Energy-based method for sudden column failure scenarios: theoretical, numerical and experimental analysis

摘要

Sudden column failure scenarios are commonly proposed by design codes in order to perform homogeneous robustness assessments of buildings, as they allow measurement of their capacity to redistribute loads. However, the analysis of such an event is complex as it includes nonhnearities and dynamics. Simple energy-based approaches can, nevertheless, be used. The proposed method simplifies the dynamic component, reducing the analysis to the calculation of the static response. This approach is based on several simplifications that lead to approximate, yet accurate, results. The theoretical background and physical interpretation of this approach, together with a numerical parameter study are presented. In addition, this methodology has been applied to an experimental campaign carried out at the University of Nottingham. The numerical outcome is compared to the experimental results in order to verify the accuracy and reliability of the approach.