Issue 48

M. L. Puppio et alii, Frattura ed Integrità Strutturale, 48 (2019) 706-739; DOI: 10.3221/IGF-ESIS.48.66

Figure 14: Southwest view, School entrance. [23] Through the original design documents, it was possible to assess the material, the cross-section and the reinforcements corresponding to each structural element. The building is characterized by a high seismic vulnerability; in fact, the structure is irregular in height and the beams are stronger than the columns (without respecting the hierarchy of resistance). The structure does not respond in a global way to seismic action (plane frames). Therefore, consolidation is planned through an external bracing system. 4 inverted V-braces (Fig. 15 and Fig. 16) are provided in the x direction and 4 in the y direction.

Figure 15: View of the inverted V-bracing system (Direction y).

The position of the bracing has been established considering the constraints imposed by the existing structure and the results of the vulnerability analysis of the building. The braces in the x direction have been placed in the most critical areas, i.e. near the edge beams. For both directions, the authors have tried to keep the intervention outside the building. Fig. 16 shows the plan disposition.

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