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Autor(en) Titel Zeitschrift Ausgabe Seite Rubrik
Saal, Helmut; Gitter, Reinhold Vergleich der Tragfähigkeiten und Qualitätsanforderungen vorwiegend ruhend beanspruchter Schweißverbindungen bei Aluminiumtragwerken nach DIN EN 1999-1-1 und DIN 4113 Stahlbau 3/2016 207-216 Fachthemen

Kurzfassung

Es werden Grundwerkstoff-Schweißzusatzkombinationen verglichen, die in beiden Normen geregelt sind. Als Verbindungen werden Stumpfnähte und einseitige, gleichschenklige, rechtwinklige Kehlnähte behandelt. Der Vergleich konzentriert sich auf die Ausführungsklasse EXC2. Er ergibt, dass die Qualitätsanforderungen in DIN 4113 größer sind als die in DIN EN 1090-3, wobei jedoch die Unterschiede hinsichtlich der statischen Tragfähigkeit der Schweißnähte unwesentlich sind. Der Vergleich der rechnerischen Tragfähigkeiten zeigt, dass sich bei Stumpfnähten mit Nachweis der Nahtgüte bei gleicher Qualitätsanforderung bemerkenswerte Gewinne gegenüber DIN 4113 ergeben. Die Gegenüberstellung mit den rechnerischen Tragfähigkeiten nach DIN 4113 von Stumpf- sowie Kehlnähten ohne Nachweis der Nahtgüte ergibt, dass in der Ausführungsklasse EXC2 bei Stumpfnähten - wie auch bei den Kehlnähten - bei der Ausnutzungsklasse UR2 auf eine zerstörungsfreie Prüfung verzichtet werden kann.

Comparison of the load-bearing capacities of and quality requirements for predominantly statically loaded welded connections of aluminium structures according to DIN EN 1999-1-1 and DIN 4113.
The comparison is done for combinations of alloy and filler, which are regulated in both standards. It is performed for butt welds and singular rectangular fillet welds with equal leg lengths and focuses on execution class EXC2. The comparison reveals that the quality requirements of DIN 4113 are higher than those of DIN EN 1090-3. However, the differences are negligible with regard to the load-bearing capacity of the welds under static loading. The comparison of the design values of the load-bearing capacities shows that for butt welds with verification of weld quality there is a remarkable benefit with regard to DIN 4113 in the case of equal quality requirements. In the case of non verification of the weld quality of butt welds and fillet welds the comparison with the design load-bearing capacities according to DIN 4113 reveals that for butt welds in execution class EXC2 - as well as with the fillet welds - in utilization class UR2 non-destructive testing is dispensable.

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Kurrer, Karl-Eugen Vom Stab- zum ebenen Flächentragwerk im Stahlbau Stahlbau 3/2016 217-228 Berichte

Kurzfassung

Bekanntlich entstammt die Kastenbauweise der Britannia-Brücke dem Schiffbau. Ebenso besitzt die orthotrope Fahrbahnplatte in der Konstruktionssprache des Stahlschiffbaus eine Wurzel: Das Längsspantensystem von Joseph William Isherwood (1870-1937) integrierte das Stahlblech mit den Längsrippen und Queraussteifungen; damit konnte die Längsfestigkeit von Schiffen erheblich gesteigert und das Stahlgewicht von Tankschiffen um 15 % bis 20 % gesenkt werden [2, S. 207]. Das Isherwood-System, das statisch wie eine orthotrope Platte wirkt, setzte sich seit Beginn des zweiten Dezenniums des vorigen Jahrhunderts Schritt für Schritt zuerst im Massenguttransport auf den Großen Seen, dann im Tankschiffbau (Bild 1) und schließlich im gesamten Stahlschiffbau durch.
In der Zwischenkriegszeit stieß der Inhaber des Lehrstuhles für Statik der Schiffe und Schiffselemente der TH Berlin, Georg Schnadel (1891-1980) (Bild 2a), international an die Spitze dieser technikwissenschaftlichen Disziplin vor. Zusammen mit Fritz Horn (1880-1972) (Bild 2b), Hermann Föttinger (1877-1945) (Bild 2c), Hans Reissner (1874-1967) (Bild 2d) und Moritz Weber (1871-1951) (Bild 2e) gehörte Schnadel zum Quintett der TH Berlin, das international in der Schiffbauwissenschaft Maßstäbe setzte und den Kern der Berliner Schule der Schiffbauwissenschaft bildete. So forschte der US-amerikanische Schiffbauingenieur Henry A. Schade (1900-1992) (Bild 2f) bei Professor Schnadel zu Problemen der orthotropen Platte, der mittragenden Breite von Gurten und Plattenbeulung [2, S. 410], die sich in klassischen Arbeiten zur Statik der Schiffe niederschlugen (s. [3] bis [7]). Mit der Herausbildung der Theorie der mittragenden Breite als gemeinsamer Gegenstandbereich von Flugzeugbau, Schiffbau, Stahlbau und Stahlbetonbau ist jene Schnittmenge technikwissenschaftlicher Theoriebildung benannt, die den Übergang vom Stab- zum Flächentragwerk einleitete.

