This paper presents the results of a case study carried out to verify the effectiveness, for the mitigation of the seismic effects, of placing viscous dampers so that they can connect the corresponding storeys of two portions of the same building (i.e. the frame structure and the lateral-resisting elements). The case study is developed with reference to an 18-storey building structure (new city hospital) currently under construction in Bologna, Italy. The structure is composed of a central non moment-resisting steel frame and two lateral-resisting elements of reinforced concrete (concrete cores). Firstly, the dynamic behavior of the reference structure (as “originally” designed with rigid connection between steel frames and concrete cores) is evaluated. Secondly, it is evaluated the dynamic behavior of the structure, as equipped with viscous dampers connecting the steel frames and the concrete cores. This viscous dampers are coupled in parallel with a flexible connection and are inserted in the structure so that they can perform along both axes in plan. The results obtained indicate that positioning viscous dampers at the connection between the concrete cores and the steel frame allows to obtain substantial improvement in the seismic performances (roughly 50% reduction in the values of peak top-storey displacements, peak base shears and peak base bending moments) with respect to those offered traditional structural system. Finally a cost-accounting shows that the improved seismic performances of the damped structure do not come at the expense of higher construction costs (the savings in the structural members compensate the additional costs of the dampers).

Effectiveness of linking non moment-resisting steel frame structures and lateral-resisting concrete cores with viscous dampers for the mitigation of the seismic effects / Ceccoli C.; Trombetti T.; Silvestri S.; Gasparini G.; Frascari A.. - ELETTRONICO. - (2005).

Effectiveness of linking non moment-resisting steel frame structures and lateral-resisting concrete cores with viscous dampers for the mitigation of the seismic effects

CECCOLI, CLAUDIO;TROMBETTI, TOMASO;SILVESTRI, STEFANO;GASPARINI, GIADA;
2005

Abstract

This paper presents the results of a case study carried out to verify the effectiveness, for the mitigation of the seismic effects, of placing viscous dampers so that they can connect the corresponding storeys of two portions of the same building (i.e. the frame structure and the lateral-resisting elements). The case study is developed with reference to an 18-storey building structure (new city hospital) currently under construction in Bologna, Italy. The structure is composed of a central non moment-resisting steel frame and two lateral-resisting elements of reinforced concrete (concrete cores). Firstly, the dynamic behavior of the reference structure (as “originally” designed with rigid connection between steel frames and concrete cores) is evaluated. Secondly, it is evaluated the dynamic behavior of the structure, as equipped with viscous dampers connecting the steel frames and the concrete cores. This viscous dampers are coupled in parallel with a flexible connection and are inserted in the structure so that they can perform along both axes in plan. The results obtained indicate that positioning viscous dampers at the connection between the concrete cores and the steel frame allows to obtain substantial improvement in the seismic performances (roughly 50% reduction in the values of peak top-storey displacements, peak base shears and peak base bending moments) with respect to those offered traditional structural system. Finally a cost-accounting shows that the improved seismic performances of the damped structure do not come at the expense of higher construction costs (the savings in the structural members compensate the additional costs of the dampers).
2005
Proceedings of the 3rd Specialty Conference on “The Conceptual Approach to Structural Design”, CDS05, Singapore, August 25-26, 2005.
Effectiveness of linking non moment-resisting steel frame structures and lateral-resisting concrete cores with viscous dampers for the mitigation of the seismic effects / Ceccoli C.; Trombetti T.; Silvestri S.; Gasparini G.; Frascari A.. - ELETTRONICO. - (2005).
Ceccoli C.; Trombetti T.; Silvestri S.; Gasparini G.; Frascari A.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/8325
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