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Author(s)TitleJournalIssuePageCategory
Floating wind farms near Norway, Portugal and JapanSteel Construction1/201678News

Abstract

No short description available.

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Content: Steel Construction 4/2015Steel Construction4/2015Content

Abstract

No short description available.

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Stranghöner, NatalieTensile membrane structuresSteel Construction4/2015221Editorial

Abstract

No short description available.

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Uhlemann, Jörg; Stranghöner, Natalie; Saxe, KlausComparison of stiffness properties of common coated fabricsSteel Construction4/2015222-229Articles

Abstract

Woven coated fabrics commonly used for tensile membrane structures are PVC-coated polyester fabrics and PTFE-coated glass-fibre fabrics. Regarding the stiffness of these materials, membrane structure experts frequently point out that glass/PTFE fabrics are “stiffer” than PES/PVC fabrics. However, this statement cannot be verified by existing literature, although numerous publications deal with the stress-strain behaviour of coated woven fabrics. Available stress-strain test data are almost impossible to compare, mainly because published stress-strain data for glass/PTFE refer to materials with higher strengths than the published test data for PES/PVC materials. The aim of the present paper is to compare the stiffness properties of PES/PVC and glass/PTFE fabrics with identical tensile strength properties by means of theoretical investigations and uniaxial tensile tests. The results demonstrate that glass-fibre fabric indeed exhibits a higher tensile stiffness than comparable polyester fabric for typical working stress ranges between the prestress level and the maximum design strength. However, for lower stress ranges up to approximately three-quarters of the design strength, the tensile stiffness of glass-fibre fabrics is identical with or even lower than that of comparable polyester fabric. The transverse strain is considerably higher for the glass-fibre fabric throughout.

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The European Prize for Architecture 2015: Laureate Santiago CalatravaSteel Construction4/2015229People

Abstract

No short description available.

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Stimpfle, BerndThe Nuvola for the Nuovo Centro Congressi in RomeSteel Construction4/2015230-236Articles

Abstract

In the EUR district, in the city of Rome, a complex membrane project is built, different from known tensile projects. In more than 10 years the idea of a light floating cloud inside the glazed congress centre has been developed, and is now going to be realized. This article describes the design process of shape and detail, different trial assemblies and it shows the final layout and the details.

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

Abstract

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

Abstract

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

Abstract

No short description available.

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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

Abstract

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

Abstract

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

Abstract

No short description available.

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

Abstract

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

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Rubin, HelmutJubilee prize competitionSteel Construction4/2015276Jubilee prize competition

Abstract

No short description available.

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

Abstract

No short description available.

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

Abstract

No short description available.

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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

Abstract

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

Abstract

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

Abstract

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

Abstract

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

Abstract

No short description available.

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

Abstract

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

Abstract

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

Abstract

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

Abstract

Offshore Structures Course
EcoSteelPanel

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