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Göppert, Knut; Paech, ChristophHigh-performance materials in façade design - Structural membranes used in the building envelopeSteel Construction4/2015237-243Articles

Kurzfassung

Modern materials are used throughout large building envelopes of today’s and tomorrow’s architecture. Freedom in form combined with the growing selection of materials make this application very popular. Material properties are presented and discussed to allow the specialist engineer to make the right decision when consulting owners and architects. Basic considerations and requirements can take the form of a checklist to make sure that all involved in the design process have the full background and understanding of this process. The presented case studies show a variety of solutions, including some typical material combinations. Clients will be convinced by what they see, and the examples provide an opportunity to further develop the subject, starting from a good base and understanding. The examples cover all common materials and methods, including ETFE, glass-PTFE, PVC polyester, glass-PTFE mesh as well as multi-layer insulated systems.

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Gibson, Nick D.How to get a membrane structure off the drawing boardSteel Construction4/2015244-250Articles

Kurzfassung

This paper highlights the processes that are required to take a membrane structure from the design stage to final fabrication. Those processes involve determining the final geometry, developing an approved seam layout, undertaking material tests to determine stretch characteristics and issuing a final set of fabrication documents. The importance of each step is highlighted and the particular issues as they relate to membrane structures are presented. Particular note is made of the benefit that previous experience in this unique form of construction has in bringing a membrane structure to a successful completion. The paper concludes with a few examples of just what can be achieved when all the final stages of fabrication are carefully followed.

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6th Steelie Awards winners announcedSteel Construction4/2015250News

Kurzfassung

Keine Kurzfassung verfügbar.

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Mollaert, Marijke; De Laet, Lars; Pyl, Lincy; Devos, RikaThe design of tensile surface structures - From a hand calculation in 1958 to a contemporary numerical simulationSteel Construction4/2015251-258Articles

Kurzfassung

This paper summarizes the differences in the design approaches for tensile surface structures between the earliest structures in the 1950s and today’s practice. Current software tools allow more refined and advanced calculations. Nevertheless, a basic hand calculation can clarify the process in a few pages and provide the appropriate key data. A transparent setup allows the form-finding and structural analysis to be redone. The calculation of the cable net for the bandstand by André Paduart (1958) is analysed in this paper as a case study. Both the hand calculation (19 pages) and the numerical simulation are summarized and the design context of the initial and current calculations are described. The approximations made by Paduart resulted in a remarkably intelligible and coherent evaluation of the cable net structure. The historical approach can still be applied for a first verification of a pretensioned cable net or for a membrane structure as the simplified calculation method is similar.

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Beccarelli, Paolo; Maffei, Roberto; Galliot, Cédric; Luchsinger, Rolf H.A new generation of temporary pavilions based on Tensairity girdersSteel Construction4/2015259-264Articles

Kurzfassung

This paper provides a detailed overview of the design and construction of a series of temporary pavilions based on the Tensairity® principle. The pavilions are currently used in the Superbike racing category (Ducati Superbike Team), for the Audi tron Sailing Series, the ISAF Sailing World Cup and for other temporary events (3KIT pavilion). The paper describes the Tensairity® principle, the architectural and structural design of the pavilions, the manufacturing of the components and the assembly of the Tensairity® roofs.

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Announcement: Steel Construction 4/2015Steel Construction4/2015264Announcement

Kurzfassung

Keine Kurzfassung verfügbar.

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ECCS News: Steel Construction 4/2015Steel Construction4/2015265-275ECCS News

Kurzfassung

Events
Technical Committees (TC) activities
TC News
Further ECCS news

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Rubin, HelmutJubilee prize competitionSteel Construction4/2015276Jubilee prize competition

Kurzfassung

Keine Kurzfassung verfügbar.

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Content: Steel Construction 3/2015Steel Construction3/2015Content

Kurzfassung

Keine Kurzfassung verfügbar.

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Heinisuo, Markku; Mäkinen, JariNordic Steel Construction Conference 2015Steel Construction3/2015145Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Janarthanan, Balasubramaniam; Mahendran, Mahen; Gunalan, ShanmuganathanBearing capacity of cold-formed unlipped channels with restrained flanges under EOF and IOF load casesSteel Construction3/2015146-154Articles

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 3/2015Steel Construction3/2015154News

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, JeppeJoint and column behaviour of slotted cold-formed steel studsSteel Construction3/2015155-161Articles

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 3/2015Steel Construction3/2015161Completed 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 SilvaSteel Construction3/2015161People

Kurzfassung

Keine Kurzfassung verfügbar.

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Aarønæs, Anton; Nilsson, Hanna; Neumann, NicolasDynamic response of steel pipe rack structures subjected to explosion loadsSteel Construction3/2015162-166Articles

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, ChristophAnalyses of the loadbearing behaviour of deep-embedded concrete dowels, CoSFBSteel Construction3/2015167-173Articles

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, TimoFretting fatigue phenomenon in bolted high-strength steel plate connectionsSteel Construction3/2015174-178Articles

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 3/2015Steel Construction3/2015178News

Kurzfassung

Offshore Structures Course
EcoSteelPanel

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Schillo, Nicole; Feldmann, MarkusLocal buckling behaviour of welded box sections made of high-strength steel - Comparing experiments with EC3 and general methodSteel Construction3/2015179-186Articles

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-CharentesSteel Construction3/2015186News

Kurzfassung

Keine Kurzfassung verfügbar.

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Steige, Yvonne; Weynand, KlausDesign resistance of end plate splices with hollow sectionsSteel Construction3/2015187-193Articles

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, AndreaSteel solutions for enabling zero-energy buildingsSteel Construction3/2015194-200Articles

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, DominikFatigue strength of marked steel components - Influence of durable marking methods on the fatigue strength of steel componentsSteel Construction3/2015201-209Articles

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; Cywinski, ZbigniewThe new steel-glass architecture of passenger service centres on expressways in JapanSteel Construction3/2015210-215Report

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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