The City Hall of Mirandola Hardly Hit by the Earthquake of 2012: Damage Assessment and Approaches for the Seismic Improvement

The City Hall of Mirandola was stricken and damaged by Emilia-Romagna earthquake sequence of May 2012. The research suggests solutions for the rehabilitation of a masonry historic building that presents a serious damage pattern. The solutions includes the base isolation of the global structure. Through the historical analysis, the damage survey and the mechanisms analysis were defined the macro-structure of the palace. Subsequently, was generated different configurations based on the aggregation or separation of the five macro-structure identified. The separation of these proposed projects is done through the use of seismic isolators and dampers. It was carried out a simplified finite element model and the linear elastic dynamic modal analysis was performed to evaluate the main modes of vibration of each configuration, which correspond to the higher values of percentage of participating mass. Finally a response spectrum analysis was performed with the use of data of the earthquake of 29 May 2012. It going to evaluate the seismic behavior of all the configurations.