Vibration of horizontally curved box girder bridges due to vehicles Article

cited authors

  • Huang, D; Wang, TL; Shahawy, M

fiu authors

abstract

  • The purpose of this paper is to develop a procedure for obtaining the dynamic response of thin-walled curved box girder bridges due to truck loading and to get their basic impact characteristics. The box girder bridge is divided into a number of thin-walled beam elements. Both warping torsion and distortion are considered in the study. The analytical vehicle is the AASHTO HS20-44 truck simulated as a nonlinear vehicle model with 11 independent degrees of freedom. Four different classes of road-surface roughness generated from power spectral density function for very good, good, average, and poor roads are used in the analysis. In comparison with the other approaches developed by former investigators, the proposed procedure not only facilitates a physical understanding of the general structural response, but also greatly reduces the computing time required and output obtained. The analytical results show that most impact factors of torsion and distortion are much larger than those of vertical bending response. The impact factors of normal stress at different points in the same cross section are quite different. The larger the normal stress, the smaller the impact factor will be. Though the static normal stresses at different positions in the same cross section may be extremely different for a curved box girder bridge, their dynamic normal stresses tend to be uniform. © 1998 Elsevier Science Ltd. All rights reserved.

publication date

  • January 1, 1998

Digital Object Identifier (DOI)

start page

  • 513

end page

  • 528

volume

  • 68

issue

  • 5