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Re Entrant Corner Crack

This paper examines cracks which occurred at the re-entrant corners at the dapped ends of bulb tee girders used on the MIA Mover APM System at Miami International Airport. Cracks were initially identified during load testing at the precast yard, although typically they did not occur until the beams were erected. The load test and crack mechanism is described herein. Post-erection cracking is compared with that observed under load test conditions and differences are discussed. FDOT criteria were applied in determining the appropriate protection strategy. Idm complete sound video.

  • Record URL:
      https://doi.org/10.1061/41193(424)14
  • Availability:
    • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784411933
  • Supplemental Notes:
    • Copyright © 2011 ASCE
  • Authors:
    • Leverenz, David G.
    • Davidson, Thomas E.
  • Conference:
    • Location: Paris , France
    • Date: 2011-5-22 to 2011-5-25
  • Publication Date: 2011

A re-entrant corner creates extreme tensile stress concentration at the corners. As the concrete cures, it tries to linearly shrink and move in two directions at right angles to each other. Placed at 45 degrees to the re-entrant corner with nominal top cover. Nikotec dv d500 manual driver. The crack control measures are there to arrest the crack opening and not prevent crack formation. It is the job of isolation detailing and joint positioning to reduce the risk of crack formation at re-entrant corners.

Language

  • English

Media Info

  • Media Type: Web
  • Monograph Title: Proceedings of the Thirteenth International Conference on Automated People Movers and Transit Systems, 2011
Re Entrant Corner Crack

Subject/Index Terms

Reentrant Corner Crack

Reentrant corners steel
  • TRT Terms: Load tests; People movers; Precast concrete
  • Identifier Terms: Miami International Airport
  • Uncontrolled Terms: Bulbtee girders
  • Geographic Terms: Florida
  • Subject Areas: Maintenance and Preservation;

Reentrant Corners Steel

Filing Info

  • Accession Number: 01365047
  • Record Type: Publication
  • ISBN: 9780784411933
  • Files: TRIS, ASCE
  • Created Date: Nov 29 2011 3:00PM