Title:
Optimization of partially prefabricated HyFRC slabs
Author(s):
Zani, G.; Colombo, M.; Failla, C.; di Prisco, M.
Publication:
Symposium Paper
Volume:
343
Issue:
Appears on pages(s):
215-224
Keywords:
Elevated slab; HyFRC; SFRC; fiber-reinforced concrete; precast concrete; prestressed concrete; structural optimization
DOI:
Date:
10/1/2020
Abstract:
A new partially prefabricated elevated slab has been recently introduced in two different
industrial buildings, to propose a viable alternative to the classical double tee deck with the
addition of an in-situ RC topping. The solution is characterized by an adjustable spacing in the
orthogonal direction, 40 mm thick FRC plates used as predalles and a cast-in-place FRC
finishing, designed according to a continuous slab resting on the simply-supported beams. The
proposed deck is a structural solution that tries to fit different issues like construction speed,
transport and cost reduction, structural optimization, high fire resistance (R120) and quality
performance. All elements are made of SFRC, characterized by different mix designs. This
paper presents a design investigation on this kind of floor element, aimed at optimizing the
global structural solution by minimizing the whole floor weight. Longitudinal and transverse
bending, as well as vibration limit state, were considered in the design. The optimization
strategy will be here presented, through the discussion of the parameters considered in the
design, the variables taken into account and the constraints adopted within the procedure. A
Model Code 2010 design approach was followed.