Photovoltaikelemente auf bestehenden Sandwichdachelementen – Einfaches Bemessungskonzept für Punktlasten

Naujoks, Bernd; Zapfe, Cedrik

doi:10.1002/stab.201201635

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…In the latter case, advantage can be achieved from the geometry, allowing the introduction of forces perpendicular panel by shear forces in fastenings or -in case of pressing forces -by patch loads into the webs of the profiled external face. The paper does not deal with the load-bearing behaviour and resistance of the panels itself; it focuses just on the local effects: Local loads might cause transverse bending and torsion in the sandwich panel and load transfer might be limited to an effective width [4,5]. In addition, composite action might occur [6,7], see also comment in chapter 5.…”

Section: Introductionmentioning

confidence: 99%

07.28: Fastening to face sheets of sandwich panels

Misiek

Käpplein

2017

ce papers

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In several applications the need to anchor loads in sandwich panels arises. This is normally done by introducing the load into one face, using mechanical fasteners such as screws or rivets for tensile and shear forces or contact for compression forces. Nowadays the most common example for these applications are fastening of solar cells (PV-modules) on sandwich roof panels or fastening of additional façade layers on sandwich wall panels. The paper deals with the different possibilities of introducing forces into the panels, covering both flat or lightly profiled faces used for walls and profiled faces used for roofs. Special attention is paid to design, including verification of fastenings, web crippling of profiled faces and effect on global load-bearing behaviour of the sandwich panels. In a second step, delamination caused by tensile forces is investigated in more detail: Pull-out failure is generally the acceptable failure mode and can be achieved by keeping a minimum edge distance. But if repeated loads such as wind loads are acting on the fasteners, the governing failure mode tends to be delamination at lower load levels. Small cracks in the bond layer grow until final failure of the connection or even of the complete sandwich panel by reducing the wrinkling strength of the face. To study both, the influence of the edge distance and the effect of repeated loads, experimental tests and numerical investigations were performed. The results are presented and discussed. ECCS TC7 TWG7.9 and CIB W056 are currently working on a document dealing with point and line loads acting on sandwich panels. Fastening to face sheets of sandwich panels is one of several topics. Thus the present paper may be regarded as a position paper, showing the state of the art related to a specific single item of the document and giving additional references related to this topic.

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Section: Introductionmentioning

confidence: 99%

07.28: Fastening to face sheets of sandwich panels

Misiek

Käpplein

2017

ce papers

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Praxisgerechte Nachweise zur Tragfähigkeit und Gebrauchstauglichkeit von Sandwichelementen mittels Fachwerkmodellen

Naujoks

Misiek

2015

Stahlbau

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Die Schnittgrößenermittlung für Systeme aus schubweichen Sandwichelementen kann auf einfache Art mittels Fachwerkmodellen erfolgen. Ausgehend von einer kurzen Darstellung der mechanischen Zusammenhänge werden die Modellierung, die Auswertung der Teilschnittgrößen sowie die Nachweisführung erläutert. Abschließend werden diese Erläuterungen mit Beispielen ergänzt.Practical checks at ultimate limit state and serviceability limit state of sandwich panels using truss systems. The calculation of internal forces of systems with shear-fl exible sandwich panels can be easily done using truss-systems. Starting with a short presentation of the mechanical context, modelling, evaluation of internal forces and verifi cation are explained. Examples support the explanation.

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Photovoltaikelemente auf bestehenden Sandwichdachelementen – Einfaches Bemessungskonzept für Punktlasten

Cited by 2 publications

References 2 publications

07.28: Fastening to face sheets of sandwich panels

07.28: Fastening to face sheets of sandwich panels

Praxisgerechte Nachweise zur Tragfähigkeit und Gebrauchstauglichkeit von Sandwichelementen mittels Fachwerkmodellen

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