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Autor(en) Titel Zeitschrift Ausgabe Seite Rubrik
Kuhlmann, Ulrike; Kudla, Konrad Ermüdungsfestigkeit von Lamellenstößen bei Vollwandträgern mit dicken Gurten - Experimentelle und numerische Untersuchungen Stahlbau 3/2015 203-212 Fachthemen

Kurzfassung

Der Beitrag stellt Forschungsergebnisse von experimentellen und numerischen Untersuchungen zur Ermüdungsfestigkeit von Lamellenstößen bei Vollwandträgern mit dicken Gurten vor. Kern der Betrachtung ist der Einfluss der Blechdicken auf die Ermüdungsfestigkeit des als Montagestoß geschweißten Vollstoßes. Die Untersuchungen zeigen, dass der Ort der Kerbe, Stirnfugennaht oder Schweißnahtübergang, die Ermüdungsfestigkeit bestimmt, aber eben auch dass gewisse Ungänzen zum Beispiel an der Stirnfugennaht nicht zwangsläufig zu einer schlechten Kerbfalleinordnung führen. Ausgehend von den durchgeführten Versuchen und numerischen Studien wird eine mögliche Kerbfalleinordnung für den baupraktischen Nachweis hergeleitet.

Fatigue resistance of lamella joints of plated steel girders with thick flanges - experimental and numerical investigations.
Experimental and numerical investigations on the fatigue resistance of lamella joints of plated steel girders with thick flanges This article presents the research results of the experimental and numerical investigations on the fatigue resistance of lamella joints of plated steel girders with thick flanges. The focus lies on the influence of the size plate thicknesses on the fatigue resistance welded butt joint assembled on site. The investigations show that the location of the notch, weld toe or end grove weld, has a strong impact on the fatigue resistance and also that certain irregularities e.g. at the end grove weld do not necessarily lead to a reduction of the detail category. On the basis of the experiments and numerical studies the possible classification into a detail category for the fatigue design is derived for the welded lamella joints.

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Ball, Peter Einwirkungskombinationen für Flachbodentanks nach Eurocode - Teil 1 Stahlbau 3/2015 213-220 Fachthemen

Kurzfassung

Aufgrund ihrer Konstruktionsweise stellen Flachbodentanks eine besondere Bauform mit komplexem Tragverhalten dar. Der Aufwand für bautechnische Standsicherheitsnachweise ist hierfür mit Einführung des Eurocodes teilweise weiter gestiegen. Zum einen ergeben sich neue, von der DIN 18800 abweichende Regeln für die Kombination von Lasten. Zum anderen sind nicht alle Punkte klar geregelt bzw. zwischen den einzelnen Normen abgestimmt. Dies führt sowohl bei Statikern und Herstellern als auch bei Betreibern mitunter zu erheblicher Unsicherheit. Im Folgenden werden die Regeln für Einwirkungskombinationen für Flachbodentanks mit dem Ziel diskutiert, eine einheitliche Anwendung und ein praxisgerechtes, allgemein abgestimmtes Vorgehen zu begleiten.

Load combinations for flat-bottom storage tanks according to the Eurocode.
Due to their design, flat-bottom storage tanks are a special type of structure with complex loadbearing characteristics. With the introduction of the Eurocode, the requirements for the verification of stability have increased in some regards. On the one hand, there are new rules for the combination of loads that differ from DIN 18800. On the other hand, not all aspects are unambiguously defined within and across individual standards. This leads to significant uncertainty amongst structural engineers and manufacturers as well as operators. This article discusses the rules for load combinations for flat-bottom storage tanks with the aim of facilitating a unified application and a practical, well-coordinated approach.

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Rubin, Helmut Lösung und Gewinner der Weihnachtspreisaufgabe 2014 Stahlbau 3/2015 220-223 Berichte

Kurzfassung

Keine Kurzfassung verfügbar.

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Aktuell: Stahlbau 3/2015 Stahlbau 3/2015 224-228 Aktuell

Kurzfassung

Architektur mit Rhythmus: Einkaufszentrum in Kolumbien mit Membran-Folien-Dächern
Deutscher Fassadenpreis für VHF 2015 ausgelobt
iF Design Award für V-Profilkran
Neueste Erkenntnisse zum Schneiden und Schweißen
Ingenieurpreis 2015 verliehen
Internationales Membran-Symposium

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Firmen und Verbände: Stahlbau 3/2015 Stahlbau 3/2015 228-229 Firmen und Verbände

Kurzfassung

Stefan Hiermaier neuer Institutsleiter des Fraunhofer EMI
Neue Broschüre “VHF im Fokus - Nachhaltiges Bauen“
DVS-Richtlinie unterstützt praxisorientierte Ausbildung zur “Fachkraft für Metalltechnik“
Ausschreibungstexte zum Feuerverzinken nach DIN EN ISO 1461 erschienen

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Termine: Stahlbau 3/2015 Stahlbau 3/2015 229-230 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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Content: Steel Construction 3/2015 Steel Construction 3/2015 Content

Kurzfassung

Keine Kurzfassung verfügbar.

