Protocol for Evaluation of Existing Bridges
| 项目名称： | Protocol for Evaluation of Existing Bridges |
| 摘要： | The proposed project will develop protocols for evaluation of existing bridges. The proposed research will involve identification of problems to be addressed -- for example, verification of the load distribution factors, actual live load (weight of trucks), dynamic load factors, minimum load carrying capacity, or fatigue load spectra. The available field-testing procedures will be presented and described. The developed protocols will include description of the required equipment and operational guides. The protocols will also include the assessment of accuracy, potential problems, and best practice observations. The field tests will include the measurement of strain and deflection, with the objective of determining/verifying the dynamic load factor, girder distribution factor, and minimum load carrying capacity. Field-testing will be applied to pre-selected representative structural types and materials, so that the obtained results can be applied to a wider population of bridges. Field-testing will involve instrumentation using strain gauges and LVDT's, a power generator, and a data acquisition system. The test load will be considered in the form of test trucks. For proof loading, it is efficient to use military tanks (acquirable from local National Guard). The developed protocols will be demonstrated on three selected bridges. The structures will be selected in cooperation with the Nebraska Department of Roads (NDOR). Field tests will be performed to verify the live load distribution factor, dynamic load factor, and minimum load carrying capacity by proof load test. |
| 状态： | Completed |
| 资金： | 60964.00 |
| 资助组织： | Research and Innovative Technology Administration |
| 执行机构： | Mid-America Transportation Center |
| 开始时间： | 20130701 |
| 实际结束时间： | 20141231 |
| 主题领域： | Bridges and other structures；Design；Highways |
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