Abstract. Damped interconnection represents an advanced strategy to mitigate the effects of seismic pounding between adjacent structures built at poor mutual distance. The effects of pounding can be particularly severe in slender R/C structures, including civic or bell towers. An emblematic case study falling in this class of structures, i.e. a monumental R/C bell tower constructed in the early 1960s in Florence, is analyzed in this paper. In order to assess the effects of pounding, a non-linear dynamic finite element enquiry was carried out by simulating collisions between the tower and the adjacent masonry church with a multi-spring-damper viscoelastic contact model, originally implemented in this study. The survey results show that pounding affects the seismic response of the two buildings as early as an input seismic action scaled at the amplitude of the normative basic design earthquake level. A damped interconnection-based retrofit hypothesis to prevent pounding is then proposed, which consists in linking the two structures by means of a pair of fluid-viscous dissipaters. Thanks to the added damping produced by these devices, the impacts are totally annulled, bringing the structural members of the tower to safe levels.

Damped interconnection-based mitigation of seismic pounding between a R/C tower and a masonry church / Pratesi, F; Sorace, S; Terenzi, G. - STAMPA. - 1558:(2013), pp. 2466-2469. (Intervento presentato al convegno 11th International Conference of Numerical Analysis and Applied Mathematics 2013 tenutosi a Rhodes, Greece nel 21-27 September 2013) [10.1063/1.4826040].

Damped interconnection-based mitigation of seismic pounding between a R/C tower and a masonry church

PRATESI, FABIO;TERENZI, GLORIA
2013

Abstract

Abstract. Damped interconnection represents an advanced strategy to mitigate the effects of seismic pounding between adjacent structures built at poor mutual distance. The effects of pounding can be particularly severe in slender R/C structures, including civic or bell towers. An emblematic case study falling in this class of structures, i.e. a monumental R/C bell tower constructed in the early 1960s in Florence, is analyzed in this paper. In order to assess the effects of pounding, a non-linear dynamic finite element enquiry was carried out by simulating collisions between the tower and the adjacent masonry church with a multi-spring-damper viscoelastic contact model, originally implemented in this study. The survey results show that pounding affects the seismic response of the two buildings as early as an input seismic action scaled at the amplitude of the normative basic design earthquake level. A damped interconnection-based retrofit hypothesis to prevent pounding is then proposed, which consists in linking the two structures by means of a pair of fluid-viscous dissipaters. Thanks to the added damping produced by these devices, the impacts are totally annulled, bringing the structural members of the tower to safe levels.
2013
11th International Conference of Numerical Analysis and Applied Mathematics 2013
11th International Conference of Numerical Analysis and Applied Mathematics 2013
Rhodes, Greece
21-27 September 2013
Pratesi, F; Sorace, S; Terenzi, G
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/835131
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