The present paper proposes a non-iterative design procedure for the design of the seismic retrofit of existing buildings with viscous dampers supported by elasticdeformable braces. For taking into account the brace-damper compliance, dampers are arranged together with the supporting brace in a viscous-elastic assembly that needs to be represented by the Maxwell visco-elastic model. The force deformation relationship of such dampers is described by a first-order differential equation. Herein, a symmetric system of equations for structures installed with Maxwell dampers has been developed by means of state-space representation. This new formulation, together with the control theory is used to select design parameters of both dampers and supporting braces to achieve the preselected target overall structural damping, once mass and stiffness properties of the bare structure are known. The procedure is applied for seismic retrofit of an existing moment resisting steel frame.
A design procedure in state-space representation for seismic retrofit of existing buildings with viscous dampers / Losanno, D.; Zinno, S.; Serino, G.; Londono, J.. - (2015). (Intervento presentato al convegno 15th International Conference on Civil, Structural and Environmental Engineering Computing tenutosi a Prague (Czech Rep.) nel 1-4 September 2015).
A design procedure in state-space representation for seismic retrofit of existing buildings with viscous dampers
Losanno D.;Serino G.;Londono J.
2015
Abstract
The present paper proposes a non-iterative design procedure for the design of the seismic retrofit of existing buildings with viscous dampers supported by elasticdeformable braces. For taking into account the brace-damper compliance, dampers are arranged together with the supporting brace in a viscous-elastic assembly that needs to be represented by the Maxwell visco-elastic model. The force deformation relationship of such dampers is described by a first-order differential equation. Herein, a symmetric system of equations for structures installed with Maxwell dampers has been developed by means of state-space representation. This new formulation, together with the control theory is used to select design parameters of both dampers and supporting braces to achieve the preselected target overall structural damping, once mass and stiffness properties of the bare structure are known. The procedure is applied for seismic retrofit of an existing moment resisting steel frame.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
