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Ball, PeterEinwirkungskombinationen für Flachbodentanks nach Eurocode - Beispiele (Teil 2)Stahlbau4/2015285-290Fachthemen

Kurzfassung

Für den der Nachweis Standsicherheit von Flachbodentanks müssen Statiker und Hersteller insbesondere kombinierte Lasteinwirkungen zuverlässig ermitteln. Dazu zählen unter anderem Wind- oder Schneelasten genauso wie Verkehrslasten auf den Dächern oder Drücke und Sogwirkungen. Das Tragverhalten von Flachbodentanks ist aufgrund ihrer Konstruktion komplex. Die verschiedenen Einwirkungen werden zunächst individuell und dann in Kombination bestimmt, um wiederum ihre Auswirkungen auf das Bauwerk zu ermitteln. Die Herausforderung: Bautechnische Standsicherheitsnachweise sind mit Einführung des Eurocodes teilweise aufwändiger. Außerdem weichen dessen Regeln, um die Kombination von Lasten zu bestimmen, von jenen der DIN 18800 ab. Während der erste Teil dieses Beitrags [1] eine einheitliche Anwendung und ein praxisgerechtes, allgemein abgestimmtes Vorgehen diskutiert hat, stehen im zweiten Teil die Beispiele im Vordergrund.

Load combinations for flat-bottom storage tanks according to Eurocodes - Examples (part 2).
Structural engineers and manufacturers must produce reliable calculations, particularly of load combinations, to establish the structural integrity of flat-bottom storage tanks. Load types include for example wind or snow and live loads on tank roofs as well as pressure and suction. Given by the design and construction of flat-bottom tanks, their load-bearing characteristics are complex. The various load types must be determined, first individually and then in combination, before their impact on the structure can be calculated. The challenging nature of the task is exacerbated by the increased complexity of structural stability analyses that has accompanied the introduction of the Eurocode. In addition, the rules specified in the Code for the calculation of load combinations deviate from those in the DIN 18800 standard. The first part of the article [1] examined possibilities for uniform application and a practical procedure in line with general consensus, while the second section focuses on examples.

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Aus der Forschung: Stahlbau 4/2015Stahlbau4/2015290-293Aus der Forschung

Kurzfassung

Stahlleichtverbund-Bauweise - Entwicklung, Optimierung und wirtschaftlicher Einsatz im Bauwesen (P 757)
Effiziente Verbundflachdeckenträgersysteme im Hochbau - Ganzheitliche Optimierung für Montage und Nutzung (P 771)
Untersuchungen zur Herstellbarkeit von frei geformten Hüll- und Fassadenelementen als selbsttragende Struktur ohne Unterkonstruktion aus nichtrostendem Stahl mittels inkrementeller Blechumformung (P 846)
Symphonie im Stahl Stabile Stähle durch Duett atomarer und magnetischer Resonanzen

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Wagenknecht, GerdKranbahnen. Bemessung und konstruktive Gestaltung nach Eurocode. Von Ch. SeeßelbergStahlbau4/2015293Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Schmidt, HartwigVon vorzüglicher Monumentalität. Georg Ludwig Friedrich Laves. Von Lavesstiftung (Hrsg.)Stahlbau4/2015293-295Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Greiner-Mai, DorisKlaus-Jürgen Schneider verstorbenStahlbau4/2015295Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Staeck, KlausAkademie der Künste trauert um Frei OttoStahlbau4/2015295-296Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Fritz Leonhardt Preis 2015 an Werner SobekStahlbau4/2015296Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Aktuell: Stahlbau 4/2015Stahlbau4/2015296-298Aktuell

Kurzfassung

Deutscher Brückenbaupreis 2016 ausgelobt
DVS/DIN-Workshop zur DIN EN ISO 9606-1
Hochbaukultur in Berlin - Tragwerke
Einsatz von libanesischen Ingenieuren in Baden-Württemberg

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Termine: Stahlbau 4/2015Stahlbau4/2015298Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

Keine Kurzfassung verfügbar.

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Stranghöner, NatalieTensile membrane structuresSteel Construction4/2015221Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

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

Kurzfassung

Keine Kurzfassung verfügbar.

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

Kurzfassung

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

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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Contents: Structural Concrete 4/2015Structural Concrete4/2015Contents

Kurzfassung

Keine Kurzfassung verfügbar.

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Vyncke, JohanWorking together, we can reach further...Structural Concrete4/2015447-448Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Flindt Jørgensen, KåreBella Sky Hotel - exploring the potential in precast concrete designStructural Concrete4/2015449-457Technical Papers

Kurzfassung

The Bella Sky Hotel comprises two towers both leaning at an angle of 15 degrees. This inclination introduces enormous forces throughout the building which posed huge challenges for the design. Moreover, the building is made of precast concrete elements, which led to further major design hurdles. A full 3D linear elastic FE (finite element) model modified to approximate non-linear support conditions was used for the design of the hotel. Detailed design was carried out using specific post-design programs. These programs were developed for handling the design of lintels, in-plane forces, stability, horizontal joints, vertical joints and joint reinforcement. The large forces in the building require a substantial amount of reinforcement and thus several complex geometric design solutions. For Rambøll the design has been the start of a new era for building design employing in situ and precast concrete.

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