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A platform for research: civil engineering, architecture and urbanism
Long-term extreme buffeting response of cable-supported bridges with uncertain turbulence parameters
Highlights Long-term extreme buffeting design-stresses are predicted for a steel box girder. Turbulence variability strongly affects the response of long-span suspension bridges. Predicted long-term extreme accelerations agree with full-scale measurements. Results indicate a need to revisit the design methodology for long-span bridges.
Abstract Although the full long-term method (FLM) is recognized as the appropriate way to identify the design stresses of marine structures subjected to stochastic environmental loading, the FLM has not yet been adopted for the design of wind excited long-span bridges. The results presented in this study show that the current design practice, through short-term extreme response analyses with deterministic turbulence parameters, may significantly underestimate the long-term design stresses of long-span bridges. Both the variability of the turbulence parameters and the uncertainty in the short-term extreme response are found to be important when estimating the design stresses. In addition, the long-term extreme acceleration responses have been compared with the acceleration responses measured in full scale at the Hardanger Bridge, showing considerable improvements to the current design practice.
Long-term extreme buffeting response of cable-supported bridges with uncertain turbulence parameters
Highlights Long-term extreme buffeting design-stresses are predicted for a steel box girder. Turbulence variability strongly affects the response of long-span suspension bridges. Predicted long-term extreme accelerations agree with full-scale measurements. Results indicate a need to revisit the design methodology for long-span bridges.
Abstract Although the full long-term method (FLM) is recognized as the appropriate way to identify the design stresses of marine structures subjected to stochastic environmental loading, the FLM has not yet been adopted for the design of wind excited long-span bridges. The results presented in this study show that the current design practice, through short-term extreme response analyses with deterministic turbulence parameters, may significantly underestimate the long-term design stresses of long-span bridges. Both the variability of the turbulence parameters and the uncertainty in the short-term extreme response are found to be important when estimating the design stresses. In addition, the long-term extreme acceleration responses have been compared with the acceleration responses measured in full scale at the Hardanger Bridge, showing considerable improvements to the current design practice.
Long-term extreme buffeting response of cable-supported bridges with uncertain turbulence parameters
Lystad, Tor M. (author) / Fenerci, Aksel (author) / Øiseth, Ole (author)
Engineering Structures ; 236
2021-02-23
Article (Journal)
Electronic Resource
English
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