Post-event analysis of industrial structures behavior during L'Aquila earthquake

This contribution refers to both building-like and non-building-like industrial structures. Regarding the former type, L’Aquila earthquake represents the first case in Italy of a wide observation of their seismic response. Industrial buildings are often comprised of reinforced concrete precast elements. The earthquake has shown deficiencies related to inadequate design or construction criteria. In fact, insufficient separation distances between structures (causing pounding), insufficient size of saddles of precast beams and insufficient strength of non-structural infilling panels emerged. Moreover, localized failure of supports of horizontal elements due to insufficient size of saddles and too large concrete cover with respect to design specifications, were observed. Concerning non-building-like structures the investigations refer to the sili, for polypropylene stock, of Vibac in Bazzano close to Onna (AQ). These structures represent an interesting case-study of damages to steel constructions. Some of them experienced total collapse, others suffered local and global buckling. In particular three failure modes occurred:(1) crashing of the shell at the base (elephant foot buckling);(2) deformations due to instability;(3) pounding to close precast reinforced concrete structures.