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.
A Direct Design Methodology for the Seismic Retrofit of Existing Buildings with Dissipative Systems / Pier Paolo Diotallevi; Luca Landi; Simone Lucchi. - STAMPA. - (2013), pp. 113-124. (Intervento presentato al convegno CAN’2013AES-ATEMA 14th International Conference tenutosi a Toronto (CANADA) nel August 05-09, 2013).
A Direct Design Methodology for the Seismic Retrofit of Existing Buildings with Dissipative Systems
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 action.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
