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Studie Metals Deals - Forging Ahead 2012: Übernahmen in Stahl- und Metallindustrie haben sich verdoppelt Stahlbau 4/2012 314 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Stranghöner, Natalie; Kühn, Bertram Auswahl der Stahlsorte auf Basis der DIN EN 1993-1-10 Stahlbau 4/2012 315-323 Fachthemen

Kurzfassung

Im Rahmen der Eurocode 3-Familie stellt die DIN EN 1993-1-10 den Teil dar, der für eine ausreichende Stahlsortenauswahl zur Vermeidung von Spröd- und Terrassenbruch anzuwenden ist. Die Regelungen der DIN EN 1993-1-10 sind nahezu identisch mit den bekannten nationalen Regelungen der DASt-Richtlinien 009 und 014, so dass sich für den Anwender nur geringfügige Änderungen ergeben. Die Stahlsortenwahl zur Vermeidung von Sprödbruch basiert auf einem bruchmechanischen Konzept, in dem die Bruchzähigkeit des Materials im eingebauten Zustand über eine Korrelation zu den in den Produktnormen angegebenen Kerbschlagzähigkeitsanforderungen in Verbindung gebracht wird. Die Norm ermöglicht drei Verfahren zur Nachweisführung, wobei im Regelfall der einfache Nachweis der Wahl der Stahlgüte durch den Vergleich der vorhandenen mit der maximal zulässigen Blechdicke mit Hilfe einer in der Norm enthaltenen Tabelle zum Tragen kommt. Der Nachweis einer ausreichenden Bruchzähigkeit in Dickenrichtung zur Vermeidung von Terrassenbruch kann prinzipiell über zwei Wege erfolgen: den traditionellen Weg nach DASt-Richtlinie 014 mit einer Bestimmung der erforderlichen Z-Güte vor Bestellung des Materials oder der Möglichkeit der zerstörungsfreien Prüfung der gefertigten Stahlbauteile im Hinblick auf Vorliegen von Terrassenbrüchen.

Choice of the steel grade according to DIN EN 1993-1-10.
As part of the Eurocode 3-family, DIN EN 1993-1-10 is responsible for sufficient selection of steel grades to avoid brittle fracture and lamellar tearing. The regulations of DIN EN 1993-1-10 are almost identical to the well known rules of the national DASt guidelines 009 and 014, so that there are only minor changes for the user. The choice of the steel grade to avoid brittle fracture is based on a fracture mechanics approach, in which the fracture toughness of the material considers a correlation to the notched impact strength requirements specified in the product standards. DIN EN 1993-1-10 allows three methods of verification, where normally the simple proof of the choice of permissible plate thickness using a standardized table comes into play. The proof of adequate fracture toughness in the through-thickness direction to avoid lamellar tearing can be done basically in two ways: the traditional way to DASt guideline 014 on the definition of a required Z-grade prior to ordering of the material or the possibility of testing the already fabricated steel components whether lamellar tearing has occurred.

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Kathage, Karsten; Misiek, Thomas Bemessung und Konstruktion von Zuggliedern nach DIN EN 1993-1-11 Stahlbau 4/2012 324-331 Fachthemen

Kurzfassung

Der Beitrag behandelt die Bemessungs- und Konstruktionsregeln des Eurocode 3 Teil 1-11 für Zugglieder aus Stahl. Der Beitrag umfasst Regelungen für Zugstäbe und Zugstabsysteme sowie Regelungen für offene und vollverschlossene Spiralseile, Rundlitzenseile, Paralleldrahtlitzen, Paralleldrahtbündel und Litzenbündelseile einschließlich der zugehörigen Endverankerungen, Klemmen und Umlenksättel. Diese Regelungen werden vorgestellt und erläutert. Soweit hilfreich und möglich erfolgt ein Vergleich mit den Regelungen von DIN 18800-1.

Design of tension components according to DIN EN 1993-1-11.
The paper deals with the design rules of Eurocode 3 part 1-11 for tension components. The paper covers rules for tension rods and tension rod systems as well as rules for wire ropes, bundles of parallel wires or strands including the corresponding end connectors, clamps and saddles. These rules are introduced and explained. If helpful and possible, a comparison with the rules of DIN 18800-1 is made.

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Stroetmann, Richard; Deepe, Peter; Kuhlmann, Ulrike; Rasche, Christina Bemessung von Tragwerken aus höherfesten Stählen bis S700 nach EN 1993-1-12 Stahlbau 4/2012 332-342 Fachthemen

Kurzfassung

Mit der Einführung von Eurocode 3 und EN 1090-2 ist die Bemessung und Ausführung von Stahltragwerken aus höherfesten Stählen in den Festigkeitsklassen über S460 bis S700 durch die Normung in weiten Teilen geregelt. EN 1993-1-12 enthält für diese Stähle zusätzliche Regeln, die bei der Anwendung der verschiedenen Teile des Eurocode 3 zu beachten sind. Unterschiede für höherfeste Stähle ergeben sich u. a. aus dem geringeren plastischen Verformungsvermögen. Die Möglichkeit zum schlankeren Bauen führt zu einer größeren Bedeutung von Stabilitätseinflüssen und Verformungen. Weitere Unterschiede ergeben sich in der Tragfähigkeit und dem Verformungsvermögen von Schrauben- und Schweißverbindungen. Im folgenden Beitrag werden die speziellen Regeln zur Berechnung und Bemessung von Tragwerken aus höherfesten Stählen und deren Verbindungen erläutert sowie Potenziale gegenüber normalfesten Stählen aufgezeigt.

