Die Bemessung von Verbunddübelleisten nach neuer Allgemeiner bauaufsichtlicher Zulassung

Gündel, М.; Kopp, Maik; Feldmann, Markus; Gallwoszus, Joerg; Hegger, Josef; Seidl, Günter

doi:10.1002/stab.201410137

Cited by 39 publications

(27 citation statements)

References 11 publications

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“…Diese können zum Beispiel als tragende Verbundfußböden von integrativen Verbunddeckensystemen (Bild 1a) [5], als Verbunddachkonstruktion (Bild 1b), als dünnwandiges Stahl-Beton-Sandwich-(Bild 1c) [6] oder als Fassadenelement (Bild 1d) zum Einsatz kommen. Zur Umsetzung dieser Verbundquerschnitte sind jedoch kleinskalige Verbundmittel erforderlich, da Kopfbolzendübel [7] oder Verbunddü-belleisten [8] …”

Section: Investigations In the Static Shear Capacity Of Small-scaled unclassified

Untersuchungen zur statischen Schubtragfähigkeit kleinskaliger Pin‐Verbundmittel

et al. 2016

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Die Entwicklung von hochfesten Stählen sowie hoch‐ (HSC) und ultrahochfesten Betonen (UHPC) und ihr günstiges Verhältnis von Festigkeit zu Eigengewicht ermöglicht eine deutliche Reduzierung der Querschnittsabmessungen gegenüber normalfesten Werkstoffen. Hierdurch können im Stahl‐Beton‐Verbundbau schlanke, weitspannende und hochtragfähige Verbundkonstruktionen realisiert werden. Für einige Anwendungsgebiete im Verbundbau können sich hierdurch die theoretisch erforderlichen Bauteildicken der Betondeckschichten auf wenige Zentimeter reduzieren. In solch schlanken Verbundkonstruktionen mit dünnen Betongurten ist der Einsatz von zum Beispiel Kopfbolzendübeln oder Verbunddübelleisten als Verbundmittel zur Übertragung der Schubkräfte nicht mehr möglich. Zur Verbindung der Teilquerschnitte aus Beton und Stahl und zur Sicherstellung der Verbundtragwirkung sind neue, kleinskalige Verbundmittel erforderlich. Durch die Weiterentwicklung des Metall‐Schutzgasschweißverfahrens auf Basis des Kurzlichtbogenprozesses ist das so genannte Pin‐Schweißen möglich. Die Pins mit einer Höhe von wenigen Millimetern werden während des Schweißprozesses aus dem Schweißdraht geformt. Die so entstehenden Pin‐Strukturen können als Verbundmittel zwischen Stahl und Beton eingesetzt werden. In diesem Artikel werden die Untersuchungen zur Anwendbarkeit der Pin‐Strukturen im Verbundbau anhand von Versuchen zum Trag‐ und Verformungsverhalten unter statischer Schubbelastung vorgestellt. Investigations in the static shear capacity of small‐scaled pin shear connectors. The development of high‐strength steel as well as high‐strength (HSC) and ultra‐height strength (UHPC) concrete with a favorable ratio of strength to weight enables an essential reduction of the cross‐sectional dimensions compared to normal strength materials. Hereby, slender and wide spanning steel‐concrete composite construction with high load capacity can be realized. In some application area, the theoretical required concrete depth can be reduced to a few centimeter. In such composite constructions with thin concrete slabs, the use of e.g. headed studs or composite dowels as shear connector is not possible. To connect the partial sections of concrete and steel as well as to realize the composite load effect new small‐scaled shear connectors are required. Through the further development of gas‐shielded metal‐arc welding based on the short arc effect the pin welding is possible. The pins with a height of only few millimeters can be molded directly from the welding wire. The pin structures can be used as shear connectors in steel‐concrete composite constructions. This article presents the investigations in the applicability of the pin structures by means of static shear tests for the load and slip capacity.

