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Evaluation of the AASHTO 18-KIP Load Equivalency Concept.
| 题名： | Evaluation of the AASHTO 18-KIP Load Equivalency Concept. |
| 作者： | HUDSON, W. R.; KAWA, I.; ZHANG, Z. |
| 关键词： | PAVEMENT LOADING |
| 摘要： | There are increasing demands for the almost 500,000 kilometers of public roads in Texas that are experiencing significant congestion. According to the Federal Highway Administration (FHWA), 25 percent of the Texas urban interstate highways have exceeded 95 percent of their capacity, and 43 percent are operating at over 80 percent of their carrying capacity. The resulting congestion not only costs Texas motorists an estimated $3.9 billion in delays and fuel costs each year, but also contributes to higher deterioration of pavement structures. At the same time, the Texas Department of Transportation (TxDOT), given its limited resources, is constrained in its efforts to maintain and improve these congested roadways. Determining load equivalency factors (LEFs) is critical in pavement design and rehabilitation. Incorrect evaluation of the damage from axle loads on pavements can lead to costly early failure. Overestimating equivalent single axle loads (ESALs) will cause unnecessary expenditures in over-designed pavements that can divert funding from other projects. This is an interim report for Project 0-1713, which is evaluating the 18-kip equivalency concept. This report presents the information synthesis, which includes a literature review and a report of our evaluation of the AASHTO 18-kip equivalency concept accomplished so far. The results presented in this report set the stage for further evaluation of the 18-kip equivalency concept; in addition, the results can facilitate the development of mathematical models for calculating load equivalency factors, if necessary. |
| 报告类型： | 科技报告 |
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