Design rules for structures made of high strength steels up to S700 according to EN 1993-1-12.
Due to the implementation of Eurocode 3 and EN 1090-2 design and execution of steel structures made of high strength steel of grades higher than S460 up to S700 are mostly regulated by standardization. EN 1993-1-12 contains supplementary rules for these steel grades, which have to be considered when applying other parts of Eurocode 3. Differences with regard to high strength steels, for example, result from lower plastic deformability. The possibility to design more slender structures increases the relevance of deformations and stability effects. Further differences are reflected in resistance and deformation capacity of bolted and welded connections. The following article describes special design rules for structures made of high strength steels and their joints and demonstrates their potential compared to conventional steel grades.

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Sczyslo, Frank Erneuerung der Seilbeschichtung an der Severinsbrücke in Köln Stahlbau 4/2012 343-346 Berichte

Kurzfassung

Keine Kurzfassung verfügbar.

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Feldmann, Markus; Stranghöner, Natalie; Ungermann, Dieter; Wellershoff, Frank Gerhard Sedlacek ? Stahlbau 4/2012 347-348 Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Jäppelt, Ulrich Karl Morgen 60 Jahre Stahlbau 4/2012 348-349 Persönliches

Kurzfassung

Keine Kurzfassung verfügbar.

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Münchner Stachusbauwerk erhält Auszeichnung für hervorragenden Brandschutz Stahlbau 4/2012 349-350 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Termine: Stahlbau 4/2012 Stahlbau 4/2012 350-352 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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Loipersberger, Anton Handbuch Technischer Lawinenschutz. Grundlagen, Entwurf und Bemessung, Beispiele. Von Rudolf-Miklau, F., Sauermoser, S. (Hrsg.) Stahlbau 4/2012 350 Rezensionen

Kurzfassung

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Content: Steel Construction 4/2012 Steel Construction 4/2012 Content

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Keine Kurzfassung verfügbar.

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Ungermann, Dieter; Brune, Bettina; Lübke, Sebastian Numerical and analytical investigations on plain channels in coupled instabilities Steel Construction 4/2012 205-211 Articles

Kurzfassung

This paper presents numerical and analytical investigations of thin-walled steel C-section members subjected to both local and global buckling. The results presented here are based on experimental tests which are dealt with in a previous publication [1]. Numerical calculations using the finite element method are performed to recalculate test results from stub column tests with local buckling and long column tests with coupled local and global buckling failure. These results are analysed using different design procedures based on Eurocode 3. Using modified buckling factors and an approach considering effective stiffness by approximation, it is possible to determine the ultimate buckling loads from tests and numerical investigations efficiently.

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Dimakogianni, Danai; Dougka, Georgia; Vayas, Ioannis; Karydakis, Phaedon Innovative seismic-resistant steel frames (FUSEIS 1-2) - experimental analysis Steel Construction 4/2012 212-221 Articles

Kurzfassung

Two innovative systems of seismic-resistant steel frames with dissipative fuses were developed within the European Research Programme “FUSEIS”. The first, named FUSEIS 1, resembles a shear wall, whereas in the second system, named FUSEIS 2, the devices are made by introducing a discontinuity into the composite beams of a moment-resisting frame. The main advantage of “FUSEIS” compared with conventional systems is that inelastic deformations are strictly concentrated and controlled in zones that constitute easily replaceable fuses. The dissipative elements can be positioned in small areas of the building and do not interrupt the architectural plan as braces do. Another advantage of the system is the possibility of easy installation and removal within the structure.
This article presents the results of the experimental and analytical investigations of the innovative energy dissipation system FUSEIS 1. The system consists of two closely spaced strong columns connected by dissipative beams within each storey. In order to enhance the stiffness, strength and energy dissipation capacity of the system, several fuses are provided within each storey. During a strong seismic event, the dissipative zones are formed within the pins while the other parts of the structure remain elastic and protected.

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Biehounek, Josef; Grolik, Helmut; Herz, Susanne Probabilistic safety analysis of loadbearing bar structures according to second-order theory for the combination of time-dependent loads Steel Construction 4/2012 222-231 Report

Kurzfassung

The article describes a method for the probabilistic risk assessment of loadbearing bar structures according to second-order theory without having to indicate expressly the limit state equation. The load combination is also considered in the course of the calculation. Time-dependent loads are modelled as pulse processes with a rectangular form. The sequence of load renewals has a Poisson distribution and the magnitude of the load is subjected to a Pearson distribution. The distribution of the maximum values of the safety-relevant load reaction is obtained by means of the Monte Carlo simulation. The basis is a generalization of the deformation method. The probability of cross-section failure is determined for an exemplary loadbearing structure. The probability is sensitive to the distribution parameters of the processes. For certain loading constellations, this analysis contradicts the safety concept of building practice.

