VALUTAZIONE DELLA RISPOSTA SISMICA DI EDIFICI ESISTENTI ALTI IN C.A. A PARETI SISMO-RESISTENTI. UN ESEMPIO: LA SEDE DELLA REGIONE EMILIA-ROMAGNA

In this work it was generally discussed the issue of the seismic behavior of buildings with resistant walls in reinforced concrete, in addition to the issue of the safety assessment of existing buildings , more and more major current topic in recent years. Specifically, are then shown the results obtained from the evaluation of seismic safety carried out on the headquarters of the Emilia-Romagna region, which is made with a seismic-resistant cylindrical walls in circular and semi-circular section. To perform this assessment of safety has also discussed the problem of the calculation of the shear strength in the walls with circular and semi-circular section making the point about the state of the art scientific research and proposing a simplified method of calculation of said shear resistance. Finally, we applied the method of "Direct Displacement Based Design" (D.D.B.D.) in the structure analyzed by checking if the application of this design method could provide more quickly a value for estimate the safety factor of the building.