CONSTRUCTION AND TESTING OF 1/10-SCALE MICRO-CONCRETE MODEL OF NEW POTOMAC RIVER CROSSING, I-266

In order to confirm that the design provides a structure complying with all service load criteria (or indications where modifications are necessary), and to determine that the design provides a structure of adequate strength, a microconcrete model of the proposed three-span box-girder bridge was constructed and tested to destruction. The results of structural tests carried out on the model showed that at service load (representing the dead load of the prototype and one live load plus impact under HS20-44 loading), no structural cracking occured and at design ultimate load, only minor structural cracking was present. Data obtained during the test to destruction showed that under severe overload there was an additional margin of safety against instability of the fascias and webs.

• Corporate Authors:

  Portland Cement Association

  5420 Old Orchard Road
  Skokie, IL  United States  60077
• Authors:
  • Corley, W G
  • Carpenter, J E
  • Russell, H G
  • Hanson, N W
  • Cardenas, A E
  • Helgason, T
  • Hanson, J M
  • Hognestad, E
• Publication Date: 1975

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Box girders; Breaking loads; Bridge design; Bridges; Depth perception; Fracture mechanics; Loads; Mechanical tests; Oversize loads; Safety; Strength of materials; Structural analysis; Structural design; Webbing
• Uncontrolled Terms: Destructive testing; Fascia panels; Model tests; Overloads; Structural adequacy
• Subject Areas: Bridges and other structures; Highways; Safety and Human Factors;

Filing Info

• Accession Number: 00127516
• Record Type: Publication
• Report/Paper Numbers: RD 031.01 E
• Files: TRIS
• Created Date: Jan 14 1976 12:00AM