OBSERVATIONS ON THE MOVEMENT OF ICE AT A BRIDGE PIER

PHOTOGRAMMETRIC OBSERVATIONS ON THE MOVEMENT OF AN ICE COVER ABOUT A BRIDGE PIER ARE MADE. MOST OF THE MOVEMENT WAS ACROSS RIVER RATHER THAN UP OR DOWNSTREAM, AND APPEARED TO BE RELATED TO THE CRACK PATTERN THAT DEVELOPED ABOUT THE PIER DUE TO CHANGES IN WATER LEVEL. IT IS SUGGESTED THAT WHEN CRACKS FORM ON THE UNDER SIDE OF THE COVER THEY FILL WITH WATER WHICH SUBSEQUENTLY FREEZES. BECAUSE OF THE RESULTING INCREASE IN AREA, A THRUST IS DEVELOPED IN THE COVER WHEN THE WATER RETURNS TO ITS ORIGINAL LEVEL FLOODING OF THE COVER ABOUT THE PIER HAS A MAJOR INFLUENCE ON THE CHARACTERISTICS OF THE ICE ADJACENT TO THE PIER. OBSERVATIONS ON THE VERTICAL DEFLECTION OF THE COVER AND THE LOCATION OF CRACKS ARE NOTED FOR YOUNGS MODULUS AND POISSONS RATIO. IT IS SUGGESTED THAT OBSERVATIONS ON THE DEFLECTION OF ICE COVERS ADJACENT TO LONG STRAIGHT WALLS CAN GIVE USEFUL INFORMATION ON THE VERTICAL FORCES THAT ICE CAN EXERT ON STRUCTURES. /CGRA/

• Supplemental Notes:
  • Nrc 985 (Tm92), PP 135- 141, 3 FIG, 1TAB, 2 REF
• Corporate Authors:

  National Research Council, Ottawa /Can

  ,    
• Authors:
  • Gold, L W
• Publication Date: 1968-3

Subject/Index Terms

• TRT Terms: Bridge piers; Cracking; Deflection; Ice; Modulus of elasticity; Motion; Photogrammetry; Poisson ratio; Thrust
• Old TRIS Terms: Poissons ratio
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208215
• Record Type: Publication
• Source Agency: CANADIAN GOOD ROADS ASSOCIATION
• Files: TRIS
• Created Date: Nov 23 1970 12:00AM