This paper describes a simplified procedure to calculate the supplemental damping ratio that must be provided in order to rehabilitate existing buildings with viscous dampers. The proposed method is based on the construction of constant design acceleration curves. These curves allow to estimate the required effective damping as a function of the effective period, associated to the secant stiffness at maximum displacement. Combining these curves with constant ductility curves, which provide a correlation between the effective damping and the supplemental damping for given available ductility and damper typology, it is possible to determine the required supplemental damping and to design the damping system. The proposed method has then been verified through nonlinear dynamic analyses considering a set of RC plane frames. Finally it has been applied to a case study regarding an existing building located in Italy and designed without considering the earthquake action
SEISMIC RETROFIT OF EXISTING BUILDINGS WITH VISCOUS DAMPERS: A DIRECT PROCEDURE FOR THE DETERMINATION OF THE REQUIRED SUPPLEMENTAL DAMPING / PIER PAOLO DIOTALLEVI; LUCA LANDI; SIMONE LUCCHI. - STAMPA. - 2:(2013), pp. St-170-494.1761-St-170-494.1766. (Intervento presentato al convegno Seventh International Structural Engineering and Construction Conference tenutosi a University of Hawaii at Manoa, Honolulu nel June 18-23, 2013) [10.3850/978-981-07-5354-2St-170-494].
SEISMIC RETROFIT OF EXISTING BUILDINGS WITH VISCOUS DAMPERS: A DIRECT PROCEDURE FOR THE DETERMINATION OF THE REQUIRED SUPPLEMENTAL DAMPING
DIOTALLEVI, PIER PAOLO;LANDI, LUCA;
2013
Abstract
This paper describes a simplified procedure to calculate the supplemental damping ratio that must be provided in order to rehabilitate existing buildings with viscous dampers. The proposed method is based on the construction of constant design acceleration curves. These curves allow to estimate the required effective damping as a function of the effective period, associated to the secant stiffness at maximum displacement. Combining these curves with constant ductility curves, which provide a correlation between the effective damping and the supplemental damping for given available ductility and damper typology, it is possible to determine the required supplemental damping and to design the damping system. The proposed method has then been verified through nonlinear dynamic analyses considering a set of RC plane frames. Finally it has been applied to a case study regarding an existing building located in Italy and designed without considering the earthquake actionI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
