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Autor(en) Titel Zeitschrift Ausgabe Seite Rubrik
Schmitz , Christoph Brücken und Tunnel der Bundesfernstraßen 2011 - Dokumentation. Vom Bundesministerium für Verkehr, Bau und Stadtentwicklung (BMVBS), Ref. StB 17, Brücken, Tunnel und sonstige Ingenieurbauwerke (Redaktion) Stahlbau 2/2012 165-166 Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Voormann, Friedmar Claus Köpcke 1831-1911. Netzwerke. Biographie eines Ingenieurs. Von Elbert, C. Stahlbau 2/2012 166-167 Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Rauert, Tim Zum Einfluss baulicher Randbedingungen auf das dynamische Verhalten von WIB-Eisenbahnbrücken Stahlbau 2/2012 167-168 Dissertationen

Kurzfassung

Keine Kurzfassung verfügbar.

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Salomon, Rainer; Wieland, Hans-Joachim Aus der Forschung: Stahlbau 2/2012 Stahlbau 2/2012 168-170 Aus der Forschung

Kurzfassung

• Walz- und Spaltprofilieren - Abschätzung des Produkt- und Marktpotentials der neuen Zielprodukte (P 638) und Spaltprofilieren dünner Bleche - Herstellung und Weiterverarbeitung (P721)
• Erweiterung der Einsatzgrenzen von hochfesten Schrauben ohne Vergütungsbehandlung (P 728)
• Optimierung von Verzug und Eigenspannungen beim Schweißen dickwandiger Bauteile (P 784)

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Firmen und Verbände: Stahlbau 2/2012 Stahlbau 2/2012 170-171 Firmen und Verbände

Kurzfassung

• Dr.-Ing. Heinrich Schroeter wiedergewählt
• GSI mbH beruft neue SLV-Leiter
• Zusammenschluss bauforumstahl und Deutscher Stahlbau-Verband DSTV
• Neues Mitglied bei bauforumstahl: Industrieverband Feuerverzinken

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Aktuell: Stahlbau 2/2012 Stahlbau 2/2012 171-173 Aktuell

Kurzfassung

• DBV gibt Brückenstudie heraus
• Schweizer Stahlbaupreis Prix Acier 2011 verliehen

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Termine: Stahlbau 2/2012 Stahlbau 2/2012 173-174 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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Content: Steel Construction 2/2012 Steel Construction 2/2012 Content

Kurzfassung

Keine Kurzfassung verfügbar.

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Wieschollek, Matthias; Schillo, Nicole; Feldmann, Markus; Sedlacek, Gerhard Lateral-torsional buckling checks of steel frames using second-order analysis Steel Construction 2/2012 71-86 Articles

Kurzfassung

This article summarizes the rules given in EN 1993-1-1 [2] for using second-order analysis to check the flexural and lateral-torsional buckling of members and systems loaded in the strong plane of their cross-section which may not fail due to out-of-plane instability.
The rules relevant in EN 1993-1-1 [2] are those for equivalent geometrical imperfections resulting from the elastic buckling modes with amplitudes derived from column buckling tests according to EN 1990 Annex D [1] plus those for the linear superposition of utilization rates in the strong and weak planes as used for evaluating tests to determine the amplitude of imperfections and the partial factors.
Computer assistance is generally required for determining the elastic buckling modes; the computer outputs gives both modal out-of-plane displacements and modal out-of-plane bending moments for the relevant flanges of the sections. The use of out-of- plane bending moments makes the assessment clear and simple. It leads to a magnification factor for the in-plane-utilization rate that allows the design point x = xd to be found along the length of the member or system where the cross-sectional check is relevant. It also shows that the results of the second-order analysis for this design point and the use of buckling curves for member checks at this design point are identical.
The assessment procedure with second-order analysis is generic and applicable to all design cases, whereas the member checks with buckling curves as specified in EN 1993-1-1 [2] are intended to be valid for specific loadings and boundary conditions only (object-oriented rules). They should be consistent with the generic rules. In this respect, this article is a contribution towards the further evolution of EN 1993-1-1 [2].

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Ungermann, Dieter; Brune, Bettina; Lübke, Sebastian Experimental investigations on plain channels in coupled instabilities Steel Construction 2/2012 87-92 Articles

Kurzfassung

This paper presents experimental investigations on thin-walled steel members with C-cross sections subjected to both local and global buckling failure. Different cross sections, buckling length and steel grades have been investigated for welded and cold-formed sections. Experimental tests on stub columns with only local buckling failure and on longer columns with combined local and global buckling will be presented. The stub column tests focused on the local buckling mechanisms with respect to axial compression loading and combined compression and bending. By testing longer columns subjected to both local and global buckling, the interaction of local and global buckling failure will be addressed. Therefore results will be based on general observations from the local buckling stub column tests. The influence of initial global geometric imperfections with respect to size and shape will be identified as crucial for the overall ultimate buckling strength of C-sections subjected to coupled instabilities.

