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Zur Tragfähigkeit von Sandwichelementen unter lokaler Beanspruchung. Von Dr.-Ing. Sebastian Lübke, Technische Universität Dortmund, Lehrstuhl Stahlbau Stahlbau 4/2014 256 Dissertationen

Kurzfassung

Keine Kurzfassung verfügbar.

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Knobloch, Markus Stability of steel structures in fire - State-of-the-art, recent studies in Switzerland and future trends Stahlbau 4/2014 257-264 Fachthemen

Kurzfassung

The stability behaviour of steel structures in fire is strongly affected by the decreasing stiffness during heating, the nonlinear elevated temperature stress-strain response and thermal creep effects. The paper gives an overview of studies on the fire behaviour of steel structures. A major focus of the paper is to summarize recent studies on the material, cross-sectional, member and global structure level performed in Switzerland in recent years. The results of the studies indicate that the use of force-based analytical models using uniform temperature-dependent effective yield strengths, as used for ambient temperature designs, are less suitable for fire design and distinct nonlinear material behaviour then deformation-based models which have been proposed for different stability phenomena. These models seem to accurately predict the fire behaviour of steel structures on all structural levels.

Stabilitätsverhalten von Stahltragwerken im Brandfall - Stand der Forschung, aktuelle Studien in der Schweiz und zukünftige Entwicklungen.
Das Stabilitätsverhalten von Stahltragwerken im Brandfall wird entscheidend von der abnehmenden Steifigkeit während der Erwärmung, dem nichtlinearen Spannungs-Dehnungsverhalten von Baustahl bei erhöhten Temperaturen sowie den Hochtemperaturkriecheffekten beeinflusst. Die Veröffentlichung gibt einen Überblick über Untersuchungen zum Brandverhalten von Stahlkonstruktionen und fasst dabei insbesondere die Ergebnisse neuerer in der Schweiz durchgeführter Studien auf Material-, Querschnitts-, Bauteil- und Tragwerksebene zusammen. Die Ergebnisse zeigen, dass verformungsgrößenorientierte analytische Modelle das Brandverhalten von Stahlkonstruktionen zutreffend beschreiben können und für ausgeprägt nichtlineares Materialverhalten besser geeignet sind als konventionelle schnittgrößenorientierte Tragmodelle.

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Deutscher Brückenbaupreis 2014 verliehen Stahlbau 4/2014 264 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Renner, Anja; Lange, Jörg Versuche zur Zug-Abscher-Interaktionstragwirkung von Schrauben Stahlbau 4/2014 265-272 Fachthemen

Kurzfassung

Seit Mitte des vergangenen Jahrhunderts sind Schrauben im Stahlbau als Verbindungsmittel etabliert. Für viele Anwender kam daher die Änderung der Interaktionsformel zur Bemessung von Schrauben unter kombinierter Zug-Abscher-Beanspruchung im neu eingeführten Eurocode 3 (DIN EN 1993-1-8) gegenüber der altbekannten DIN 18800-Formel sehr überraschend. Die bisher vertraute quadratische Interaktion wird im Eurocode durch eine deutlich konservativere, bi-lineare Funktion ersetzt. Auf der Suche nach einer Antwort auf die Frage, welche Funktion zur Beschreibung des Tragverhaltens von Schrauben unter kombinierter Belastung richtig ist, wurde am Fachgebiet Stahlbau der TU Darmstadt eine Reihe von Versuchen durchgeführt.

Experimental study on the combined tension and shear load bearing behavior of bolts.
Since the middle of last century bolts are an established part of connections in steel structures. Therefore for many design engineers the change in the design rule for bolts under combined tension and shear load in the newly introduced Eurocode 3 (EN 1993-1-8) towards the well-known DIN 18800 design rule came rather as a surprise. The hitherto quadratic interaction function is replaced by a by far more conservative, bi-linear function. Searching for the answer to the question, which function really describes the behavior of bolts under combined load, a number of tests were conducted at the Department of Steel Structures at the TU Darmstadt.

