Verbundtragwerke aus Stahl und Beton, Bemessung und Konstruktion

Hanswille, Gerhard; Schäfer, Markus; Bergmann, Marco

doi:10.1002/9783433607701.ch2

Cited by 16 publications

(9 citation statements)

References 45 publications

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“…Thus, the reliability check in the case of non-linear design is not carried out in accordance with expression (4). According to [10], the following condition should be verified:…”

Section: Composite Column Calculation Methodsmentioning

confidence: 99%

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Composite columns made of concrete-filled hollow steel sections with embedded steel cores

2017

JCE

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A review of current surveys related to composite columns made of concrete filled tubes with embedded steel cores, known as Geilinger columns, is presented in the paper. Advantages and scope of application of this innovative composite column type are presented. Calculation of such columns according to the general method given in EN 1994-1-1, which is applied with known geometrical and structural imperfections, is explained. The simplified calculation method suitable for engineering practice is also considered. The aspects of fire resistance design are discussed. Spregnuti stupovi s poprečnim presjekom od šuplje cijevi ispunjene betonom i s umetnutom čeličnom jezgrom U radu je prikazan pregled suvremenih istraživanja spregnutih stupova izvedenih s cijevima ispunjenim betonom i s umetnutim čeličnim jezgrama, a poznatih su kao Geilinger stupovi. Prikazane su prednosti i područje primjene tih inovativnih tipova spregnutih stupova. Objašnjen je proračun ovakvih stupova prema općoj metodi danoj u EN 1994-1-1 koja se primjenjuje s poznatim geometrijskim i strukturnim nesavršenostima. Također je razmatrana pojednostavnjena metoda proračuna prikladna za inženjersku praksu. Obrazloženi su aspekti proračuna požarne otpornosti.

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“…Thus, the reliability check in the case of non-linear design is not carried out in accordance with expression (4). According to [10], the following condition should be verified:…”

Section: Composite Column Calculation Methodsmentioning

confidence: 99%

“…b) Surface concrete -steel tube (10) In Exps. (9) and (10): The calculation of the critical surface steel core-concrete resistance is carried out in the following way.…”

Section: Load Introduction Through Steel Corementioning

confidence: 99%

Composite columns made of concrete-filled hollow steel sections with embedded steel cores

2017

JCE

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“…The perimeter u takes into account the cross-sectional perimeter of the surfaces exposed to drying. This is generally the upper concrete surface in the case of a concrete flange realized by semi-finished slabs or the use of profiled sheeting [12], whereas with in situ concrete flanges, the upper and lower surfaces must be considered.…”

Section: Design and Researchmentioning

confidence: 99%

European design code for composite structures in steel and concrete

Schäfer

2019

Steel Construction

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The Eurocodes (EC) represent European norms (EN) for the design and construction of building and bridge structures. The development of these European design codes is carried out on behalf of the European Union (EU) by the ”European Committee for Standardization – CEN“. The Eurocodes have been in use for some years now. The motivation behind the development of the Eurocodes is the harmonization of the planning and design process for the structural components and construction elements of buildings and bridges all over Europe. Based on the experience gained through the use of the Eurocode conditions in recent years and many comments from industry, a revision of all parts of the Eurocode is currently in progress. The aim is to adapt the current design standards to the state of the art and research, to simplify the application and to harmonize the Eurocodes with each other. Finally, these modifications will be transferred to the second generation of European standards. An overview of the development phases and project teams is presented in this paper, accompanied by an insight into current standardization work and the technical discussions, mainly focusing on EN 1994‐1‐1.

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“…EN 1994-1-1 still provides a limitation of plastic design but only for sections with steel grades S420 and S460. Whereby, the plastic moment resistance has to be reduced by a coefficient β, depending on relationship xpl/h, because due to the large compression zones the design moment capacity is restricted by attaining the ultimate strain in the concrete chord [15].…”

Section: Comparison Of Plastic and Strain Limited Bending Designmentioning

confidence: 99%

08.04: Limits of plastic design for composite beams: Requirements for slim and compact composite sections

Schäfer

2017

ce papers

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Due to the demand for sustainable constructions, composite structures become more important and lead to slim and economic solutions. The determination of moment resistance for composite beams follows the rules for composite structures according to EN 1994-1-1. For the plastic design it is still assumed, that each cross-sectional fibre can plastify without any limitation of strains. For normal composite beams in case of sagging moments and a high-lying plastic neutral axis, the real moment resistance is slightly higher than the plastic resistance. This is based on the large strains at the bottom side of the section, so that the lower steel flange reaches the solidification range. In case of sections with a large compression zone height xpl, a concrete failure in the compression zone can happen before reaching the plastic moment resistance. In these cases a strain limit design, based on the strain-stress relationships of concrete and steel, becomes decisive. EN 1994-1-1 provides only for cross-sections of classes 1 and 2 in steel grades S420 and S460 a limitation of plastic design. It is to point out, that the rotation capacity of a composite section is not only conditioned by the b/t ratio of the steel section, but also the concrete part has a significant impact. This applies not only for high steel grades. Though, in Eurocode 4 there are no further regulations given for sections with lower steel grades. Especially, the more and more upcoming integrated and compact composite sections underline the importance of such requirements. Therefore, the objective of the recent research is concentrated on the development of additional regulations, to consider the influence of concrete compression zone height onto the moment resistance of composite beams.

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Verbundtragwerke aus Stahl und Beton, Bemessung und Konstruktion

Cited by 16 publications

References 45 publications

Composite columns made of concrete-filled hollow steel sections with embedded steel cores

Composite columns made of concrete-filled hollow steel sections with embedded steel cores

European design code for composite structures in steel and concrete

08.04: Limits of plastic design for composite beams: Requirements for slim and compact composite sections

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