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Evaluation of Failure in Bridge Expansion Joint Rails; Final research rept
| 题名： | Evaluation of Failure in Bridge Expansion Joint Rails; Final research rept |
| 作者： | Dolan, V.; Frank, K. H. |
| 关键词： | Bridge failures; Expansion joints; Concrete structures; Structural failure; Construction materials; Welded joints; Bridge design; Bridge inspection; Drainage; Reinforcing materials; Road materials; Reinforced concrete |
| 摘要： | Strip seal expansion joint systems are composed of two structural parts; the rail and the concrete deck. Failures of expansion joints can be due to failures of either one of these components or a combination of both. The results of this investigation have indicated that the failure of the expansion joints in McAllen was due to a failure in the concrete part of the system. This failure resulted in unintended loads on the anchorage studs leading to the observed joint failures. Testing of the rail sections, studs and welds showed no predisposition of the rails to failure. The steel makeup and stud welding appeared to be of uniform consistency and acceptable quality. Although failure of the expansion joints expresses itself in the rails and studs, this is a secondary effect which is induced by problems with the concrete placement. Failure of the concrete was due to the lack of complete concrete consolidation under the rail. Incomplete consolidation of the concrete is attributed to several factors including: lack of weep holes, form placement and pouring sequence. |
| 总页数： | 54p |
| 报告类型： | 科技报告 |
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