This paper presents the dissipative capacities of thin-walled reduced-section elements evaluated through an experimental campaign. The reduction of the cross section is introduced to fulfill of hierarchy rules for dissipative structures when these elements are used as diagonals in Automated Rack Supported Warehouses. Indeed, cold-formed thin-walled elements are adopted in these struc-tures, and for these elements the limited bearing capacity of their connections to the other elements does not allow the dissipation of seismic energy through yielding and plastic deformation of diag-onals. The reduction of the cross section is so necessary, allowing to obtain a resistance of the diagonal lower than the bearing capacity. Anyway, it introduces issues related to the local stability of the reduced part. The behavior of this type of elements is firstly numerically predicted, selecting four possible different layouts for the reduced parts. Then, the actual behavior is validated through the execution of an extensive experimental campaign where tensile and compression monotonic tests are per-formed, as well as cyclic ones. The results of the experimental campaign are used for the calibration of the numerical models and the final evaluation of the performance of whole case-study structures where these dissipative elements may be implemented.
EXPERIMENTAL BEHAVIOR OF DISSIPATIVE THIN-WALLED BRACINGS
Agnese Natali;Francesco Morelli;Walter Salvatore
2022-01-01
Abstract
This paper presents the dissipative capacities of thin-walled reduced-section elements evaluated through an experimental campaign. The reduction of the cross section is introduced to fulfill of hierarchy rules for dissipative structures when these elements are used as diagonals in Automated Rack Supported Warehouses. Indeed, cold-formed thin-walled elements are adopted in these struc-tures, and for these elements the limited bearing capacity of their connections to the other elements does not allow the dissipation of seismic energy through yielding and plastic deformation of diag-onals. The reduction of the cross section is so necessary, allowing to obtain a resistance of the diagonal lower than the bearing capacity. Anyway, it introduces issues related to the local stability of the reduced part. The behavior of this type of elements is firstly numerically predicted, selecting four possible different layouts for the reduced parts. Then, the actual behavior is validated through the execution of an extensive experimental campaign where tensile and compression monotonic tests are per-formed, as well as cyclic ones. The results of the experimental campaign are used for the calibration of the numerical models and the final evaluation of the performance of whole case-study structures where these dissipative elements may be implemented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
