Influence of Approach Span Conditions on Vehicle-Induced Dynamic Response of Slab-on-Girder Bridges: Field and Numerical Simulations

This paper investigates the effect of approach span conditions on bridge's dynamic response induced by moving vehicles. A dynamic test on a full scale slab-on-girder bridge (span length = 16.76 m) is conducted with a dump truck. A wood plank is used to simulate the large faulting between the bridge deck and approach slab. Meanwhile, a numerical model of bridge-vehicle system, with consideration of road surface profile and approach span condition, is used to predict the dynamic response of the bridge. The numerical outcomes are compared to the experimental results, and they show a satisfactory agreement. The numerical model is eventually applied to investigate the effect of the approach span condition on the dynamic behavior of the bridge induced by the AASHTO HS20 truck. A parametric study is conducted by changing the road surface condition and the faulting value. The faulting condition of the approach span is found to cause significant dynamic responses in this short span bridge and to have considerable effect on the distribution of impact factors along transverse and longitudinal directions. Furthermore, impact factors obtained from the numerical analyses are compared with those values specified in the AASHTO codes.


  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; Photos; References;
  • Pagination: 23p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01045917
  • Record Type: Publication
  • Report/Paper Numbers: 07-2497
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 7:11PM