This paper investigates the dynamic behaviour of the external walls of unreinforced masonry historic buildings with flexible diaphragms subjected to out-of-plane bending. The influence of diaphragms flexibility on the displacement capacity and demand of walls in out-of-plane bending has been studied by means of dynamic analyses with a simplified two-degrees-of-freedom model (2DOF). The wall has been modelled as an assemblage of two rigid bodies connected by an intermediate hinge and restrained at the top by a spring: the damping has been modelled through the introduction of the coefficient of restitution. The equations of motion of the 2DOF system have been derived and integrated in the time domain. Dynamic analyses of a set of walls with Gaussian impulse and recorded ground motions have been performed in order to compare the response of the simply supported wall with the one of the wall with an elastic spring at the top.
A 2-DOF MODEL FOR THE DYNAMIC ANALYSIS OF UNREINFORCED MASONRY WALLS IN OUT-OF-PLANE BENDING / Rocco Gabellieri; Luca Landi; Pier Paolo Diotallevi. - (2013), pp. 1647.1-1647.13. (Intervento presentato al convegno 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering tenutosi a Kos Island, Greece nel 12-14 June 2013).
A 2-DOF MODEL FOR THE DYNAMIC ANALYSIS OF UNREINFORCED MASONRY WALLS IN OUT-OF-PLANE BENDING
GABELLIERI, ROCCO;LANDI, LUCA;DIOTALLEVI, PIER PAOLO
2013
Abstract
This paper investigates the dynamic behaviour of the external walls of unreinforced masonry historic buildings with flexible diaphragms subjected to out-of-plane bending. The influence of diaphragms flexibility on the displacement capacity and demand of walls in out-of-plane bending has been studied by means of dynamic analyses with a simplified two-degrees-of-freedom model (2DOF). The wall has been modelled as an assemblage of two rigid bodies connected by an intermediate hinge and restrained at the top by a spring: the damping has been modelled through the introduction of the coefficient of restitution. The equations of motion of the 2DOF system have been derived and integrated in the time domain. Dynamic analyses of a set of walls with Gaussian impulse and recorded ground motions have been performed in order to compare the response of the simply supported wall with the one of the wall with an elastic spring at the top.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
