Pressurized fluid viscous damper-based seismic retrofit hypotheses of a pre-normative steel school building

Two alternative seismic protection technologies, and relevant hypotheses of application to the retrofit of an Italian prenormative steel school building, are examined in this paper. The two technologies consist in a dissipative bracing system, and a damped cable system, both incorporating pressurized fluid viscous dampers as protecting devices. The essential characteristics and performance of the two systems, along with their analytical/computational modelling criteria, are recalled in the first part of this paper. The dimensions, layouts and locations selected for the constituting elements of the two rehabilitation solutions are then discussed. A synthesis of the nonlinear dynamic analyses and performance-based evaluations carried out on the case study building in original and protected conditions is finally proposed.