Universitätsbibliothek
Weimar Open Access

The phenomenon of aerodynamic instability caused by the wind is usually a major design criterion for long-span cable-supported bridges. If the wind speed exceeds the critical flutter speed of the bridge, this constitutes an Ultimate Limit State. The prediction of the flutter boundary, therefore, requires accurate and robust models. The complexity and uncertainty of models for such engineering problems demand strategies for model assessment. This study is an attempt to use the concepts of sensitivity and uncertainty analyses to assess the aeroelastic instability prediction models for long-span bridges. The state-of-the-art theory concerning the determination of the flutter stability limit is presented. Since flutter is a coupling of aerodynamic forcing with a structural dynamics problem, different types and classes of structural and aerodynamic models can be combined to study the interaction. Here, both numerical approaches and analytical models are utilised and coupled in different ways to assess the prediction quality of the coupled model.

A software framework for probabilistic sensitivity analysis for computationally expensive models

Global and local sensitivity analyses for coupled thermo‐hydro‐mechanical problems

Detection of material interfaces using a regularized level set method in piezoelectric structures

Conceptual implementation of the variance-based sensitivity analysis for the calculation of the first-order effects