A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Façade Brackets for Blast Enhancement
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.
Façade Brackets for Blast Enhancement
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.
Façade Brackets for Blast Enhancement
Wellershoff, Frank (author) / Förch, Matthias (author) / Lori, Guido (author) / Zobec, Marc (author) / Casucci, Daniele (author) / Grosser, Philipp (author)
ce/papers ; 2 ; 351-367
2018-10-01
17 pages
Article (Journal)
Electronic Resource
English
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