Abstract:This article presents the results of the statistical research of the mechanical properties of sheets of Polish grades DX51D, DX52D and DX53D, made of low carbon steel for cold forming, continuously hot-dip coated. DX-type sheets, in particular DX51D, produced according to standard EN 10346 [4], can be used, inter alia, to produce corrugated metal sheets and sandwich panels. Standard EN 10346 [4] does not give at all, or gives in the form of very wide intervals, strength parameters for sheets of DX type. Characteristic and design values of yield strength and tensile strength have been presented in the article. Also, the values of partial factors for DX-type steel have been analyzed.
Abstract:The paper summarizes microstructures and, associated with them, the physical and technological properties of structural stainless steel covered by EN 1993-1-4 [4]. Recommendations of the code [4] concerning the modelling of stainless steel properties are also described.
Abstract:In the paper, the mechanical properties of structural stainless steels referred to in EN 1993-1-4 [6] used in the design of building structures and civil engineering works, are described. Some information about stainless steel behaviour at elevated temperatures is also given.
Abstract:This paper comments on the calculations algorithm and presents examples of the determination of local transverse resistance of the web for trapezoidal sheets according to the rules given in the standard PN-EN 1993-1-3 [4]. The calculations were carried out for different support widths and thicknesses of the stiffened and unstiffened webs of trapezoidal sheets. The results obtained in the calculations show a distinctly positive influence of the increase of the support widths on the local transverse resistance of the web of trapezoidal sheets.
Abstract:An analysis of the influence of residual stresses on material fatigue is presented in this paper. Residual stress distribution in railroad rails subjected to simulated service loads is considered. A mechanical model based on the plastic shakedown theory was used to determine residual stresses and the Dang Van fatigue criterion was applied.
Abstract:The design of aluminum structures, according to the modern generation of European standards, sets new requirements regarding the reliability management of such facilities before the authors of architectural and structural designs. Reliability problems should be formulated at an early stage of the investment process ‒ the construction design, in a clear manner, requiring the authors of detailed designs and contracting companies to provide structures exhibiting the operating parameters in agreement with the expectations of the investor. The basics of substantive and formal requirements in this respect are set out in Eurocode PN EN 1990 and the European standards dealing with the manufacturing and erection of structures. Problems of modern reliability management for aluminum structures are referred to the case of large volume buildings subject to climate actions.
Abstract:The paper presents an analysis of the effect of load variations on the bearing strength of connection in steel–concrete elements with flexible connectors in the form of bolts. Data relating to the residual stresses from concrete slab shrinkage have been included in the analysis. The results of the author’s experiments on the effect of variable loads on the bearing strength of the connection have been discussed following the author’s experimental studies. Following the analysis of the results, it can be stated that the bearing strength of a connection with flexible connectors is significantly affected by the rigidity of the steel girder and slab (coefficient δ) together with the parameters of load cycles (κ, R) and the value of concrete shrinkage strain.
Abstract:The paper outlines the details of the design and difficulties that had to be overcome in the course of the renovation and adaptation of a rich German factory owner’s residence from 1912, which in 1988 was entered into the register of historic buildings of the Warmia and Mazury region.
