LONGITUDINAL CRACK IN PRESTRESSED BOX BEAM

A WIDE AND DEEP LONGITUDINAL CRACK DEVELOPED IN THE BOTTOM OF A BRIDGE BOX BEAM AND EXTENDED FROM ONE SUPPORT ALMOST TO MID-SPAN. A DETERMINATION OF THE MOST PROBABLE CAUSE OF THE CRACK AND AN EVALUATION OF THE ULTIMATE AND RESERVE STRENGTH OF THE BEAM BY LOAD TESTING TO FAILURE WERE MADE. RECOMMENDATIONS ARE GIVEN TO PREVENT FUTURE SIMILAR CRACKING BEHAVIOR AS FOLLOWS: USE DRAINS OF MINIMUM 1 1/4 IN DIAMETER TO DRAIN POSSIBLE ACCUMULATION OF WATER IN THE VOID COMPARTMENTS; USE NON-PERMEABLE TUBES AS FORMS FOR THE VOID COMPARTMENTS IN BOX BEAMS; PLACE VERTICAL STIRRUPS IN THE LOWER PORTION OF BOX BEAMS AT A SPACING NOT TO EXCEED 3/4 THE EFFECTIVE DEPTH OF THE MEMBER NOR 24 IN., WHICHEVER IS SMALLER. /AUTHOR/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08879672
• Supplemental Notes:
  • Vol 14, No 5, PP 38-42
• Authors:
  • Nawy, E G
  • Goodwin, H
• Publication Date: 1969-10

Media Info

• Serial:
  • PRECAST/PRESTRESSED CONCRETE INSTITUTE. JOURNAL
  • Publisher: Precast/Prestressed Concrete Institute
  • ISSN: 0887-9672

Subject/Index Terms

• TRT Terms: Beams; Box beams; Drains; Longitudinal cracking; Prestressing; Prevention; Tubing; Ultimate strength; Water
• Old TRIS Terms: Determination; Prestressed beams
• Subject Areas: Bridges and other structures; Highways; Security and Emergencies;

Filing Info

• Accession Number: 00209186
• Record Type: Publication
• Files: TRIS
• Created Date: May 13 1970 12:00AM