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Seismic retrofit of a steel-reinforced concrete hospital building using continuous energy-dissipative steel columns

  • Received : 2022.05.10
  • Accepted : 2023.04.13
  • Published : 2023.05.25
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Abstract

Seismic retrofit of an existing steel-reinforced concrete hospital building that features innovative use of a continuous energy-dissipative steel column (CEDC) system is presented in this paper. The special system has been adopted to provide an efficient solution taking into account the difficulties of applying traditional intervention techniques to minimize the impact on architectural functionality and avoid the loss of building function and evacuation during the retrofit implementation. The lateral stiffness and strength of the CEDC system were defined based on the geometric and mechanical properties of the steel strip dampers. The hysteretic behavior under cyclic loadings was defined using a simplified numerical model. Its effectiveness was validated by comparing the results of full-scale experimental data available from the literature. All the main design considerations of the retrofitting plan are described in detail. The effectiveness of the proposed retrofitting system was demonstrated by nonlinear time-history analyses under different sets of earthquake-strong ground motions. The analysis results show that the CEDC system is effective in controlling the deformation pattern and significantly reducing damage to the existing structure during major earthquakes.

Keywords

Acknowledgement

The research activity is included in the DPC/RELUIS Project 2019-2021 - WP5: "Rapid, low-impact and integrated retrofit interventions" funded by the Italian Department of Civil Protection (DPC). Part of this study has been developed within the activity commissioned by the National Cancer Institute "G. Pascale Foundation" of Naples to the Department of Architecture and Industrial Design of the University of Campania "Luigi Vanvitelli", aimed at supervising and validating the activity of AIRES Engineering Srl aimed at seismic vulnerability assessment of the Pascale hospital.

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