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Maljaars, Johan; van Dooren, Frank; Kolstein, Henk Fatigue assessment for deck plates in orthotropic bridge decks Steel Construction 2/2012 93-100 Articles

Kurzfassung

Since the 1960s, orthotropic deck plates of highway bridges have been built with large cold-formed trapezoidal stiffeners supporting a deck plate with a thickness of approx. 12 mm. The maximum cross-beam spacing is approx. 4 m. A number of these bridge decks in The Netherlands suffer from fatigue cracks in the deck plate. First cracks have been observed after about 30 years in service. In one particular movable bridge, the cracks were found after only seven years. In many other countries, this type of crack has not yet been observed.
This article provides a fatigue assessment procedure for deck plates. The procedure is calibrated with the conditions and observations in The Netherlands. It gives a fatigue life prediction and takes account of inspection results quantitatively. Although aspects such as the type and thickness of the surface finishes and the traffic load may vary between countries, the principles of the assessment procedure in this article are generally applicable and can be used to identify reasons for differences in fatigue life and to develop strategies for increasing the life.

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Heinisuo, Markku; Perttola, Henri; Ronni, Hilkka Component method for end plate joints, modeling of 3D frames: literature review Steel Construction 2/2012 101-107 Reports

Kurzfassung

Literature of modelling steel frames in 3D using beam finite elements is presented. The development of member modelling is described first followed by joint modelling. The review ends with a brief introduction of the 3D component model for end plate joints. The next part includes three examples of the 3D component method: base bolt joint, beam- to-column joint and member splice joint.

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Böttcher, Christian; Frenz, Matthias; Kaufmann, Henning Iconic Campus of the Zayed University Abu Dhabi Steel Construction 2/2012 108-116 Reports

Kurzfassung

The Emirate of Abu Dhabi is planning for the post-oil era, so education plays a central role in its Master Plan 2030. The new building complex of the Zayed University, intended for 6,000 students, is located in the future Capital District directly on the important connecting road between the Abu Dhabi international airport and the old town peninsular.
Hamburg architects BRT’s (Bothe Richter Teherani) symbolism-rich design moulds the 100.000 m2 GFA ensemble of buildings in the central area into a huge sculpture. The linking element is a jointless free-form roof of 8,000 tonnes of steel with aluminium cladding whose shape and lightness echoes the traditional Arabic chador.
A very short time for design and construction required close cooperation within the international team set up by a main contractor. The project required mastering of numerous engineering challenges, different design philosophies, difficult interfaces between design and construction works on a huge construction site with up to 8,000 workers running in parallel to the design works.

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Dietrich, Andreas; Kern, Andreas; Schäf, Christian New constructional steel for pressure vessels with a high resistance to hydrogen-induced cracking (HIC) Steel Construction 2/2012 117-122 Reports

Kurzfassung

Currently, natural gas with 25 % share of fossil fuels is a very important energy resource. Many gas reserves contain natural gas with a proportion of up to 35 % of hydrogen sulphide (H2S), which can cause hydrogen-induced cracking (HIC).
This paper discusses the development, production and properties of a new steel grade X-COR (eXtra CORosionresistant) for welded pressure vessels, which fit the actual requirements according different standards for pressure vessel steels with up to 355 MPa minimum yield strength very well. The outstanding HIC-resistance is achieved in normalized and stress relieved condition up to a plate thickness of 50 mm. Additionally, important aspects regarding processing behaviour and application of X-COR are highlighted.

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Plieninger, Sven; Chen, Wei Shanghai Oriental Sport Center - SOSC Steel Construction 2/2012 123-129 Reports

Kurzfassung

The following paper is based on a lecture, hold by Magdalene Weiss (gmp von Gerkan, Marg und partner) and Sven Plieninger (schlaich bergermann und partner) at Tongji University Shanghai on 30th November 2011.

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ECCS News: Steel Construction 2/2012 Steel Construction 2/2012 130-133 ECCS News

Kurzfassung

• Conferences
• Announcements
• Technical Committees (TC) activities
• TC News
• New Publications
• ECCS Eurocode design manuals

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Bossenmayer, Horst J. Gerhard Sedlacek died Steel Construction 2/2012 134 People

Kurzfassung

Keine Kurzfassung verfügbar.