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Die Eisenbibliothek - ein Kurzportrait Stahlbau 3/2016 228 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Rubin, Helmut Lösung und Gewinner der Weihnachtspreisaufgabe 2015 Stahlbau 3/2016 229-234 Berichte

Kurzfassung

Keine Kurzfassung verfügbar.

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Brux, Gunther Neuartiger Brandschutz-Gipsputz im Stahlbau Stahlbau 3/2016 234-235 Berichte

Kurzfassung

Keine Kurzfassung verfügbar.

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Persönliches: Stahlbau 3/2016 Stahlbau 3/2016 236 Persönliches

Kurzfassung

Tobias Melz neuer Leiter des Fraunhofer LBF
Zum Tode von Artur Fischer

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Kurrer, Karl-Eugen Archimedes. Ingenieur, Naturwissenschaftler, Mathematiker. Von I. Schneider Stahlbau 3/2016 236-237 Rezensionen

Kurzfassung

Keine Kurzfassung verfügbar.

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Ausstellung über Ove Arup in London Stahlbau 3/2016 237-238 Aktuell

Kurzfassung

Keine Kurzfassung verfügbar.

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Firmen und Verbände: Stahlbau 3/2016 Stahlbau 3/2016 238-239 Firmen und Verbände

Kurzfassung

Special Feuerverzinkte Fassadenunterkonstruktionen
Arbeitshilfe zur Planung feuerverzinkter Brücken - Die wichtigsten Inhalte im Überblick

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Termine: Stahlbau 3/2016 Stahlbau 3/2016 239-240 Termine

Kurzfassung

Keine Kurzfassung verfügbar.

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Content: Steel Construction 3/2016 Steel Construction 3/2016 Contents

Kurzfassung

Keine Kurzfassung verfügbar.

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Petzek, Edward; Schmitt, Victor; Mete , Elena; Isp oiu, George; urcan, Alexandru Romanian projects and integral bridge solutions based on composite dowels Steel Construction 3/2016 161-169 Articles

Kurzfassung

The design and construction of sustainable and durable bridges with low maintenance costs is one of the tasks of road and railway administrations of the European Countries. The structures must be safe, economical and need less maintenance during their service life. All these needs can be found in integral abutment bridges. This solution, which eliminates the bearings and expansion joints, leads to low construction and maintenance costs. Integral bridges also have good earthquake resistance. Bridges are vital structures in the transport infrastructure; it is a fact that, in the last decades, composite bridges have become a popular solution in many European countries as a cost-effective and aesthetic alternative to concrete bridges. Their competitiveness depends on several aspects, such as site conditions, local costs of materials and personnel and the contractor's experience. The main topics of this paper are: design of integral bridges, innovative composite dowels for shear transmission, construction of bridges in Romania, structural analysis of bridges and monitoring.

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Lange, Jörg Pozorski, Z.: Sandwich panels in civil engineering - Theory, testing and design. Steel Construction 3/2016 169 Book reviews

Kurzfassung

Keine Kurzfassung verfügbar.

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Pak, Daniel; Kopp, Maik; Feldmann, Markus; Seidl, Günter Condition monitoring of VFT-Rail® slab-track railway bridges Steel Construction 3/2016 170-178 Articles

Kurzfassung

In 2010 the VFT-Rail® system was approved in accordance with CEN and railway standards by Germany's Federal Railway Authority (EBA) for operational testing. The approval was accompanied by a monitoring campaign on a VFT-Rail® bridge crossing the River Simmerbach. As a result of the positive experience gained during the operation of this bridge, two additional railway bridges were designed by SSF Ingenieure AG and put into service in 2014 by Deutsche Bahn (DB). To survey those bridges, a monitoring programme has been developed and instigated. The monitoring programme includes investigating the stress distribution between the concrete and specially designed composite dowels, which have a better fatigue resistance compared with conventional headed studs. The forces at several rail support points are also a focus of interest. The German railway operator DB Netz AG requested the survey to prove the applicability of state-of-the-art calculation methods, which were not part of compulsory codes.

