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Investigation of Premature Strip Seal Joint Failures and Recommendations for Assuring Proper Strip Seal Joint Installation: Bridge 5/104W
| 题名： | Investigation of Premature Strip Seal Joint Failures and Recommendations for Assuring Proper Strip Seal Joint Installation: Bridge 5/104W |
| 作者： | Boone, C. |
| 关键词： | Washington (State)##Bridge (Structure)##Seal joints##Fresh concrete##Steel factor##Performance##Construction##Performance measures##Recommendations##Improvements engineering##Steel extrusions##Bridge 5/104W## |
| 摘要： | This document summarizes an investigation that was performed to identify the cause(s) of premature failures of strip seal expansion joints that were installed on WSDOT Bridge No. 5/104W. The document also includes recommendations for assuring proper installation of strip seal expansion joints. The investigation found that these strip seal joints failed in two ways, (1) the rubber gland fell out of the steel extrusions, and (2) the anchorage of the steel extrusions to the header concrete had failed. The investigation concluded that the rubber glands had fallen out of the steel extrusions because the glands were never completely seated in the steel extrusions during installation. The investigation identified three possible causes of the steel extrusion anchorage failures. Of the three possible causes, the investigation concludes the most likely cause of the steel extrusion anchorage failures was due to movement of the anchorages in the fresh header concrete before it gained strength. The movements were due to the steel extrusion on one side of the joint being constrained to the steel extrusion on the opposite side of the joint when the header concrete was placed. When the bridge expanded/contracted due to temperature changes, the extrusions in the fresh concrete moved, creating a “sloppy” connection between the anchorage steel and header concrete. The recommendations for assuring proper installation of strip seal expansion joints include educating bridge engineers and construction inspection staff, as well as making improvements to contract plans and provisions. |
| 总页数： | 70 |
| 报告类型： | 科技报告 |
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