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Lochte-Holtgreven, Stephan; Bechtel, Anne Grout-Verbindungen in Monopile-Tragstrukturen von Offshore-Windenergieanlagen - Erkenntnisse und Entwicklungen Stahlbau 4/2014 273-277 Fachthemen

Kurzfassung

Grout-Verbindungen in Monopile-Tragstrukturen von Offshore-Windenergieanlagen sind hohen zyklischen Belastungen ausgesetzt. Basierend auf theoretischen und experimentellen Untersuchungen werden in diesem Beitrag Einflussfaktoren auf die Bemessung von Grout-Verbindungen diskutiert. Die Diskussion der Einflussfaktoren erfolgt vor dem Hintergrund der im Jahr 2009 festgestellten vertikalen Setzungen an Grout-Verbindungen ohne Schubrippen.

Grouted joints in monopiles for offshore wind energy turbines.
Grouted joints in monopile substructures are exposed to high cyclic loads. Based on theoretical and experimental investigations, this paper presents discovered reasons and discusses the design driving parameters for these grouted joints in the context of vertical settlements in grouted joints without shear keys which have become public knowledge in 2009.

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Zhou, Donghua; Pahn, Matthias; Kurz, Wolfgang Beitrag zur Berechnung von Verbundträgern mit elastischem Verbund - Genaue Methode und ein Näherungsverfahren Stahlbau 4/2014 278-288 Fachthemen

Kurzfassung

In diesem Beitrag werden Verfahren zur Berechnungen von Trägern mit starrem oder elastischem Verbund sowie ohne Verbundwirkung behandelt. Die Anwendung von geschlossenen Lösungen für die exakte Berechnung des elastischen Verbundes ist unentbehrlich. Einige geschlossene Lösungen zur Bestimmung der Normalkraft und der Durchbiegung werden angegeben. Anwendungsmöglichkeiten des hier eingeführten Verbundfaktors und die dahinter stehenden Federmodelle werden gezeigt. Schließlich wird eine Näherungsmethode in Verwendung eines erweiterten Federmodells und eines Verbundfaktors entwickelt. Die Ergebnisse, die nach beiden Rechenmethoden in Beispielen berechnet wurden, zeigen eine gute Übereinstimmung.

Contribution to the calculation of composite beams with elastic composite action.
Methods of Calculations according to the exact equations for rigid and elastic composite action as well as without composite action are discussed. The application of closed solutions is essential for the calculation of the elastic composite action. Some closed solutions for the normal force and the deflection are given. Applications of the introduced composite factor and the spring models behind it are shown. Finally, an approximation method is developed from an extended spring model and the composite factor. The results of model calculations, which were carried out by both methods, show a good agreement.

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Aktuell: Stahlbau 4/2014 Stahlbau 4/2014 289-291 Aktuell

Kurzfassung

Bismarckbrücke in Friedrichsthal: wartungsarme Bahnüberführung durch leichte, verschraubte Aluminium-Konstruktion
Bauen mit Luft Zukunftsweisende Konstruktionen im Luftmuseum Amberg

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Ummenhofer, Thomas Ram Puthli 70 Jahre Stahlbau 4/2014 291-292 Persönliches

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Keine Kurzfassung verfügbar.

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Mensinger, Martin Peter Schaumann 60 Jahre Stahlbau 4/2014 292-293 Persönliches

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Keine Kurzfassung verfügbar.

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Eisele, Steffen; Drexler, Frank-Ulrich; Krämer, Stephan Bernd-Friedrich Bornscheuer 60 Jahre Stahlbau 4/2014 293 Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Termine: Stahlbau 4/2014 Stahlbau 4/2014 294 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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Content: Steel Construction 4/2014 Steel Construction 4/2014 Content

Kurzfassung

Keine Kurzfassung verfügbar.

