Analisi del comportamento sismico di Palazzo Camponeschi: modelli rappresentativi dello scenario di danno
Several structures, damaged during the 6th April 2009 earthquake, need important interventions on both the structural and non-structural components in order to improve their seismic behavior. In this context, the Edifice A of the Engineering Faculty of L’Aquila, at the top of Roio hill, composed by seven irregular RC substructures, represents, due to the particular damage scenario, a significant case of study. The present paper discusses the ability of geotechnical and structural modeling in reproducing the structural seismic behavior which justify the observed damage or undamaged scenario for both main and supported components. Firstly, the recent results obtained in site characterization are summarized to obtain a reasonable estimate of the main shock characteristics. Secondly, the main modal properties of the structures are reproduced with the updating of finite element models on the basis of minimization error procedures between measured and modeled quantities. Thirdly, the nonlinear behavior of the structure has been investigated by classical pushover analysis to determine the capacity level reached during the main shock comparing it with on-site tests and observation. Finally, the seismic behavior of the collapsed facade is examined showing the effects of the experienced structural displacements on the overturning of split-face brick walls.