Bridge structural systems are often represented by high risk levels, from several standpoints. The strategic role they generally play in the infrastructure network leads to significant exposure characteristics, with a resulting high risk level. Even though the seismic action is not always a key issue for a considered bridge, excessive horizontal loading may lead to unexpected failures at specific local levels. Among all the possible structural elements, bearing devices can represent in some case the most vulnerable component of the overall system, which can cause sudden and brittle collapses, at ultimate conditions. In this work the behavior of bearing devices for bridge structural systems has been analyzed, by comparing the outcomes of experimental campaigns to numerical parameters, commonly adopted in analytical simulations. Then, some case study structures have been modeled, in order to carry out a parametric study, with varying mechanical properties, and consequently accounting for the effect of aging on the force response of the single devices. Special attention has been focused on the displacement at the bearing locations, rather than the internal forces of piers, and results have been normalized with respect to the mean values for the assumed mechanical properties.
ANALYSIS OF THE FORCE RESPONSE OF BEARING DEVICES FOR BRIDGE STRUCTURES
Furinghetti M.
;Reale S.;Fox M. J.;Pavese A.
2023-01-01
Abstract
Bridge structural systems are often represented by high risk levels, from several standpoints. The strategic role they generally play in the infrastructure network leads to significant exposure characteristics, with a resulting high risk level. Even though the seismic action is not always a key issue for a considered bridge, excessive horizontal loading may lead to unexpected failures at specific local levels. Among all the possible structural elements, bearing devices can represent in some case the most vulnerable component of the overall system, which can cause sudden and brittle collapses, at ultimate conditions. In this work the behavior of bearing devices for bridge structural systems has been analyzed, by comparing the outcomes of experimental campaigns to numerical parameters, commonly adopted in analytical simulations. Then, some case study structures have been modeled, in order to carry out a parametric study, with varying mechanical properties, and consequently accounting for the effect of aging on the force response of the single devices. Special attention has been focused on the displacement at the bearing locations, rather than the internal forces of piers, and results have been normalized with respect to the mean values for the assumed mechanical properties.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