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ermelj, Bla ; Beg, Darko Cyclic behaviour of welded stiffened beam-to-column joints - experimental tests Steel Construction 4/2014 221-229 Articles

Kurzfassung

Sixteen cyclic tests on full-strength welded stiffened beam-to-column joints were carried out to study their seismic performance. High-strength steel (HSS) was used for composite columns acting as non-dissipative elastic members and mild carbon steel (MCS) for the beams acting as dissipative members. Two types of welded full-strength connections were studied: rib-stiffened and cover-plate connections. Additional parameters in the study were: different cyclic loadings and the presence of axial force in the column. Experimental results revealed the good behaviour of the joints in terms of relocation of inelastic action away from the face of the beam-to-column connection into the beam section, with correspondingly large ductility, low-cycle fatigue resistance and minimization of damage in the column.

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Höglund, Torsten A unified method for the design of steel beam-columns Steel Construction 4/2014 230-245 Articles

Kurzfassung

In Eurocode 3, Part 1-1 [1] two methods are given for the design of beam-columns. They have been criticized for their complexity. Furthermore, internal plastic redistribution of stresses of class 3 cross-sections is not utilized in the code. These shortcomings were resolved in proposal for amended rules in [5], however, the procedures for beam-columns are still complicated and difficult to understand.
An approximate method for the design of beam-columns was proposed 1968 in [6] which was addressed in the Commentary to the Swedish regulations for steel structures [10] and used in Sweden since then [11]. It was accepted also in Eurocode 9 for aluminium [4], where it is especially convenient to allow for softening of the material at local transverse welds, see [9]. The method is here proposed to be included also in Eurocode 3.
In this paper the resistance of class 3 cross-sections is discussed and the unified method for beam-columns is presented. Four worked examples are presented, three of them on rather complicated structures, to show the capability to treat such structures as well.

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Call for Contributions Steel Construction 4/2014 245 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Kido, Ewa Maria; Cywi ski, Zbigniew The new steel-glass architecture of air terminals in Japan Steel Construction 4/2014 246-251 Report

Kurzfassung

Steel-and-glass structures for buildings, railway stations and airports are currently representatives of modern infrastructure worldwide. The first two, characteristic of Japan, have been discussed in previous articles [1], [2]. In this paper the authors look at Japanese air terminals.

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XIII International Conference on Metal Structures Steel Construction 4/2014 251 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Helbig, Thorsten; Giampellegrini, Laurent; Oppe, Matthias "Carioca Wave" - A free-form steel-and-glass canopy in Rio de Janeiro, Brazil Steel Construction 4/2014 252-257 Reports

Kurzfassung

The elegant free-form steel-and-glass canopy covers the atrium of the redevelopment of the “CasaShopping” luxury home furnishings centre in Rio de Janeiro, Brazil. The eye-catching sculptural shape of the canopy is inspired by the ocean waves of the nearby seaside of Barra di Tijuca. The “Carioca Wave” rises out of a pool at ground level and arches over the atrium to provide a link between the shops and the main entrance at the lower level. The complex geometry of the structure places high demands on construction. The high-precision node-beam system was prefabricated in Europe in order to allow fast and simple assembly and erection on site. The free-form steel-and-glass structure - one of the first of its kind in South America - was developed in a collaborative design-and-build project between architect Nir Sivan (Rome, Italy), special contractor se-austria (Schoerfling, Austria) and Knippers Helbig advanced engineering (Stuttgart, Germany).

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Plieninger, Sven; Gebreiter, Daniel; Mühlberger, Jörg; Justiz, Stefan The grid-shell of Jinji Lake Mall - Rise like a Phoenix Steel Construction 4/2014 258-261 Reports

Kurzfassung

Jinji Lake Mall, a 290,000 m² shopping and entertainment centre, will be centrepiece to a development of several super-high-rise buildings by the waterfront of Jinji Lake in Suzhou, China. Visible from the surrounding skyscrapers, the appearance of the “fifth façade” became of paramount importance. In response, the architectural design foresaw a continuous, 35,000 m² free-form glass roof to cover the four individual buildings of the mall ensemble.
schlaich bergermann and partner consulting engineers were tasked with the structural design of the roof whose shape was inspired by the wings of a phoenix. To alleviate excessive in-plane stresses in the roof, a rigid triangulated grid was discarded in favour of a more elastic quadrangular frame system, requiring the generation of a quad-dominant topology on the free-form surface. The complex interplay between base buildings and roof structure required that all analysis be done on a combined model including roof, tree columns and sub-structure.
Multi-resolution mesh modelling stood at the core of a generative work-flow which mathematically optimized for geometric and structural criteria in the same process. Furthermore, geometrically similar facets were grouped and subsequently assigned the same panel, reducing the unique panel count.

