11 documents found, page 1 of 2
A lightweight floor system based on sandwich panels: characterization and devel...
Benzo, Pier GiovanniO setor da construção deve continuamente transformar-se de modo a mitigar os riscos associados às alterações climáticas. É crucial promover abordagens de projeto e construção que minimizem as emissões de CO2. As construções modulares e a reabilitação de edifícios existentes podem reduzir o consumo de matérias-primas e de energia, bem como a produção de resíduos. Neste contexto, sistemas de pisos leves são essen...
Development of a foam-filled steel web sandwich panel for the rehabilitation of...
Gontijo, Guilherme Lopes; Filho, Marco Antonio Santiago Abreu; Benzo, Pier Giovanni; Pereira, João Miguel; Machado, José; Denchev, Z.; Sena-Cruz, JoséLightweight sandwich panels offer a prominent solution for the rehabilitation of timber floors. This paper addresses the development of a solution capable of continuous production for a foam-filled steel web sandwich panel for floor rehabilitation. The newly designed flooring solution is tested in full-scale quasi-static flexural campaigns. The tests validate the analytical design’s compliance with Ultimate lim...
Structural response of steel sandwich panels with PUR foam core subjected to ed...
Benzo, Pier Giovanni; Pereira, João Miguel; Sena-Cruz, JoséWith the objective of leading to innovative lightweight structural components in the construction sector using sandwich panels with polyurethane foam and steel face sheets, different studies were conducted on such structures, including experimental, numerical, and analytical campaigns. The experimental campaign includes the mechanical characterisation of the constituent materials and the edgewise compressive te...
Optimization of steel web core sandwich panel with genetic algorithm
Benzo, Pier Giovanni; Pereira, João Miguel; Sena-Cruz, JoséIn civil engineering there is a need for lightweight structural elements, specifically in applications such as the rehabilitation of degraded floors in existing buildings and modular construction. Metaheuristic search procedures are suitable to tackle optimization problems concerning material efficiency, but their use in real design applications is still limited. This paper presents the preliminary design in te...
Multi-objective design optimization of sandwich panel
Benzo, Pier Giovanni; Sena-Cruz, José; Pereira, João MiguelIn the scope of an R&D project a new floor system based on sandwich panel has been developed. The lightweight structural system shall be a competitive solution when compared to traditional rehabilitation technique of degraded timber floors in old buildings. The layout of the sandwich prototypes designed involved the use of steel face sheet and i) steel webs and polyurethane (PUR) foam core system, ii) glass fib...
Physical and mechanical characterization of polyurethane foam core of sandwich ...
Benzo, Pier Giovanni; Gontijo, Guilherme Lopes; Abreu Filho, Marco A.; Dushimimana, Aloys; Oliveira, Sandra Cristina; Denchev, Z.; Pereira, João MiguelSandwich foaming is a manufacturing process in which a liquid monomer mixture is injected on the bottom face sheet of the sandwich panel where it polymerizes to form cross-linked polyurethane (PUR) foam providing an adhesive joint between the bottom and upper metal sheets. The single-step process avoids manual operations in the assemblage of the panel and the use of adhesive. However, the PUR foam in the core o...
Influence of temperature and different post curing conditions on the mechanical...
Abreu Filho, Marco A.; Gontijo, Guilherme Lopes; Oliveira, Sandra Cristina; Benzo, Pier Giovanni; Dushimimana, Aloys; Denchev, Z.; Pereira, João MiguelSandwich panels based on cold-formed-steel (CFS) face sheets and polyurethane foam (PUR) core were designed and manufactured to be used as a feasible solution for the rehabilitation of degraded floors. This panel is manufactured by a continuous process, whereby the polymerization and foaming of the PUR core is performed simultaneously with the face sheets assembling and their adhesive bonding in certain zones. ...
A new lightweight floor system based on sandwich panel
Benzo, Pier Giovanni; Sena-Cruz, José; Pereira, João MiguelA new lightweight floor system was developed to tackle the sustainability issue in the construction sector. The proposed flooring system is suited for rehabilitation of degraded timber floors in existing building. Despite the great potential that sandwich construction shows as load bearing elements their use has been hindered by the high initial cost. Three alternative architecture, all including steel face she...
The effect of surface treatment and environmental actions on the adhesive conne...
Sena-Cruz, José; Correia, Luís; Ribeiro, Filipe; Figueira, Diogo; Benzo, Pier Giovanni; Barros, Joaquim A. O.; Pereira, Eduardo; Valente, Isabel B.An experimental study on the performance of adhesive connection between Glass Fibre Reinforced Polymer (GFRP) plates and Steel Fibre reinforced self-compacting Concrete (FRC) was conducted. Fresh FRC was poured out onto the surface of GFPR plates, to create 40 square specimens (300 by 300 by 45 [mm]). Pull-off tests were performed to evaluate the tensile strength of the adhesive connection when different types ...
Multi-objective optimization assisting design of sandwich panels
Benzo, Pier Giovanni; Sena-Cruz, José; Pereira, João MiguelIn the scope of a R&D project, the design of three new lightweight flooring panels with distinct characteristics was performed, namely: i) two steel face sheets, steel webs and polyurethane (PUR) foam as core system; ii) steel face sheets, glass fiber-reinforced polymer (GFRP) webs and PUR foam core system; iii) two steel face sheets and two steel outer webs enclosing a balsa wood core. The design of these pane...