(material) imperfections (e.g., residual stresses). Besides, due to high width-to-thickness ratio of I-section steel members, local buckling occurs [ 2 ]. These imperfections considerably affect the behavior of steel members and reduce their buckling
Portable handheld X-Ray Fluorescence Spectroscopy (pXRF) is very effective and widely used technique for chemical analysis in field of archaeometry. The most advantageous feature of this technique is the possibility of analysing objects, artefacts on the spot without any sample-taking. In this study raw materials of 31 buckles from 7th century AD made of various kinds of bronze and silver alloys were analyzed to check similarities or differences between these objects via chemical analysis. Concentration ratios and distributions of alloying (Cu, Sn, Pb, Ag) and minor elements (Sb, Bi, Zn, Au) in material of bronze artifacts may have useful information suggesting important data about provenance and technology. Our recent study 27 bronze and 4 silver buckles were analyzed by pXRF and the results were used in statistical evaluation in order to get closer to provenance of raw materials and alloying technologies.
Authors:Monika Nagyová, Martin Psotný, and Ján Ravinger
An actual problem of fabrication of pre-stressed concrete prefabricated elements is presented in this article. The steel form could be more than 100 m long. Inserting the polystyrene plates ten or more prefabricates can be produced in one step. The horizontal deformations represent a special problem. The simplification of the elastic support as the friction effect is introduced. The non-linear solution has been used.
of buckling in different temperature conditions and used Euro Code 3 Part 1–2 to determine the design load. Kodur and Dwaikat [ 8 ] used ANSYS Code to analyze the behavior of beam-column under high temperature conditions and determined the factors
— G. Szenthe : Archaeometrical studies on some bronze buckles with portable (handheld) XRF spectroscopy . ActaArchHung 66/2 ( 2015 ) pp. 379 – 386 .
Mithay 1995 S. Mithay : Bronz-, avar és középkori leletek Bakonytamási