•    Principal Investigator: Prof. Chiara Bedon
•    Department: Department of Engineering and Architecture
•    Call: Competitive procedure for the development of fundamental research activities of the Italian Science Fund (FIS), Directorial Decree of the MUR n. 2.281 of 28 September 2021
•    CUP: J53C23003050001
•    Host Institution: University of Trieste
•    UniTS Funding: €910,840
 

Abstract: Multilayer laminated glass (LG) components are largely used in buildings, for facade panels, windows, balustrades, slabs and stairs, roofs, under various loading and boundary configurations. Their typical application consists of minimum two glass plates bonded by polymeric interlayers, which are required to keep together glass fragments in case of failure, and thus to enhance safety for people. Compared to other materials for constructions, however, glass is relatively new and highly vulnerable. For this reason, simplified (and limited) calculation models and severely conservative design assumptions are used.

So far, knowledge is rather scarce for the assessment of early design stage performances and residual capacities in case of damage, and even more for in-service structures subjected to additional ageing or unfavourable operational conditions.

In this regard, HOPgLAz project will explore with extended experimental studies at the small- and full-scale the post-breakage parameters of LG components variably composed, loaded, restrained, and even exposed of ageing. Overall, the project will investigate the post-breakage response of various LG members representative of configurations of practical interest. These will include 3 major classes, such as (GC1) LG elements for balustrades, (GC2) windows / facades and (GC3) pedestrian systems, which are characterized by different cross-section parameters but especially load amplitude and time (i.e., crowd pressure for GC1, wind pressure / impact for GC2, walking paths for GC3).

The attention will focus on post-critical mechanical parameters. A novel holistic approach will be formulated on the base of experimental observations, with the support of Finite Element numerical simulations. The definition and reliability of non-destructive protocols to assess and quantify the residual stiffness and strength capacities of damaged LG components will be also explored. The use of anti-shatter films and fibre sensors will be addressed.