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Imbrenda, Andrea The MAST (Manufacture Arts Experimentation Technology) multipurpose building - steel structures for urban transformation Steel Construction 4/2014 262-266 Reports

Kurzfassung

The linear architecture of the MAST (Manufacture Arts Experimentation Technology) multipurpose building in Bologna hides a complex combination of functions and spaces surrounding the core of the building and forms its raison d’être: the sublimation of innovation in manufacturing industry within the retrospective heritage of art and its projection in human memory. In this way, factors normally regarded as secondary to industrial activity become a central part of it and are acknowledged as its true roots and instinctive vision. The building acts as the vehicle for a declaration that there are no innovative ideas other than those arising from the interaction between memory and the capacity to project. The functional distribution traces a passage from emotive education (nursery) through formal teaching (classrooms) and the conservation of memory (museum and exhibition area) to listening (auditorium). Each function is acknowledged, not as a self-contained unit, but rather as a component part of the driving force of innovation, which propels a capacity for technological process that is anything but sterile. In such a setting, the steel structures are the very symbol of the transition from tradition to innovation [1].

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Walter, Peter; Kern, Andreas Material modelling as a tool for the quality assurance and product development of heavy plate steels for steel construction Steel Construction 4/2014 267-273 Reports

Kurzfassung

Shorter product development cycles and compliance with exact process parameters during the production of high-strength heavy plate for heavy machine construction requires fast modelling of mechanical and technological material properties during the actual production process. To this end, the Heavy Plate Unit at ThyssenKrupp Steel Europe AG has used state-of-the-art calculation tools from collections of process data and test value databases. This report describes the step-by-step development of the underlying material models, their implementation in practical computer software and their practical application illustrated by some selected examples.

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"Sustainable Steel - Policy and Indicators 2014" published Steel Construction 4/2014 273 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Berrais, Abbes; Pollitt, Kieran An excel based design tool for end plate connections to Eurocode 3 Steel Construction 4/2014 274-279 Reports

Kurzfassung

The design of moment-resisting joints can often be a laborious task if performed by manual calculation. This leads to potential rising of unnecessary labour costs when industry approved design tool would otherwise suffice. Steel connection designers are charged with specifying joint components such as plates, welds and bolts required that have structural capacity to transmit the loads which the connection is exposed to. This said connection design and its components need to be economical with regards to cost. However, a balance needs to be reached between the over-design of the connection leading to excessive capacities, and the finite element design that provides the connection with just what it needs to resist such loads.
The aim of this paper is the description of an Excel based tool for the detailed design of bolted end plate connections between beams and columns in accordance to Eurocode 3. The design tool is practical, user friendly with minimum manual input and relatively transparent such that it provides the user with an easy step-by-step guide during the design process.

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Bögle, Annette; Kurrer, Karl-Eugen Jörg Schlaich at 80 Steel Construction 4/2014 279-281 Reports

Kurzfassung

The Stuttgart School was the first movement to combine the style of and training in architecture, taught and supported at the Stuttgart College of Technology. The Stuttgart School of Building Design is losing visibility just as the profile of architects in society is rising. However, a thoroughgoing analysis of its particular qualities is overdue, especially in the context of creative construction engineering. For example, Bill Baker (*1953), a Structural and Civil Engineering Partner at Skidmore, Owings & Merrill LLP (SOM), Chicago, USA and winner of the 2009 Fritz Leonhardt prize, has described the creative approach as a key element in (civil engineering) training at the University of Stuttgart. Towards the end of the 20th century, the Stuttgart School of Building Design was greatly influenced by Jörg Schlaich (*17th October 1934), whose working, teaching and research methods also helped inspire the creative approach praised above.

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Corrections and amendments to Kathage et al. Steel Construction 4/2014 281 Corrigendum

Kurzfassung

Keine Kurzfassung verfügbar.

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