A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Dynamic analysis of the Mosebacke Bridge and the design of the composite action with post-installed shear connectors
Structural engineers in Sitowise endeavored to address the issue of excessive vibrations in an aging 90-meter footbridge located in Slussen, Stockholm, named the Mosebacke bridge. Installing stud connectors between deck and main beams to achieve composite action, the bridge would improve its dynamic properties; reduce vibrations, and increase its overall strength and stiffness. Guided by the Eurocode, which offers various design recommendations and regulations for composite action, the team explored alternative solutions to achieve composite action in the bridge structure. Since they were faced with limitations in using welded shear studs due to the material composition of the steel, they opted to use screwed shear studs instead. Through strategic interventions such as increasing column thickness, installing cross-beams, and implementing stud connectors for composite action, the vibrations in the bridge were aimed to be reduced. To assess the current vibrations of the strengthened bridge, a finite element model representing the bridge was necessary for the dynamic analysis. Investigating the impact of having a single continuous deck instead of multiple separate decks was also part of the study. The finite element model was created with Abaqus representing the new bridge with different modeling approaches tested for the composite action. In addition to modeling, a field experiment was conducted in which vibrational data from accelerometer sensors was analyzed using MATLAB. The analysis determined the bridge's first three bending and torsional frequencies, which helped to validate the FEM model and evaluate it against the recommended frequency limits for pedestrian bridges. The first two lateral frequencies were also determined. The interactions for the composite action were investigated with different constraints and springs. The results are showing that a tie constraint between the top flange surface area connected to the same area size of the deck is the best representative of the 900+ shear screw studs in the ...
Dynamic analysis of the Mosebacke Bridge and the design of the composite action with post-installed shear connectors
Structural engineers in Sitowise endeavored to address the issue of excessive vibrations in an aging 90-meter footbridge located in Slussen, Stockholm, named the Mosebacke bridge. Installing stud connectors between deck and main beams to achieve composite action, the bridge would improve its dynamic properties; reduce vibrations, and increase its overall strength and stiffness. Guided by the Eurocode, which offers various design recommendations and regulations for composite action, the team explored alternative solutions to achieve composite action in the bridge structure. Since they were faced with limitations in using welded shear studs due to the material composition of the steel, they opted to use screwed shear studs instead. Through strategic interventions such as increasing column thickness, installing cross-beams, and implementing stud connectors for composite action, the vibrations in the bridge were aimed to be reduced. To assess the current vibrations of the strengthened bridge, a finite element model representing the bridge was necessary for the dynamic analysis. Investigating the impact of having a single continuous deck instead of multiple separate decks was also part of the study. The finite element model was created with Abaqus representing the new bridge with different modeling approaches tested for the composite action. In addition to modeling, a field experiment was conducted in which vibrational data from accelerometer sensors was analyzed using MATLAB. The analysis determined the bridge's first three bending and torsional frequencies, which helped to validate the FEM model and evaluate it against the recommended frequency limits for pedestrian bridges. The first two lateral frequencies were also determined. The interactions for the composite action were investigated with different constraints and springs. The results are showing that a tie constraint between the top flange surface area connected to the same area size of the deck is the best representative of the 900+ shear screw studs in the ...
Dynamic analysis of the Mosebacke Bridge and the design of the composite action with post-installed shear connectors
Özkanat, Merve (author) / Rajesh Agrawal, Malayaj (author)
2024-01-01
24660
Theses
Electronic Resource
English
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