The resistance of compression members may be calculated by the design buckling resistance based on the reduction factor χ, which depends on the slenderness, or by the cross‐section resistance based on internal forces according to a second‐order analysis taking into account equivalent initial bow imperfections as well. The second way is especially advantageous in the case of axial forces and bending. Values for equivalent initial bow imperfections are given in codes such as Eurocode 3 [5] or DIN 18800 [4]. For comparison, initial bow imperfections are derived here from the buckling curves for compression members with different cross‐sections, buckling directions and steel grades based on different types of cross‐sectional interaction. The results are discussed and commented with regard to the design of compression members. Furthermore, investigations are carried out for cases of axial compression and bending moments My or Mz. Data available from ultimate load calculations are used for comparison. The consequences for the assumed design verification according to second‐order theory are discussed and a proposal is presented.
World trade is steadily increasing, leading to a high demand for economic solutions for quay walls. The combined steel pile wall is the most common steel construction solution. The primary elements are king piles, while intermediate piles function as secondary elements. The design of these secondary elements is governed by section 5.5.2 of EN 1993-5 [9]. The test-based method described in section 5.5.2(5) and (6) is used to generate the characteristic water pressure resistance values of the different combinations of I-shaped king and Z-shaped intermediate piles, each in different steel grades, which are given in the product catalogue of ArcelorMittal [1]. The test series executed and the subsequent setting-up and validation of a numerical model are presented in detail in this paper. A numerical model was used for a parametric study. The different failure modes observed in this parametric study are presented. A statistical evaluation according
Herrn Univ.‐Prof. em. Dr.‐Ing. habil. Joachim Lindner zur Vollendung seines 80. Lebensjahres gewidmet
Der steigende Welthandel führt zu einer deutlichen Erweiterung und Verstärkung von Seehafenanlagen und damit zu einem zunehmenden Einsatz von Kaimauern mit tiefen kombinierten Stahlspundwänden. Horizontale Lasten, die überwiegend aus Grundwasserdruck kommen, werden von Z‐förmigen Zwischenbohlen über spezielle Schlossprofile an I‐förmige Tragbohlen weitergeleitet und dann in den Baugrund abgetragen. Der Nachweis der Zwischenbohlen ist in DIN EN 1993‐5 geregelt. Die dort aufgeführte versuchsbasierte Methode liefert die genauesten und damit wirtschaftlichsten Ergebnisse. Dieser Beitrag zeigt, wie mit dieser Methode für das HZ‐M/AZ‐System [2] in Solllage Wasserdruckwiderstände hergeleitet wurden. Einflüsse bei der Herstellung führen in der Realität aber immer wieder zu Abweichungen von der Solllage, die die Zwischenbohlen ausgleichen müssen. In diesem Beitrag wird der Einfluss einer Streckung einer Spundwand in Wandrichtung und damit einer Erhöhung des Systemmaßes untersucht. Dabei wird zunächst die Streckung an sich analysiert und als zweites wird das Tragverhalten des gestreckten Systems mit dem des Systems in Solllage verglichen.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.