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Section: Investigations In the Static Shear Capacity Of Small-scaled unclassified

Untersuchungen zur statischen Schubtragfähigkeit kleinskaliger Pin‐Verbundmittel

et al. 2016

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“…These stress concentration factors were derived from finite element calculations and verified by strain measurements in push-out and beam tests [9]. Depending on the cutting quality of the flame cut surfaces, detail category 125 or 140 according to EN 1993-1-9 [2] applies on the resistance side.…”

Section: Composite Dowel Stripsmentioning

confidence: 99%

Hot‐dip galvanized composite dowel strips

2016

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Comprehensive research during the last years showed that hot-dip galvanizing of steel members in bridge structures allows significant economic and ecological advantages. It could be demonstrated that the first corrosion protection can last over a bridge's lifetime of 100 years, even in an environment with a high corrosivity, so that no major maintenance measures of the corrosion protection are necessary. Parallel to this research, another innovative solution to increase the efficiency of composite bridges has been developed. Starting with several research projects and a first application in 2003, composite dowel strips offer a very economical solution for shear connections between steel girder and concrete slab in composite bridge constructions. Continuous improvement and further development finally led to a general technical approval by DIBt in Germany. Many bridges containing this new technology are built since then, not only in Germany. However hot-dip galvanizing may not be applied to bridges with composite dowel strips as the effects of the hot-dip galvanizing on the fatigue resistance of flame cut composite dowel strips are unknown. Therefore, the necessary fatigue check according to EC 3-1-9 [2] can currently not be carried out properly. A new research project was launched by the Institutes of Steel Construction of RWTH Aachen University and TU Dortmund University [4], with the aim to analyse the fatigue behaviour of hotdip galvanized composite dowel strips. Furthermore a simplified evidence of absence of cracks according to DASt-Guideline 022 [5] shall be performable by defining a detail class for composite dowel strips. The research work includes extensive experimental and numerical studies on the influences during hot-dip galvanizing and on the fatigue behaviour of galvanized dowel strips. First results of these studies will be presented in this paper as well as the experiences of a first bridge project with hot-dip galvanized composite dowel strips in Germany.

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“…Verbunddübelleisten führen insbesondere bei Verbundquerschnitten mit oberflanschlosen Stahlträgern zu besonders wirtschaftlichen Lösungen, da die wenig wirksame Querschnittsfläche des Baustahls in der Nähe der plastischen Nulllinie reduziert wird [1]. Bisher wurden Verbunddübelleisten vorwiegend in Ingenieurtragwerken wie z.…”

Section: Einleitung Und Problemstellungunclassified

Einfluss von Querrissen auf das Schubtragverhalten von Verbunddübelleisten in schlanken Betongurten

Claßen

Gallwoszus

Hegger

2014

Beton und Stahlbetonbau

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Influence of transversal cracking on the shear load bearing behavior of composite dowels in slender concrete chords Composite dowels are efficient, innovative shear connectors for use in engineering structures such as prefabricated composite bridges. Due to their ease of production in steel profiles with single-flange, their good load bearing and deformation properties and their applicability in slender concrete chords, composite dowels are increasingly being used in building construction. This paper describes push-out tests on puzzleshaped composite dowels for slender concrete chords with a thickness of only 10 cm. Besides different variants of reinforcement, in particular the influence of different longitudinal stress states and transverse cracking in the concrete slab has been explored. For this purpose an appropriate test setup has been developed. In previous approaches for the static shear strength of composite dowels, the influence of transverse cracking is neglected. However, the presented experiments with slender concrete chords show a significant effect of concrete cracking on the composite dowels' shear carrying capacity. The presented experiments were simulated and analyzed by a three-dimensional, non-linear finite element model of the push-out tests. Bild 1 Anwendungsbeispiele für Verbunddübelleisten nach [1]Application examples for composite dowels according to [1]

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Die Bemessung von Verbunddübelleisten nach neuer Allgemeiner bauaufsichtlicher Zulassung

Cited by 39 publications

References 11 publications

Untersuchungen zur statischen Schubtragfähigkeit kleinskaliger Pin‐Verbundmittel

Untersuchungen zur statischen Schubtragfähigkeit kleinskaliger Pin‐Verbundmittel

Hot‐dip galvanized composite dowel strips

Einfluss von Querrissen auf das Schubtragverhalten von Verbunddübelleisten in schlanken Betongurten

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