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Voormann, Friedmar Before steel: the introduction of structural iron and its consequences. From Rinke, M., Schwartz, J. (eds.) Steel Construction 2/2012 134-136 Book review

Kurzfassung

Keine Kurzfassung verfügbar.

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Contents: Structural Concrete 2/2012 Structural Concrete 2/2012 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

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Dancygier, Avraham N. Engineering a concrete future Structural Concrete 2/2012 71-72 Editorial

Kurzfassung

Keine Kurzfassung verfügbar.

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Toniolo, Giandomenico; Colombo, Antonella Precast concrete structures: the lessons learned from the L'Aquila earthquake Structural Concrete 2/2012 73-83 Articles

Kurzfassung

This paper examines the problems of the seismic design of precast concrete structures as indicated by the effects of the L'Aquila earthquake of 2009. The behaviour of such structures on that occasion is analysed on the basis of detailed surveys performed on site on a relevant number of buildings just after the earthquake.
Following this analysis, which points out the inadequacy of the cladding panel connections, the paper presents a systematic definition of the problem, examining the behaviour of the whole system of structure + panels. Proposals are made for the typology of one-storey buildings for industrial uses, some possible alternative solutions that ensure the stability of all the construction elements. Specific calculations for a typical precast building give the order of magnitude of the forces and/or displacements for which the connections are to be designed.

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Aguiar, Eduardo Aurélio Barros; Bellucio, Ellen Kellen; El Debs, Mounir Khalil Behaviour of grouted dowels used in precast concrete connections Structural Concrete 2/2012 84-94 Articles

Kurzfassung

This research deals with the behaviour of grouted dowels used in beam-to-column connections in precast concrete structures. The research focuses primarily on the theoretical and experimental analysis of the resistance mechanism of the dowels. The experimental programme included 15 models for analysing the following variations in dowel parameters: a) dowel diameters of 16, 20 and 25 mm, b) dowel inclinations of 0° (i.e. perpendicular to the interface), 45° and 60°, c) compressive strength of classes C35 and C50 for the concrete adjacent to the dowels, and d) the absence or presence of compressive loads normal to the interface. The experimental results indicate that the ultimate capacity and shear stiffness of the inclined dowels are significantly higher than those of the perpendicular dowels. Based on these results, an analytical model is proposed that considers the influence of the parameters studied regarding the capacity of the dowel.

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Desnerck, Pieter; De Schutter, Geert; Taerwe, Luc Stress-strain behaviour of self-compacting concretes containing limestone fillers Structural Concrete 2/2012 95-101 Articles

Kurzfassung

Knowledge of the stress-strain relationship of concrete under uniaxial compression is crucial for the design of concrete members. This study focuses on the stress-strain behaviour under compression and especially the strain-softening of self-compacting concretes produced with limestone fillers. Four self-compacting concretes (SCC) and three conventional vibrated concretes (VC) were used to produce cylindrical test specimens with an h/d ratio of 3. The &sgr;-&egr; diagram at five different ages (3-91 days) was recorded during uniaxial compressive tests. The peak strain of the SCC cylinders was shown to be higher than the ones recorded for VC concretes. However, the specific toughness of both concrete types turned out to be comparable.

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Alani, Amir M.; Aboutalebi, Morteza Analysis of the subgrade stiffness effect on the behaviour of ground-supported concrete slabs Structural Concrete 2/2012 102-108 Articles

Kurzfassung

This paper confirms that the structural behaviour of ground-supported slabs is a non-linear function of the structural properties of slabs as well as the supporting soil. The findings reported emphasize that the suggested equations used in design codes pay insufficient attention to the effect of the supporting ground stiffness within the context of the mechanical behaviour of slabs as far as ductility is concerned. The results presented demonstrate that ground stiffness has a significant effect on the ductility of ground-supported slabs. It also pays particular attention to the possibility of determining the ductility limit of slabs.

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Stráský, Jirí; Necas, Radim; Kolácek, Jan Dynamic response of concrete footbridges Structural Concrete 2/2012 109-118 Articles

Kurzfassung

Experience with the analysis and performance of 15 lightweight concrete footbridges is presented from the point of view of their dynamic response caused by moving people. The footbridges are formed either by a stress ribbon or by a slender deck supported by arches or suspended from pylons. The dynamic response was determined according to a procedure given in a 1998 draft of Eurocode 2: Design of Concrete Structures - Part 2: Concrete Bridges. Thirteen footbridges have been built and so far no complaints about their dynamic behaviour have been recorded.

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