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IABSE - The First 80 Years. From T. F. Peters Steel Construction 4/2012 231 Book review

Kurzfassung

Keine Kurzfassung verfügbar.

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Helbig, Thorsten; Oppe, Matthias Roofs and façades of United States Institute of Peace, Washington D. C. Steel Construction 4/2012 232-237 Reports

Kurzfassung

The Institute of Peace’s new facility, a modern conference and an interactive educational center dedicated to the theme of peacemaking, faces the National Mall in Washington, DC and is within sight of the Lincoln, World War II, Korean, and Vietnam Veterans memorials. The building is organized around two atria, one part facing the Potomac River, the other the Mall and the Lincoln Memorial. The north atrium serves as the centerpiece for the spaces devoted to the organization’s work and research, and the south-facing atrium is focused on public programs and conferences. The roof of the building features a series of undulating, wing-like elements constructed of steel frame and white translucent glass forming an image resembling the wings of a dove. The glass appears opaque and white during the day and glows gently from within at night.
The two roofs and four curtain wall façades have been designed, fabricated and installed by seele, being responsible for the realization. Optimisation of conceptual design, structural and detailed design for the free forms of the self-supporting shell structures and the vertical facades was conducted by Knippers Helbig, Advanced Engineering.

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Espion, Bernard The Vierendeel bridges over the Albert Canal, Belgium - their significance in the story of brittle failures Steel Construction 4/2012 238-243 Reports

Kurzfassung

Between 1933 and 1938, some 50 Vierendeel-type welded road bridges were erected in Belgium to provide crossings over the Albert Canal or the Campine canals. They were the first significant applications of electric arc welding in Belgium and constitute the majority of the large welded bridges built at that time in Belgium. It was the heyday of the Vierendeel bridge, which had been invented in 1895 but which had found only limited applications before 1930, with less than 40 built in Belgium and Congo in 30 years. But this rapid application of welding to structural steelwork encountered many problems that were probably overlooked in the climate of euphoria surrounding bridge-building. In March 1938 the Hasselt Bridge suffered a brittle failure. This is generally regarded as the first brittle failure of a large all-welded structure and received much attention at that time. But in 1940 at least three other bridges of this series were also badly fractured and there are indications that some others also experienced serious cracking problems. This paper places theses accidents in perspective in the long story of brittle failures.

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Zhang, Min; Wan, Tianbao; Wang, Yingliang The Design of Langqi Min River Bridge, Fuzhou, China Steel Construction 4/2012 244-249 Reports

Kurzfassung

One key project in the Chinese city of Fuzhou is Langqi Min River Bridge, which connects the business and technology district with downtown Fuzhou. The main bridge is a twin-pylon cable-stayed structure with a main span of 680 m and a steel box girder. This paper presents the detailed design features of the bridge, including foundations, anti-ship collision devices, pylons, steel box girder and stay cables.

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Laustsen, Bjarke Stability of brackets and stiffeners in steel structures Steel Construction 4/2012 250 Errata

Kurzfassung

Keine Kurzfassung verfügbar.

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Renner, Anja; Lange, Jörg Load-bearing behaviour of high-strength bolts in combined tension and shear. Steel Construction 4/2012 250 Errata

Kurzfassung

Keine Kurzfassung verfügbar.

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Pelke , Eberhard; Kurrer, Karl-Eugen The art of major bridge-building - Hellmut Homberg and his contribution to multiple cable-stayed spans Steel Construction 4/2012 251-265 Reports

Kurzfassung

Based on findings from Büchenauer Bridge (1956), the North Elbe Bridge in Hamburg (1963) and the bridge over the Rhine at Leverkusen (1965), Homberg designed and engineered the Friedrich Ebert Bridge across the River Rhine. This was the first bridge in the world with cables that distribute instead of concentrate the load transfer, and thus define the bridge deck as a continuous, elastically supported element and not as a beam on point supports.
After the building of major bridges declined in Germany, Homberg became active in France, and later rounded off his work with multi-cable-stayed bridges in the UK. That work resulted in the Queen Elizabeth II Bridge (1991), Homberg’s late magnum opus.
This article contains a complete catalogue of Homberg’s multi-cable-stayed bridges and discusses for the first time previously unpublished designs by Homberg. These prove that he had already moved on from the classic cable-stayed bridge to the general multi-span cable-stayed bridge as early as 1963.

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The diamond-shaped roof of the Vienna Central Railway Station* Steel Construction 4/2012 266-267 Reports

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ECCS News: Steel Construction 4/2012 Steel Construction 4/2012 268-272 ECCS News

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Conferences
Announcements
Technical Committees (TC) activities
TC News

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Contents: Structural Concrete 4/2012 Structural Concrete 4/2012 Contents

Kurzfassung

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Clark, Gordon Concrete, Cars, Computers and Climate Change Structural Concrete 4/2012 211-212 Editorial

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Keine Kurzfassung verfügbar.

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