A MODAL METHOD OF CALCULATION OF HIGHWAY BRIDGE RESPONSE WITH VEHICLE BRAKING

A bridge-vehicle system is considered in which a highway bridge is idealised as a lumped-mass beam and the vehicle has two axles, each with a non-linear suspension. Equations of motion are derived in terms of natural modal coordinates of the bridge and displacement coordinates of the vehicle. Variation in speed consistent with applied acceleration or braking force is admitted by the inclusion of an independent coordinate defining vehicle span-wise location. The effect of braking on bridge loading is examined in two bridges of composite construction, one single span and one three span continuous. In these examples the contributions to impact factors by braking effects alone are comparable with the maximum fractional impact allowance of 0.3 commonly specified by design codes. /Author/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/08190259
• Corporate Authors:

  Institution of Engineers

  Science House, Gloucester and Essex Streets
  Sydney,   Australia 
• Authors:
  • Kishan, H
  • Traill-nash, R W
• Publication Date: 1977

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 44-50
• Serial:
  • Institution of Engineers (Australia) Civ Eng Trans
  • Volume: CE19
  • Issue Number: 1
  • Publisher: Institution of Engineers
  • ISSN: 0819-0259

Subject/Index Terms

• TRT Terms: Braking; Bridge superstructures; Composite construction; Equations; Highway bridges; Loads; Motion; Motor vehicles; Nonlinear systems; Speed; Suspensions; Traffic speed; Vehicles
• Uncontrolled Terms: Bridge spans; Loading
• Subject Areas: Bridges and other structures; Highways; Vehicles and Equipment;

Filing Info

• Accession Number: 00172176
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 12 1978 12:00AM