IMPACT FACTORS FOR SIMPLE CONCRETE BRIDGES

THE DYNAMIC DEFLEXIONS RECORDED ON 22 SPANS OF TEN DIFFERENT CONCRETE BRIDGES SUPPORTING A MOVING TRUCK ARE REPORTED AND THE MAXIMUM DISPLACEMENTS ARE COMPARED WITH PREDICTIONS BASED ON A SIMPLE MATHEMATICAL MODEL IN WHICH THE BRIDGE IS IDEALIZED AS A SINGLE SIMPLY SUPPORTED BEAM AND THE VEHICLE IS REPRESENTED BY A SINGLE AXLE SPRUNG LOAD. FOR MOST OF THE SPANS TESTED THE DYNAMIC IMPACT ALLOWANCE IMPLIED BY CURRENT CODE PROVISIONS IS SHOWN TO BE INADEQUATE. A MORE SATISFACTORY BASIS IS PROPOSED FOR THE DETERMINATION OF DESIGN IMPACT FACTORS FOR SIMPLE CONCRETE BRIDGES. /AUTHOR/

• Authors:
  • Shepherd, R
  • Aves, R J
• Conference:
  • Inst Civil Engineers Proc, London /UK/
• Publication Date: 1973-3

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 191-210
• Serial:
  • Volume: 55

Subject/Index Terms

• TRT Terms: Concrete bridges; Deflection; Design; Dynamics; Forecasting; Mathematical models; Motion; Trucks
• Uncontrolled Terms: Design features; Impact factor
• Subject Areas: Bridges and other structures; Design; Highways; Motor Carriers;

Filing Info

• Accession Number: 00210251
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Files: TRIS
• Created Date: Apr 20 1974 12:00AM