The research presented in this paper deals with the seismic retrofitting of existing frame structures by means of passive energy dissipation. An iterative displacement-based procedure, based on capacity spectrum is described and some applications are discussed. The procedure can be used with any typology of dissipative device and for different performance targets. In this work the procedure has been applied to an existing r.c. frame building, which shows both vertical and plan irregularities. In the application presented the buckling restrained braces have been used in order to prevent damages to both the structure and non structural elements. The evaluation of commonly Nonlinear Static Procedures (NSPs) for seismic response of the existing and retrofitted structure is presented to check the suitability of the use of NSP in the design procedure: the use of conversional NSPs to be not suitable for the case of irregular building but, once this building is retrofitted, and therefore regularized, with a bracing system, the use of NSPs for seismic response of the braced structure is effective.
Bergami, A.V., Nuti, C. (2014). A design procedure of dissipative braces for seismic upgrading structures. 2ECEES Second European conference on earthquake engineering and seismology. In proceedings of: 2ECEES Second European conference on earthquake engineering and seismology.
A design procedure of dissipative braces for seismic upgrading structures. 2ECEES Second European conference on earthquake engineering and seismology
BERGAMI, ALESSANDRO VITTORIO;NUTI, CAMILLO
2014-01-01
Abstract
The research presented in this paper deals with the seismic retrofitting of existing frame structures by means of passive energy dissipation. An iterative displacement-based procedure, based on capacity spectrum is described and some applications are discussed. The procedure can be used with any typology of dissipative device and for different performance targets. In this work the procedure has been applied to an existing r.c. frame building, which shows both vertical and plan irregularities. In the application presented the buckling restrained braces have been used in order to prevent damages to both the structure and non structural elements. The evaluation of commonly Nonlinear Static Procedures (NSPs) for seismic response of the existing and retrofitted structure is presented to check the suitability of the use of NSP in the design procedure: the use of conversional NSPs to be not suitable for the case of irregular building but, once this building is retrofitted, and therefore regularized, with a bracing system, the use of NSPs for seismic response of the braced structure is effective.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
