Curved Surface Slider devices have been widely used in last years for the protection of both building and structural systems. The spherical shape of the implemented sliding surfaces provide a certain recentering capability, which is generally combined to significant amount of energy dissipation, due to the frictional characteristics of the adopted sliding material. Since both behaviors act simultaneously during motion, experimental tests could return significantly high force values, especially if large bearings are considered. In some of those cases, the maximum force capacity of the testing equipment can be even overcome, and consequently experimental tests can not be performed. The scope of the present work is to provide experimental evidence of the comparison between flat and curved sliding motions. Precisely, the outcomes of bi-directional tests performed on on full-scale Double Curved Surface Slider and Flat Slider devices have been analyzed. On the former typology the frictional and the recentering behaviors have been numerically decoupled, in order to compare the obtained results to the frictional response of the latter device. Results have shown a good agreement between the considered sliding motions, which seems to suggest that the experimental evaluation of flat sliding characteristics could be representative of curved sliding motions.
Experimental comparison between flat and curved sliding conditions for the response evaluation of curved surface slider devices
Pavese A.;Furinghetti M.
2021-01-01
Abstract
Curved Surface Slider devices have been widely used in last years for the protection of both building and structural systems. The spherical shape of the implemented sliding surfaces provide a certain recentering capability, which is generally combined to significant amount of energy dissipation, due to the frictional characteristics of the adopted sliding material. Since both behaviors act simultaneously during motion, experimental tests could return significantly high force values, especially if large bearings are considered. In some of those cases, the maximum force capacity of the testing equipment can be even overcome, and consequently experimental tests can not be performed. The scope of the present work is to provide experimental evidence of the comparison between flat and curved sliding motions. Precisely, the outcomes of bi-directional tests performed on on full-scale Double Curved Surface Slider and Flat Slider devices have been analyzed. On the former typology the frictional and the recentering behaviors have been numerically decoupled, in order to compare the obtained results to the frictional response of the latter device. Results have shown a good agreement between the considered sliding motions, which seems to suggest that the experimental evaluation of flat sliding characteristics could be representative of curved sliding motions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