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Evaluation of the performance of steel fibre reinforced self-compacting concrete in elevated slab systems; from the material to the structure Steel Construction 3/2016 178 Completed Phd theses

Kurzfassung

Keine Kurzfassung verfügbar.

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Ungermann, Dieter; Holtkamp, Svenja; Rademacher, Dennis Hot-dip galvanized composite dowel strips Steel Construction 3/2016 179-183 Articles

Kurzfassung

This paper presents additional potential for the future economic development of composite dowel strips by using the durable and long-lasting corrosion protection of hot-dip galvanization. Based on the completed FOSTA research project P835 [5] on the use of hot-dip galvanizing for steel and composite bridge construction, the range of applications for hot-dip galvanizing will be transferred to composite dowel strips in composite bridges. Following a brief summary of the most important results of the previous project, where the corrosion protection duration and the influence of hot-dip galvanizing on the fatigue behaviour of steel were examined, the objectives and planned studies of the new research project will be presented. The currently ongoing FOSTA research project P1042 [8] was initiated by RWTH Aachen University and TU Dortmund University. The results should allow the safe use of hot-dip galvanized composite dowel strips in conjunction with cyclic loads.

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Fire resistance of cold-formed steel columns Steel Construction 3/2016 183 Completed Phd theses

Kurzfassung

Keine Kurzfassung verfügbar.

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Steurer, Marlene; Petraschek, Thomas; Fink, Josef Development of an innovative sandwich plate for trough-type railway bridges - Extremely slender deck slab structure in steel-concrete composite design with cellular longitudinal shear connectors Steel Construction 3/2016 184-190 Articles

Kurzfassung

Substitute structures for old railway bridges with open railway tracks, which are constructed in accordance with valid European standards and regulations, require a specific, suitable deck slab design. Therefore, a composite plate with cellular longitudinal shear connectors and a low overall depth of 200 mm has been investigated at the Research Centre of Steel Structures (TU Wien). The research programme comprised experimental studies as well as additional numerical analyses by means of the finite element method concerning the shear force transmission-mechanism of the sandwich design. Laboratory studies included, among other issues, information about the failure mechanism in the core concrete. This article provides a description of the test program and gives a brief summary of selected research results. A short overview on continuing research activities to determine the serviceability, the load-bearing capacity as well as the fatigue strength of the sandwich plate is presented.

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Fire resistance of cold-formed steel columns Steel Construction 3/2016 190 Completed Phd theses

Kurzfassung

Keine Kurzfassung verfügbar.

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Simon, Pavel; Hrdli ka, Libor; Dráb, Ale ; Zv ina, Vojt ch A composite dowel bridge in the Czech Republic - Development, optimization and implementation of a railway bridge Steel Construction 3/2016 191-199 Articles

Kurzfassung

The floods in the Czech Republic in the last few decades have resulted in a significant number of bridges having to be rebuilt. Unfortunately, the work meant long-term traffic closures for railway bridges, coupled with significant costs for renovation and for providing alternative transport services. As a result, the minimum clear headroom above the design flood level required for new bridges and for reconstructing existing bridges has been increased. This initiated a search for new approaches to designing individual parts of bridge crossings, aiming to comply with the stricter conditions. The research aims to decrease costs in comparison with the costs of raising the finished grade level of the railway, especially at places where adjacent sections such as railway stations etc. are connected.

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Berthellemy, Jacques; Schavits, David; Erre, Charlotte Crossing motorways under traffic without intermediate piers Steel Construction 3/2016 200-206 Articles

Kurzfassung

The European research programme SBRI attempted to reveal the costs caused during the service life of a bridge - direct costs for the bridge owner as well as indirect costs for users. The principal results of SBRI should make it possible to take better account of the true costs of a central pier by considering the risks in the construction phase and those that may threaten the highway overpass during its service life.
CEREMA has developed two economic solutions to reach the objective of avoiding the central pier:
1) The solution implemented at Ko Wé Kara in New Caledonia is a steel-concrete composite tied arch bridge with innovative and economic details:
- innovative radial hangers made of welded plates, and
- innovative reinforcement against accidental impact of over-height vehicles.
2) One other possible solution is the composite steel-concrete gantry bridge. The European research programme PRECOBEAM allowed the use of tests and experimental projects to finalize a new system of connection to lower the cost of this type of structure: a strip along which the cutting line of the steel dowels is made in a clothoid shape (CL), which improves the fatigue resistance. CEREMA introduced this innovation in its research programme.
A composite structure can take various forms. It can associate, for instance, the steel web of a beam directly with a concrete flange. It can also constitute a composite deck with a bottom plate stiffened by connecting CL-shape indented strips. An outstanding project of this type in New Caledonia is described in detail. Of course, this type of bridge is an integral bridge and the article includes some recommendations for the design and construction of integral bridges.

