Investigation of Premature Strip Seal Joint Failures and Recommendations for Assuring Proper Strip Seal Joint Installation: Bridge 5/104W

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 Washington State Department of Transportation (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.

  • Record URL:
  • Corporate Authors:

    Washington State Department of Transportation

    Bridge and Structures Office, 7345 Linderson Way
    Tumwater, WA  United States  98501

    Washington State Department of Transportation

    Bridge and Structures Office, P.O. Box 47340
    Olympia, WA  United States  98504-7340
  • Authors:
    • Boone, Craig
  • Publication Date: 2015-8

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos;
  • Pagination: 70p

Subject/Index Terms

Filing Info

  • Accession Number: 01610850
  • Record Type: Publication
  • Report/Paper Numbers: WA-RD 858.1
  • Files: TRIS, ATRI, STATEDOT
  • Created Date: Aug 31 2016 9:05AM