Konstruktion und Berechnung von explosionshemmenden Seilnetzfassaden

Wellershoff, Frank; Gebbeken, Norbert; Teich, Martien; Nehring, Gordon

doi:10.1002/stab.201201501

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…7b and 7d). The blast load is in accordance with Wellershoff et al (2012, originally in US GSA, 2001) and ISO 16933 (2007(E)). In difference to previous section, laminated glass instead of DGU and TGU is considered for the further study.…”

Section: Thermal Calculation Of Typical Dgu and Tgu Of Facadesmentioning

confidence: 93%

Time-Temperature Dependency of Laminated Glass Subjected to Blast Load – A Numerical Study

Förch

2020

International Journal of Structural Glass and Advanced Material

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The behavior of laminated glass has strong time-temperature dependency. Viscoelastic material models are often employed to define mechanical properties of Polyvinyl Butyral (PVB), the most common interlayer for structural glass applications. However, it is an apparent notion to simplify the high complexity of such material models, as only specific software is capable of considering this behavior. Most studies in blast design of laminated glass have focused on room temperature condition and recommend the use of elastic material models for PVB with high modulus of elasticity for simplification. The main purpose of this study is to develop an understanding of time and temperature dependency of interlayers in real building application. On the basis of empirical weather data, a range of interlayer temperatures is proposed to be considered for blast design situation in Germany for vertical double glazed and triple glazed units in accordance with Eurocode 0 and Eurocode 1. The results obtained from this analysis are further investigated within a transient structural parametric study of laminated glass to identify the effect of winter interlayer temperature and summer interlayer temperature in difference to simplified monolithic glass approach. As a result, significant increase of maximum principal glass stress and maximum deformation is observed for laminated glass subjected to blast load under summer temperature condition.

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Section: Thermal Calculation Of Typical Dgu and Tgu Of Facadesmentioning

confidence: 93%

Time-Temperature Dependency of Laminated Glass Subjected to Blast Load – A Numerical Study

Förch

2020

International Journal of Structural Glass and Advanced Material

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“…Usually, only the positive phase is considered in blast design by idealized blast load, assuming a maximum reflected overpressure pr,max dropping linearly to zero. Failure of the façade to the outside of the building due to underpressure phase is condoned within this assumption (Wellershoff et al [7]). However, some tender specifications recommend consideration of positive and negative phase effects as the specific impulse is approximately on the same level.…”

Section: Blast Loadmentioning

confidence: 99%

Façade Brackets for Blast Enhancement

et al. 2018

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Design requirements for bomb blast protection are a challenge for façade engineers because of complex interaction of various elements with different mass and nonlinear stiffness. There are different mitigation techniques available depending on the hazard rating. Rigid protecting structures are neither accepted by architectural design demands, nor by occupants who do not want to be affected by obvious protection in daily life. As a result, smart blast enhanced façade solutions that cannot be distinguished from conventional facades are required, being capable of providing the required safety level. With introduction of dissipative façade brackets the dynamic analysis of the MDOF system of the façade can be balanced due to beneficial inertia effects. The dissipative bracket attracts the blast wave energy in lieu of the glazing, so that a switch of the typical load chain becomes possible. The probability that the glazing remains in uncracked state increases while the dissipative bracket dissipates the energy. In addition, the reaction to the primary structure can be mitigated. Finally, the anchor channel that connects the bracket to the concrete slab can be designed to stay in the elastic range. This reduces the refurbishment costs after a blast event. Experimental test results of different crash absorbing materials, dissipative brackets, and anchor channels are used for the development of combined design charts for the selection of adequate brackets and anchor channels.

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“…Es wurden erste Bauteilversuche mit dem entwickelten Material in einer Seilendverankerung einer Seilnetzfassade [4,8] durchgeführt. Das Material M6 weist in den Materialversuchen aufgrund der Zugabe eines Gasbildners ein sehr günstiges Nachbruch-und Komprimierungsverhalten mit ausgeprägtem Lastplateau und eine erst spät eintretende Verfestigung auf und wurde daher in den Bauteilversuchen eingesetzt.…”

Section: Allgemeinesunclassified

Zementgebundenes Crashmaterial für Schutzbauteile in explosionsbeanspruchten Fassaden

et al. 2014

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Die Forderung, für repräsentative Bauwerke wie Botschaften und Flughäfen auch außergewöhnliche Lasten aus Explosion zu berücksichtigen, wurde in jüngerer Vergangenheit zunehmend gestellt. Das aufgrund dieser Lasten zu erwartende Schadensausmaß kann durch den Einsatz von energiedissipierenden Schutzbauteilen in der Fassadenbefestigung begrenzt werden. Die Dissipation der Explosionsenergie in den Schutzbauteilen kann beispielsweise über ein Crashmaterial erfolgen. In diesem Aufsatz werden Untersuchungen an zementgebundenen Materialien, die diesem Zweck dienen sollen, vorgestellt. Der Einfluss unterschiedlicher Zusätze auf die für ein Crashmaterial maßgebenden Eigenschaften wird in einer Parameterstudie untersucht. Als besonders geeignet wird ein Material identifiziert, bei dem die Zugabe eines Gasbildners das Matrixgefüge im Hinblick auf das gewünschte Kraft‐Verformungs‐Verhalten positiv verändert. Dynamische Versuche mit diesem Material geben Aufschluss über dessen Komprimierungsverhalten bei hohen Stauchraten.Cementitious crash material for façade connectors of buildings under impulsive blast loadsIn the past few years public awareness of the need to protect structures against blast effects has risen. Energy dissipating protective components placed at the façade connectors allow protecting people in the building as well as the primary building structure from damage due to blast loads. One possibility to dissipate the blast energy is using protective components with crash material. This paper presents tests on cementitious crash materials studying the effect of different additives to the compression‐behavior of the material. Additional experiments enable analyzing the material behavior under static and dynamic test conditions.

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Konstruktion und Berechnung von explosionshemmenden Seilnetzfassaden

Cited by 9 publications

References 7 publications

Time-Temperature Dependency of Laminated Glass Subjected to Blast Load – A Numerical Study

Time-Temperature Dependency of Laminated Glass Subjected to Blast Load – A Numerical Study

Façade Brackets for Blast Enhancement

Zementgebundenes Crashmaterial für Schutzbauteile in explosionsbeanspruchten Fassaden

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