✦ LIBER ✦

Vibration of highway steel bridges with longitudinal grades

✍ Scribed by Dongzhou Huang; Ton-Lo Wang

Publisher: Elsevier Science
Year: 1998
Tongue: English
Weight: 793 KB
Volume: 69
Category: Article
ISSN: 0045-7949
DOI: 10.1016/s0045-7949(98)00007-8

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✦ Synopsis

The purpose of this paper is to analyze the eect of longitudinal grade on the vibration of highway bridges. The bridges are modeled as grillage beam systems. The vehicle is simulated as a nonlinear vehicle model with 11 independent degrees of freedom according to the HS20-44 truck design loading speci®ed in the American Associate of State Highway and Transportation Ocials (AASHTO) speci®cations. A good road surface roughness generated from the power spectral density function for the approach roadways and bridge decks is used in the analysis. Two types of longitudinal grade shape with six dierent grades ranging from 1% to 6% are analyzed. The dynamic responses of three steel multigirder bridges with dierent span lengths due to multiple vehicles moving across rough bridge decks with dierent vehicle speeds are evaluated. The analytic results are useful for practical bridge design.

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