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Stability Analysis of Steel Trapezoidal Box-Girder Bridges
A number of construction problems have been observed in steel trapezoidal box-girder bridges in recent years. Failures have ranged from the buckling of bracing members to the complete collapse of a pedestrian bridge during construction in Marcy, New York, which killed one construction worker and injured nine others. These bridges met current design criteria, implying that constructibility may be inadequately addressed in the specifications. Software has been developed to investigate the overall behavior of steel trapezoidal box-girder bridges during the construction phase. Unlike currently available design software, the new software explicitly accounts for partially-composite behavior between the girder and the deck. In addition, the developed program utilizes a finite-element-based procedure in which the exact geometry of the cross-section is discretized for the purposes of analysis. Previous research has demonstrated that such an approach is required to accurately predict the response of trapezoidal box-girder bridges under construction loads. Results for the current study have shown that lateral torsional buckling of the entire girder, which is not currently a limit state for design, must be considered. In this paper, the developed software is used to investigate the failure of the bridge in Marcy. Computed results are shown to agree with observations from the forensic investigation. The potential of the software as a useful aid in the design of steel box-girder bridges is demonstrated.
Stability Analysis of Steel Trapezoidal Box-Girder Bridges
A number of construction problems have been observed in steel trapezoidal box-girder bridges in recent years. Failures have ranged from the buckling of bracing members to the complete collapse of a pedestrian bridge during construction in Marcy, New York, which killed one construction worker and injured nine others. These bridges met current design criteria, implying that constructibility may be inadequately addressed in the specifications. Software has been developed to investigate the overall behavior of steel trapezoidal box-girder bridges during the construction phase. Unlike currently available design software, the new software explicitly accounts for partially-composite behavior between the girder and the deck. In addition, the developed program utilizes a finite-element-based procedure in which the exact geometry of the cross-section is discretized for the purposes of analysis. Previous research has demonstrated that such an approach is required to accurately predict the response of trapezoidal box-girder bridges under construction loads. Results for the current study have shown that lateral torsional buckling of the entire girder, which is not currently a limit state for design, must be considered. In this paper, the developed software is used to investigate the failure of the bridge in Marcy. Computed results are shown to agree with observations from the forensic investigation. The potential of the software as a useful aid in the design of steel box-girder bridges is demonstrated.
Stability Analysis of Steel Trapezoidal Box-Girder Bridges
Popp, D. R. (author) / Williamson, E. B. (author)
Structures Congress 2005 ; 2005 ; New York, New York, United States
Structures Congress 2005 ; 1-10
2005-04-18
Conference paper
Electronic Resource
English
Stability Analysis of Steel Trapezoidal Box-Girder Bridges
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