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Inspection of Louisiana Timber Bridges
| 题名： | Inspection of Louisiana Timber Bridges |
| 作者： | Gopu, V.; Wacker, J. |
| 关键词： | Timber bridges##Inspections##Louisiana##Timber##Wooden bridges##Field performance##Preservation##Treatment##Environmental conditions##Exposure conditions##Inspection tools##Load rating##Lessons learned##Louisiana Department of Transportation and Development (LaDOTD)## |
| 摘要： | This paper reports the result of a study undertaken to assess the condition of timber bridges in four distinctly different geographic regions in the state of Louisiana. This study was carried out as part of an overall national study spearheaded by the U.S. forest Products Laboratory to investigate the field performance of timber bridges. Louisiana, with the second highest number of timber bridges in the nation spread across the entire state, was an excellent location to assess the performance of these bridges under different environmental conditions. The bridges inspected were representative of the various types of timber bridges in the state and covered different exposure conditions. The inspections were conducted with the assistance of the Louisiana DOTD (Department of Transportation and Development) bridge inspection team. The inspection teams utilized advanced assessment tools such as the resistance micro-drill and acoustic devises to evaluate the condition of the suspect regions of the timber sub- and super-structure elements. The availability of the advanced inspection tools eliminated the bridge inspection teams from having to rely on the traditional tools such as the “pick and hammer” to guess the internal condition of the timber member and significantly improve the ability of the bridge inspectors to assign the proper load rating to existing timber bridges. Detailed results of the inspection conducted on a select group of bridges are presented and the benefits of utilizing the advanced assessment tools are highlighted. Lessons learned from the inspections are presented. |
| 总页数： | 10 |
| 报告类型： | 科技报告 |
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