Deformability of base connections in shotcreted concrete sandwich load bearing perforated walls. (1st October 2022)

• Record Type: Journal Article
• Authors: Lignola, Gian Piero; Prota, Andrea
• Is Part Of: Engineering structures. Volume 268(2022)
• Publication Date: 2022-10-01
• Subjects: Numerical analyses -- Real scale experimental tests -- Refined modelling -- Sandwich panels; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2022.114720
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Research deals with experimental activity and related theoretical modelling. The wall is made of monolithically casted shotcreted concrete and inner lightweight EPS. The experimental program deals with a real scale perforated wall tested under cyclic loads. A mechanically based formulation is suggested to include the deformability of bonded starter bars. Different modelling approaches to include deformability of starter bars at foundations are compared. Abstract: Fast construction of structural walls made of reinforced concrete for buildings or industrial warehouses in single panel is a cost-effective system in terms of both the quality of construction and the economy. Anti-seismic constructions can be built with additional reduction of heat dispersion and noise attenuation. In this study the structural system is composed of a factory produced corrugated panel of polystyrene covered on both sides by an electro-welded zinc coated mesh of galvanized steel and shotcreted concrete poured to build the vertical structural walls. This system allows economic savings compared to the traditional systems; however, deformability of the base connections can alter significantly the structural behaviour and seismic response. This study deals with both experimental tests on a real scale structure and numerical simulations, with the goal to provide an efficient formulation to model the deformability of base connections in such sandwich concrete structures, while the materials are modelled either linear elastic or nonlinear.