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Heinisuo, Markku; Mäkinen, Jari Nordic Steel Construction Conference 2015 Steel Construction 3/2015 145 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Janarthanan , Balasubramaniam; Mahendran, Mahen; Gunalan, Shanmuganathan Bearing capacity of cold-formed unlipped channels with restrained flanges under EOF and IOF load cases Steel Construction 3/2015 146-154 Articles

Kurzfassung

Bearing failure is a form of localized failure that occurs when thin-walled cold-formed steel sections are subjected to concentrated loads or support reactions. To determine the bearing capacity of cold-formed channel sections, a unified design equation with different bearing coefficients is given in the current North American specification AISI S100 and the Australian/New Zealand standard AS/NZS 4600. However, coefficients are not available for unlipped channel sections that are normally fastened to supports through their flanges. Eurocode 3 Part 1.3 includes bearing capacity equations for different load cases, but does not distinguish between fastened and unfastened support conditions. Therefore, an experimental study was conducted to determine the bearing capacities of these sections as used in floor systems. Twenty-eight web bearing tests on unlipped channel sections with restrained flanges were conducted under End One Flange (EOF) and Interior One Flange (IOF) load cases. Using the results from this study, a new equation was proposed within the AISI S100 and AS/NZS 4600 guidelines to determine the bearing capacities of cold-formed unlipped channels with flanges fastened to supports. A new design rule was also proposed based on the direct strength method.

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News: Steel Construction 3/2015 Steel Construction 3/2015 154 News

Kurzfassung

Workshop “Large Valorisation on Sustainability of Steel Structures”
Workshop on Trends and Challenges for Wind Energy Harvesting

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Andreassen, Michael Joachim; Jönsson, Jeppe Joint and column behaviour of slotted cold-formed steel studs Steel Construction 3/2015 155-161 Articles

Kurzfassung

Slotted cold-formed steel studs are used in loadbearing external plasterboard walls. The cold-formed steel studs in these walls are supported by and joined to track sections at the top and the bottom. This paper describes the compression testing of the loadbearing studs in order to observe the behaviour of the studs and the track joints. The experiments included a joint design with a special web stiffener used in practice. The studs were C-sections and the tracks were U-sections. Eight different test series were performed. Each test series had different column lengths and thicknesses, both with and without web stiffeners, in order to establish the influence of these on the joint behaviour and loadbearing capacity of the slotted cold-formed steel studs.

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News: Steel Construction 3/2015 Steel Construction 3/2015 161 Completed Phd theses

Kurzfassung

Behaviour of cylindrically curved steel panels under in-plane stresses
Robustness of car parks subjected to localized fire

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Luís Simões da Silva Steel Construction 3/2015 161 People

Kurzfassung

Keine Kurzfassung verfügbar.

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Aarønæs, Anton; Nilsson, Hanna; Neumann, Nicolas Dynamic response of steel pipe rack structures subjected to explosion loads Steel Construction 3/2015 162-166 Articles

Kurzfassung

This paper describes a parametric study of the dynamic behaviour of steel pipe rack structures subjected to explosion loading. The pipe rack design is assumed to be a multi-planar lattice girder consisting of rectangular or square hollow sections. Numerical analysis with the finite element method was performed on a series of 54 pipe racks in total, varying parameters such as mass distribution and aspect ratio. The study provides a deeper understanding - and forms the basis for a more accurate prediction - of the dynamic response of multi-planar lattice girder structures such as steel pipe racks.

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Braun, Matthias; Obiala , Renata; Odenbreit, Christoph Analyses of the loadbearing behaviour of deep-embedded concrete dowels, CoSFB Steel Construction 3/2015 167-173 Articles

Kurzfassung

The development of the “CoSFB-Betondübel” is presented in this paper. The “CoSFB-Betondübel” is a deep-embedded concrete dowel connecting in situ concrete with a steel section to assure composite action and thus allow for composite beam design. The loadbearing behaviour and parameters influencing this behaviour were determined through experimental tests. Special focus was given to the influence of the ratio of the resistance of the concrete dowel to the concrete compression class. The evaluation of the results concluded in a National Technical Approval [1]. Further investigations were performed via FE analysis in ABAQUS. Further, 3D models with non-linear material and geometry were prepared and validation undertaken. In addition, a real application example of CoSFB is shown.

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Hämäläinen, Olli-Pekka; Björk, Timo Fretting fatigue phenomenon in bolted high-strength steel plate connections Steel Construction 3/2015 174-178 Articles

Kurzfassung

Fretting fatigue is a major obstacle for bolted joints used as an alternative to welding. Several studies of the subject so far have concerned aluminium or titanium joints, but due to the recently developed high-strength steels that can be challenging to weld, the steel industry would also like to explore this field. This paper presents the experimental fatigue test results of double-lap joints in S355 and S960QC steels. The results are compared and analysed using the SWT parameter and an FE model of the test specimen. The noticeable difference in fretting fatigue behaviour of these materials will be explained and the controversial crack initiation issue addressed.

