A FEASIBILITY STUDY OF METHODS, MATERIALS AND DEVICES FOR CONTROLLING BRIDGE VIBRATIONS

A COMPARISON OF THE DYNAMIC RESPONSE OF VARIOUS BRIDGE DESIGNS TO INDIVIDUAL HEAVY VEHICLE CROSSINGS AND AN EVALUATION OF TECHNIQUES FOR REDUCING THE RESULTANT DYNAMIC MOTIONS OF LONG-SPAN BRIDGES ARE MADE HERE. A THEORETICAL ANALYSIS IS DEVELOPED FOR THE RESPONSE OF SINGLE-SPAN BRIDGES TO VEHICLE CROSSING BASED ON SIMPLIFIED MODEL REPRESENTATIONS FOR THE BRIDGE AND VEHICLE. FOUR SINGLE-SPAN BRIDGE DESIGNS, ALL 250 FEET IN LENGTH, ARE CONSIDERED, COMPOSITE STEEL GIRDER AND ORTHOTROPIC DECK CONSTRUCTION USING BOTH LOW ALLOY STRUCTURAL STEEL AND HIGH STRENGTH STEEL. THE VIBRATORY MOTIONS OF EACH UNTREATED BRIDGE ARE CALCULATED AS A FUNCTION OF VEHICLE TYPE AND SPEED, AND ROADWAY CHARACTERISTICS (IDEALIZED SMOOTH ROAD; DISCONTINUITY ON BRIDGE APPROACH AND ROADWAY ROUGHNESS). A COMPARISON IS MADE BETWEEN THE RESPONSE OF THE UNTREATED BRIDGES WHILE A SINGLE VEHICLE TRAVERSES THE SPAN (DYNAMIC INCREMENT) AND AFTER THE VEHICLE HAS LEFT THE SPAN (RESIDUAL VIBRATION AMPLITUDE). FOUR TREATMENTS FOR BRIDGE VIBRATION CONTROL ARE ANALYZED: RIGIDIZATION; DAMPING; PASSIVE ABSORBERS AND ACTIVE ABSORBERS. THE EFFECTIVENESS OF EACH TREATMENT IN REDUCING THE DYNAMIC MOTIONS OF THE UNTREATED BRIDGES IS EVALUATED. DESIGNS ARE EVOLVED AND A COMPARISON IS MADE ON COST EFFECTIVENESS. CONCLUSIONS REGARDING THE DYNAMIC RESPONSE OF EACH TYPE OF BRIDGE DESIGN AND THE EFFECTIVENESS OF EACH TREATMENT ARE MADE. /AUTHOR/

• Corporate Authors:

  Barry Controls

  ,    

  Massachusetts Department of Public Works

  100 Nashua Street
  Boston, MA  United States  02114

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Desmarais, D A
  • Derby, T F
  • Calcaterra, P C
• Publication Date: 0

Subject/Index Terms

• TRT Terms: Absorbents; Bridge decks; Bridge design; Bridge engineering; Bridges; Cost effectiveness; Damping (Physics); Girders; High strength steel; Highways; Metal bridges; Orthotropic; Steel bridges; Steel structures; Stiffness; Structural design; Structural steel; Studies; Suppressors; Traffic speed; Vehicles; Vibration; Vibration control
• Uncontrolled Terms: Characteristics
• Old TRIS Terms: Absorbers /materials/; Bridge dynamics; Speed studies; Vibration suppressors
• Subject Areas: Bridges and other structures; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00207982
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: Fh-11-7318
• Files: TRIS, USDOT
• Created Date: Mar 7 1971 12:00AM