The seismic adjustment of the Santobono Pavilion, located at the P.O. Santobono of the A.O.R.N. Santobono-Pausillipon in Naples, is part of the investment axis M6.C2 1.2. The project involves structural reinforcement with targeted interventions and the construction of three strategically positioned dissipative towers to optimize the building’s response to earthquakes. These towers, equipped with devices at the base, reduce seismic stress by ensuring the safety of the structure without interrupting hospital activities. In addition, due to interference with existing terraces, a reorganization of adjacent outdoor areas is planned. To reduce the visual impact, the towers will be shielded with a metal substructure and panels made of stretched aluminium mesh. The decorative element of a giraffe, designed to harmonize with the pediatric environment, also gives the intervention an aesthetic value.
The building is on an “L” plan and comprises two structural units: an original installation in reinforced concrete, built in the 60s, and a steel superstructure built in the 80s, which extends over seven floors. The project takes into account the criticalities due to the lack of seismic regulations at the time of construction and the structural design based on gravitational and wind loads. The dynamic analysis showed significant torsional displacements, while the tests on the state of conservation found a good condition of the reinforced concrete structures and signs of limited oxidation in the metal parts most exposed to atmospheric agents.
The seismic adjustment involves the insertion of three dissipative towers with indirect foundations, connected to the superelevation by steel trusses with bracings to improve their stability. Steel double pendulum supports will be installed at the base of each tower, while eight “bradt” seismic heatsinks per tower, positioned along the corner pillars and in the centre of each side, will absorb the stresses. To reinforce the existing structure, FRP carbon fibre fabrics will be applied on beams, pillars and lift core, ensuring increased safety without compromising hospital functionality.
