Seismic performance assessment of the UL FGG building on Hajdrihova st. by computer programs 3Muri and SAP2000

摘要

In this thesis, the seismic performance assessment of the UL FGG building on Hajdrihova st.udwas investigated by 3Muri and SAP2000 software. In the first chapter the behaviour of masonryudbuildings under seismic actions are presented with an emphasis on failure mechanisms ofudstructural components. Then follow the provisions of the Eurocode 8-3 standard, which dealsudwith seismic assessment of existing buildings. Further on, the simplified N2 method based onudnon-linear static (pushover) analysis is introduced. In the practical part of the thesis the ULudFGG building is presented. To achieve similar results in both programs we tried to make theudmodel in SAP similar to 3Muri model as much as possible. Eigenvalue analysis was performedudon three models – the 3Muri model, the SAP frame model and the SAP shell model. Audcomparison of natural periods has shown 4 % to 33 % smaller values for SAP models. Theudreason for differences could be in different mass moments of inertia. To check the influence ofudMMI, parametric analysis was performed. Results of the analysis have shown the need forudenhancement of the SAP model MMI to 220 % of its original value, but this kind of adjustmentudcannot be physically explained. Analysis also shows that the results for two SAP models areudmuch closer in comparison to each other than the results of any SAP model in comparison toudthe 3Muri model. This could be the result of different analysis methods – 3Muri using FME andudSAP using FEM. In an attempt to eliminate the differences between models in both programs,uda simpler model was analyzed. It turns out, the differences between models are not audconsequence of the definition of structural components. More likely the difference is causedudby not considering the same analysis method. Further on, the non-linear static analysis in bothudprograms was investigated. Non-linear behaviour of the material in SAP model was modeledudby defining the plastic hinges into elements of the/an equivalent frame. Again it turned out, theudresults of SAP and 3Muri models were far from similar.