International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Due to intense climate change, the concept of constructing buildings that ensure a reduced carbon footprint is a priority in EU Member States. In EU countries, the construction of new buildings according to the principle of zero energy consumption will be mandatory in the coming years. The use of highly thermally efficient building materials and high product quality is one of the main objectives for green building requirements. The company Tehnoplast profili d.o.o. from Zagreb develops industrially manufactured prefabricated houses with near-zero energy consumption using innovative prefabricated wall/ceiling composite panels. The innovative structural panels consist of an outer gypsum fibreboard, a thin-walled steel panel core and a polyurethane foam in between. In cooperation with the Faculty of Civil Engineering at the University of Rijeka and the company Palijan d.o.o. from Zagreb, several test programmes were carried out, focusing on the definition of design models for the resistance of the innovative composite panels and their connection. Such design models are not provided for in the current EU building regulations. This article presents the testing of the materials of the panel components as well as tests carried out on the panels and their connections with the aim of determining the relevant parameters for the definition of design models for resistance.

The paper deals with an experimental measurement of the fatigue operating life of a specimen from the aluminium AlMgSi07 alloy on a built testing equipment, into which the welded joint was implemented. An importance of the measurement is in a comparison of achieved results with the same material, which was not subjected to welding. The result of the research is verification of the influence of welding on the fatigue operating life of the concrete material at torsion stress.