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News: Steel Construction 3/2015 Steel Construction 3/2015 178 News

Kurzfassung

Offshore Structures Course
EcoSteelPanel

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Schillo , Nicole; Feldmann , Markus Local buckling behaviour of welded box sections made of high-strength steel - Comparing experiments with EC3 and general method Steel Construction 3/2015 179-186 Articles

Kurzfassung

One aim within the RFCS-funded RUOSTE research project was to study the effects of high-strength steel properties on local buckling. The respective parameters were investigated on 34 stub column specimens. The specimens were made of S500MC, S700MC and S960MC, with a non-dimensional local slenderness varying between 0.64 and 1.55. Extensive imperfection measurements were undertaken and analysed. The specimens were then used in stub column tests to investigate the local buckling behaviour. The results were first compared with the resistance curve of the current Eurocode (EC), which was shown to be rather optimistic, especially towards the slender end of the range. Secondly, the results were compared with the general method, which uses an equivalent imperfection approach.

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"Le Bois aux Daims", Center Parc, Poitou-Charentes Steel Construction 3/2015 186 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Steige, Yvonne; Weynand, Klaus Design resistance of end plate splices with hollow sections Steel Construction 3/2015 187-193 Articles

Kurzfassung

This paper presents a design approach for calculating rectangular hollow section (RHS) splices (bolted end plate connections) under tension forces or bending moments in accordance with EN 1993-1-8. Based on models available in the literature, a Eurocode-conform model is presented using the component method. The original model, based on experimental and numerical investigations, uses a three-dimensional yield line method to predict the tension resistance of bolted splices with hollow sections considering the joint as a whole. The adapted model is fully compatible with EN 1993-1-8. Moreover, the original model has been extended to predict also the design moment resistance of such RHS splices.

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Döring, Bernd; Reger, Vitali; Kuhnhenne, Markus; Feldmann , Markus; Kesti, Jyrki; Lawson, Mark; Botti, Andrea Steel solutions for enabling zero-energy buildings Steel Construction 3/2015 194-200 Articles

Kurzfassung

The European Directive on the Energy Performance of Buildings (EPBD) obliges the member states to ensure that, by 31 December 2020, all new buildings are nearly zero-energy buildings (nZEB). This paper presents solutions for steel-intensive commercial buildings that achieve this requirement. Several key components such as façades, floor systems and steel piles for ground energy storage were investigated in detail using numerous numerical simulations and practical tests of selected options. Furthermore, options for a whole building which fulfil the zero-energy building approach were identified for different European climates by performing a parametric study using a thermal building simulation tool.

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Stranghöner , Natalie; Jungbluth , Dominik Fatigue strength of marked steel components - Influence of durable marking methods on the fatigue strength of steel components Steel Construction 3/2015 201-209 Articles

Kurzfassung

According to EN 1090-2, steel components have to be identifiable and traceable throughout the whole production chain. The choice of identification method is not specified consistently in international rules and standards. In terms of durability and liability, markings should be resistant to particular fabrication processes such as sandblasting, hot-dip galvanizing or coating. The methods are hard stamping, scribing, plasma marking and needling. The effect of the notch caused by the marking process on the fatigue strength of the components has not yet been investigated in detail. As a result, a classification of the notch details in the European detail categories of EN 1993-1-9 is, in principle, impossible. For these reasons, the influence of durable marking methods on the fatigue strength of steel components needs to be clarified by experimental fatigue tests currently being performed at the Institute for Metal and Lightweight Structures, University of Duisburg-Essen. Part of this investigation involves examining the different surface conditions of hard-stamped, scribed, plasma-marked and needled specimens. The experimental investigations are being carried out considering two different steel grades, S355J2 and S460N, and three different steel plate thicknesses, 15, 25 and 40 mm.

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Kido , Ewa Maria; Cywin´ski, Zbigniew The new steel-glass architecture of passenger service centres on expressways in Japan Steel Construction 3/2015 210-215 Report

Kurzfassung

Nowadays, modern expressways worldwide are becoming very important arteries for the quick and safe transportation of people and goods. Service centres are located along these roads for the convenience of drivers and passengers. Those centres consist of buildings and other infrastructure elements and provide various services. Usually, buildings represent contemporary trends in architecture and structural engineering. Steel and glass are widely used. This is also the case in Japan but, simultaneously, adequate approaches are being made to respect the country’s own traditions as well. This paper is a continuation of the authors’ previous publications [1], [2], [3] devoted, respectively, to buildings, railway stations and air terminals.

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ECCS News: Steel Construction 3/2015 Steel Construction 3/2015 215-219 ECCS News

Kurzfassung

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Danube City Tower: Semi-active dampers respond to various load cases Steel Construction 3/2015 219-220 News

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