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Effect of Truck Loading on Bridges; Draft rept
| 题名： | Effect of Truck Loading on Bridges; Draft rept |
| 作者： | Nowak, A. S.; Nassif, H. |
| 关键词： | Highway bridges; Trucks; Load bearing capacity; Fatigue(Mechanics); Loading(Mechanical); Corrosion; Bridge design; Loads(Forces); Moments; Load tests; Moving vehicle weight measurement; Stress analysis |
| 摘要： | A procedure for evaluation of live load spectra on highway bridges was developed, tested and a weigh-in-motion (WIM) measurement system was calibrated during field testing on three Michigan bridges. Other equipment considered in this project included electronic theodolite, fleximeter, and Culway system. The study includes experimental and analytical parts. The live load model was developed on the basis of WIM measurements, truck counts, truck surveys, and statistical analysis. There is a considerable difference between the results of truck surveys using weigh stations and WIM. For a large number of trucks on I-94 gross vehicle weight exceeds 200,00 lbs. The evaluation procedure for corroded bridges is developed using sensitivity functions relating the load carrying capacity, corrosion patterns, and material loss. Fatigue analysis is further focused on the estimate and prediction of live load spectra. Structural behavior depends on load frequency and magnitude. Therefore fatigue load spectra are determined using the results of WIM measurements, truck survey data, and truck counts. |
| 总页数： | 179p |
| 报告类型： | 科技报告 |
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