Hybride Konstruktionen an der BTU Cottbus‐Senftenberg

Bleicher, Achim; Schauer, Thomas; Jirasek, Robert; Höltke, Tim; Zhang, Yangwen; Marker, Paul; Wulff, Wulf; Manfrecola, Johannes; Schmidt, Therese

doi:10.1002/bate.202100056

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…The experimental results, which were presented in Bleicher et al 13 for the first bending and the first torsional mode, confirm these results. However, they differ from the ones presented here in the way of excitation.…”

Section: Experimental Validationsupporting

confidence: 76%

“…1,2 Hybrid structures can be defined in various ways, but the characteristic feature in all cases is the combination of different materials, elements, functions and technologies, which lead to an increase in efficiency on several design levels such as the material, cross-sectional, load-bearing, or structural level. 13 Specifically, in our proposed active hybrid roof structure concept, we combine structural members, which are elastically bend with structural members, which are subjected to normal forces only to balance forces.…”

Section: Basic Concepts For Active Hybrid Structuresmentioning

confidence: 99%

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Development, realization, and experimental validation of an active hybrid roof structure based on elastic kinetic and rigid-body transformation

Marker

Jirasek

Schmidt

et al. 2022

International Journal of Space Structures

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Elastic kinetic structures are a recent approach to design transformable structures. Their transformation is based on elastic bending, that is compliant component behavior of structural members. This principle can be used to realize transformable structures with a stable deployment process. Regardless of a stable transformation, elastic kinetic structures are prone to static and dynamic loads due to their lightweight design. However, most of current research on these structures solely focuses on the principles of transformation. This paper proposes a concept for an active hybrid roof structure with a transformation based on elastic kinetics and rigid-body motion. The concept exhibits a stable structural deployment and active control components to counteract static and dynamic disturbances. Furthermore, this paper includes the realization and experimental evaluation of a mid-scale prototype structure.

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Section: Experimental Validationsupporting

confidence: 76%

Section: Basic Concepts For Active Hybrid Structuresmentioning

confidence: 99%

Development, realization, and experimental validation of an active hybrid roof structure based on elastic kinetic and rigid-body transformation

Marker

Jirasek

Schmidt

et al. 2022

International Journal of Space Structures

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“…Therefore, the approach of using parallel moveable facade is more practical. This final structural concept is well described by Zhang et al (2021) and Bleicher et al (2021). For the realized mock-up the following boundary conditions were proposed by the team and can be summarized in few bullet points:…”

Section: Damping Facade -Structure and Designmentioning

confidence: 92%

How to Exploit the Glass Mass for Damping a Building?

Engelmann

Wulff

Lorenz

et al. 2022

CGC

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The worlds spectacular skylines host tall and slender buildings to create a maximum of office, residential and commercial space on a minimized footprint. These structures need to cope with increasing wind forces at height and are additionally affected by wind-induced vibration due to their lower natural frequencies. The resulting vibrations make users uncomfortable. Therefore, heavy tuned mass dampers are installed in structures and occupy valuable space especially in the costliest top-floors. As an example, Taipei 101’s steel damper is located between the 87th and 91st floor and weights astonishing 660 metric tons. This raises the need for additional reinforcement which increases cost and carbon footprint.Most buildings in expensive metropolises are cladded with remarkable glass facades. Therefore, we asked the question if it was possible to use the existing mass – more specifically the glass mass in a Double‑Skin Facade – to dampen the building’s movement, create a comfortable space for the user, exploit more floor area for the investor and finally to minimize the amount of building material to reduce carbon footprint for society. The idea was realized in a collaborative research effort of TU Berlin, BTU Cottbus-Senftenberg and Josef Gartner GmbH that resulted in a full-scale mock-up of a Double‑Skin Facade. Its outer skin can move laterally on a guide rail system. As the building starts to move, the facade's inner skin remains fixed to the base structure while the outer skin follows the building’s movement in a delayed manner due to its mass inertia. The fixed inner skin and the moveable outer skin are connected by a spring system that is tuned to the first natural frequency of the base structure. During the motion of the facade’s outer skin, the spring system redirects the relative movement and generates a stabilizing force for the base structure in the opposite direction. Additionally, an electrical machine is placed in between to provide an adjustable damping effect for semi-active and passive control. It also serves the purpose of a generator to study the opportunity to harvest energy. The paper shows the structural design options for the novel facade concept in the context of a project review of Double-Skin and Closed-Cavity Facades. The function of a full-scale mock-up, its fabrication and installation are described to show feasibility and ongoing challenges. First test results reveal a close match between theoretical assumptions and the applied testing. This engineering-driven and experimentally validated design opens a new field of architectural options in sustainable facade design which is focused on tuning physical parameters that affect the damping properties of the global structure.

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