Structural model updating of a historical stone masonry tower considering soil-structure interactions
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This thesis has been performed to investigate the dynamic properties of a historic masonry tower, "Slottsfjelltårnet," located in Tønsberg, Norway, to update the finite element model with and without considering the soil-structure interaction effects. The Slottsfjelltårnet” case study is a part of the Hyperion Project funded by the European Union’s Horizon 2020. Some operational modal analyses have been used to identify the main natural frequencies and corresponding mode shapes based on available AVT test results done by Agon Ademi . Applying these methods helps to improve the understanding of the tower’s dynamic structural behavior. Moreover, different soil-structure interaction modeling techniques have been studied and used in modeling to investigate the effects of soil-structure interaction on the structure's dynamic characteristics. Three different models, one without and two with soil-structure interaction effects, have been used in the analysis. Finally, the sensitivity analysis and the model updating of finite element models have been done. Sensitivity analysis has been carried out to investigate the most sensitive parameters of the structure before model updating. Then, the finite element model updating has been done, resulting in optimal material properties for each model. Model updating helps to have an accurate finite element model for future analysis of the Slottsfjell tower.