VIBRATION MEASUREMENTS ON A MODERN STEEL BRIDGE

VIBRATION MEASUREMENTS MADE IN AUGUST 1965 ON A NEWLY COMPLETED BRIDGE ARE DESCRIBED. THIS BRIDGE IS OF STEEL GIRDER CONSTRUCTION WITH FIVE SPANS AND A TOTAL LENGTH OF APPROXIMATELY 2000 FEET. THE CENTRAL SPAN IS 521 FEET. MEASUREMENTS WERE MADE AT FIVE LOCATIONS NEAR THE CENTER OF THE BRIDGE ON THE CONCRETE DECK BEFORE AND AFTER THE 1 1/2 INCH THICK ASPHALTIC SURFACE WAS PLACED. LOADINGS WERE PRODUCED BY PNEUMATIC TIRED TRUCKS OF VARIOUS WEIGHT TRAVELLING AT DIFFERENT SPEEDS. THE RESULTS INDICATED THAT THE BRIDGE WAS LIGHTLY DAMPED AND ACTED AS IF THE SEPARATE SPANS WERE FIXED AT THE SUPPORTS. THE CLOSE AGREEMENT BETWEEN THE MEASURED FREQUENCIES OF VIBRATION AND THOSE OBTAINED FROM A SIMPLE THEORETICAL MODEL INDICATE THAT THIS TWO-FOLD APPROACH TO A STUDY OF THE DYNAMIC RESPONSE CHARACTERISTICS OF MODERN BRIDGES COULD BE A FRUITFUL FIELD OF RESEARCH. /CGRA/

• Supplemental Notes:
  • pp 15-19, 1 PHOT, 12 FIG, 1 TAB, 1 REF
• Authors:
  • Ward, H S
• Publication Date: 1966-9

Media Info

• Serial:
  • Engineering Journal /Canada/

Subject/Index Terms

• TRT Terms: Asphalt; Bridge decks; Bridge members; Concrete; Dynamic loads; Electromagnetic frequencies; Girder bridges; Length; Measurement; Metal bridges; Pavement surface course; Pneumatic equipment; Steel; Steel bridges; Tires; Trucks; Vibration
• Uncontrolled Terms: Bridge spans; Dynamic response
• Old TRIS Terms: Pneumatic tire
• Subject Areas: Bridges and other structures; Highways; Motor Carriers; Vehicles and Equipment;

Filing Info

• Accession Number: 00208187
• Record Type: Publication
• Source Agency: CANADIAN GOOD ROADS ASSOCIATION
• Files: TRIS
• Created Date: Jan 30 1994 12:00AM