | 10.1061/(ASCE)TE.1943-5436.0000726 |
| 期刊名称： | Journal of Transportation Engineering |
| 拼音刊名(出版物代码)： | P-72 |
| 卷： | 141 |
| 期： | 02 |
| 页码： | 11-20 |
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