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HISTWIN_PLUS Steel Construction 3/2016 206 News

Kurzfassung

Keine Kurzfassung verfügbar.

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Dias, Vincent; Odenbreit, Christoph Investigation of hybrid steel-glass beams with adhesive silicone shear connection Steel Construction 3/2016 207-221 Articles

Kurzfassung

Glass is used in current construction applications mostly as a façade element, its structural role being only rarely exploited, despite its significant resistance to in-plane compression. A steel-glass composite beam was built to investigate a hybrid steel-glass assembly and its loadbearing behaviour. To fulfil this objective, the existing types of steel-glass connection were evaluated, which allowed the possibilities offered by adhesive jointing to be highlighted. The selection of the adhesive, detailed in the present article, constituted a crucial aspect. An excessively soft connection does not transfer the shear loads between the glass and steel adherends, whereas an excessively stiff connection leads to failure of the glass. A two-component structural silicone was chosen and its properties were assessed with the help of an intensive test programme. As a result of this programme, a new quasi-incompressible hyperelastic material law was developed in order to represent the silicone elastomer behaviour. Numerical simulations were conducted in parallel to large-scale four-point bending tests on the adhesively bonded steel-glass composite beams. The aims were, on the one hand, to assess the bending stiffness of the steel-glass composite beam and, on the other, to validate the numerical simulations to conduct parametric studies.

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Steau, Edward; Keerthan, Poologanathan; Mahendran, Mahen Web crippling capacities of rivet fastened rectangular hollow flange channel beams under one flange load cases Steel Construction 3/2016 222-239 Articles

Kurzfassung

A new rivet fastened rectangular hollow flange channel beam (RHFCB) was proposed using an intermittently rivet fastening process as an alternative to welded beams. The rivet fastened RHFCB allows greater section optimisation and flexibility in designing suitable combinations of web and flange widths and thicknesses for many industrial applications. In the industrial applications of rivet fastened RHFCBs as flooring, roofing or modular building systems, their flanges will be fastened to supports, which will provide increased capacities. However no research has been conducted to investigate the web crippling capacities of RHFCBs with flanges unfastened and fastened to supports under one-flange load cases. Similarly the applicability of current design rules for cold-formed steel sections are not suitable for rivet fastened RHFCBs. Hence to address these issues, an experimental study was conducted to investigate the web crippling behaviour and capacities of RHFCBs based on the new AISI S909 standard test method. This study included rivet fastened RHFCBs with flanges unfastened and fastened to supports under End One Flange (EOF) and Interior One Flange (IOF) load cases. Tests with flanges fastened to supports showed that web crippling capacities increased by 39 and 5 % for EOF and IOF load cases. Comparisons of experimental web crippling capacity results with predictions using the current AS/NZS 4600 and AISI S100 design standards showed that web crippling design equations are conservative for rivet fastened RHFCBs with flanges unfastened and fastened to supports under EOF and IOF load cases. Hence new equations are proposed to determine the web crippling capacities of rivet fastened RHFCBs. This paper presents the details of this web crippling experimental study of rivet fastened RHFCB sections and the results.

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Mirambell, Enrique; Bordallo, Jordi; Real, Esther Torsion and its interaction with other internal forces in EN 1993-1-1 - a new approach Steel Construction 3/2016 240-248 Articles

Kurzfassung

This paper presents and clarifies the treatments included in EN 1993-1-1 [1] relating to checking the resistance of steel cross-sections under torsion and its interaction with other internal forces. Specifically, the origin of the formulations for shear-torsion interaction, which has not been found in the literature, is presented. Furthermore, a very simple formulation based on the expressions used for shear-torsion interaction is developed in order to take into account bending-warping torsion interaction for symmetrical I-sections (IP and HE steel profiles). Such a formulation overcomes the overly conservative approach given in EN 1993-1-1 [1] for class 1 and class 2 cross-sections (plastic and compact cross-sections). Finally, a rigorous method for determining the bending resistance of cross-sections is proposed considering the interaction with shear and torsion. The proposal is well suited to the concept of cross-section class and is perfectly consistent with the approaches set out to consider bending-shear and bending-warping torsion interactions.

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