In the diploma thesis an assessment of the earthquake resistance of the masonry building was made according to the Eurocode 8-3 standard. The N2 method, which consists of the implementation of non-linear static push-over analysis on a multi-degree-of-freedom model and the estimation of seismic demand on single-degree-of-freedom model, was used. The push-over analysis was performed in two steps. Firstly, a push-over curve at the storey level was determined by taking into account the mechanisms of flexural failure, shear failure due to sliding and shear failure due to formation of diagonal cracks. The material properties of the walls were estimated by consideration of the partial material safety factors and the confidence factor due to limited knowledge of the construction. In the next step, the storey push-over curves were joined together, which resulted in the push-over curve on a structural level. By transforming the latter into an equivalent single-degree-of-freedom model it was made possible to estimate the seismic demand and to verify performance of the structure. Besides the verification of the limit state of damage limitation and the limit state of significant damage, which is envisaged by the Eurocode 8-3 standard, the verification of the near collapse limit state was performed independently for X and Y direction of seismic action. It was found that the limit state of damage limitation is not verified in both directions of loading, while the limit state of significant damage and near collapse limit were not verified only in the direction Y. It is concluded that the building does not meet the safety requirements of the standard Eurocodes 8-3.
|
