Research on Stress Spectrum of Steel Decks in Suspension Bridge Considering Measured Traffic Flow

This study investigated the traffic-induced stresses in the steel deck of a suspension bridge on the Yangtze River, taking into account the dependence of Young’s modulus of asphalt pavement on temperature. In particular, the stress spectra of local areas in the steel deck were studied. On the basis...

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Bibliographic Details
Published in:Journal of performance of constructed facilities 2012-02, Vol.26 (1), p.65-75
Main Authors: Ji, Bohai, Chen, Dong-hua, Ma, Lin, Jiang, Zhu-sheng, Shi, Guo-gang, Lv, Lei, Xu, Han-jiang, Zhang, Xiongwen
Format: Article
Language:English
Subjects:
Applied sciences
Asphalt
Bridge elements
Bridges
Buildings. Public works
Decks
Exact sciences and technology
Finite element method
Ground, air and sea transportation, marine construction
Mathematical models
Pavements
Road transportation and traffic
Stresses
Stresses. Safety
Structural analysis. Stresses
Structural steels
Suspension bridges. Stayed girder bridges. Bascule bridges. Swing bridges
TECHNICAL PAPERS
Traffic flow
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Summary:This study investigated the traffic-induced stresses in the steel deck of a suspension bridge on the Yangtze River, taking into account the dependence of Young’s modulus of asphalt pavement on temperature. In particular, the stress spectra of local areas in the steel deck were studied. On the basis of the massive traffic data collected by a bridge toll system over one month, traffic composition and the vehicle load were statistically analyzed, and then a random traffic flow model that reflected the statistical characteristics of actual traffic flow, was generated. Through a bridge dynamic analysis of the random traffic flow model, a segment of the steel box girder which experiences the greatest stress was selected. The local stress variation and the stress spectrum under traffic flow were analyzed using a finite-element model (FEM). In the FEM analysis process, the impact of the temperature on mechanical properties of the asphalt pavement was considered. The results show that the middle segment of the main span has the largest moment amplitude. In addition, it was observed that the variation of Young’s modulus of asphalt pavement resulting from temperature change can significantly affect the stress of the steel box girder and the stress spectrum at different local areas in steel deck.
ISSN:0887-3828
1943-5509
DOI:10.1061/(ASCE)CF.1943-5509.0000249