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<p>Modern high performance materials like Textile Reinforced Concrete (TRC) offer new possibilities for the construction of very filigree and lightweight structures. Prefabricated plate elements can be transformed into complex three-dimensional shapes by folding without a laborious construction of curved formworks. In order to exploit the design space within the envisioned technology a method was proposed involving form-finding, simulation of folding process, and production concepts, as well as an assessment of structural performance. Since inspiration for this approach was derived from the ancient art of paper folding origami (ori=folding; gami = paper), we call the method oricreate and its application to concrete oricrete (ori- and con<b>crete</b>). By using the design and manufacturing methods, several prototypes of folded plate structures have been realized and tested with sizes up to 2,4 m x 3 m. The design and manufacturing process of folded structures and experimental investigations are described and methods for strengthening proposed.</p>

Blast loading scenarios and the corresponding hazards have to be evaluated for infrastructure elements and buildings especially at industrial sites for safety and security issues. Point fixed corrugated metal sheets are often applied as façade elements and can become a hazard for humans if they are pulled off. This paper investigates the dynamic bearing capacity of such structural members in terms of their general bending behavior in the middle of the span and pull-out behaviors at the fixing points. The elements are fixed at two sides and the load transfer is uniaxial. An experimental series with static and dynamic tests forms the basis to identify the predominant failure modes and to quantify the maximum stress values that can be absorbed until the investigated structural members fail. The experimental findings are applied to create and to optimize an engineering model for the fast and effective assessment of the structural response. The aim is the derivation of a validated model which is capable to predict the blast loading behavior of metal sheets including arbitrary dimensions, material properties, and screw connections. Results of this study can be integrated into a systematic risk and resilience management process to assess expected damage effects and the evaluation of robustness.

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Der vorliegende Aufsatz stellt ein Konzept für den Entwurf und die Herstellung von gefalteten schalenförmigen Tragstrukturen aus zementbasierten Verbundwerkstoffen vor, das in Anlehnung an die japanische Papierfaltkunst Origami entwickelt wurde. Die räumlichen Tragstrukturen werden durch Faltung von ebenen Elementen mit vorgegebenen Faltlinien hergestellt. Ziel ist die Entwicklung einer Entwurfs‐ und Herstellmethodik für dünnwandige Faltwerke mit einfachen oder doppelt gekrümmten Geometrien, die als segmentierbare Hüll‐ und Konstruktionselemente mit optimierten mechanischen Eigenschaften eingesetzt werden können. Wegen der hohen Variabilität der Formen und der großen Anzahl von Freiheitsgraden der Faltstrukturen ist eine Unterstützung mit numerischer Simulation in allen Phasen des Entwurfs und der Herstellung unabdingbar. Gegenüber der traditionellen Herstellung von Schalentragwerken mithilfe aufwendiger gekrümmter Schalungen verspricht die Methodik ein hohes Potenzial an Wirtschaftlichkeit. Insbesondere durch die Verwendung von modernen, zementbasierten Verbundwerkstoffen werden durch das Konzept neue Anwendungsfelder erschlossen, die sich durch geringen Materialverbrauch, einen hohen Ausnutzungsgrad des Werkstoffs sowie eine einfache systematische Herstellung auszeichnen. Oricrete – design and manufacturing methodology for folded plate structures made of novel cementitious composites The present paper shows an approach for the design and production of folded plate structures made out of novel cementious composite materials. The idea of the approach is derived from the Japanese art of paper folding, origami. The spatial structures are obtained by folding of planar elements provided with prescribed crease lines. The aim of the present work is the development of a design and manufacturing method for the production of free‐form structural members with optimized mechanical properties applicable as façade and load bearing segments. Due to the high variability of forms and the large amount of degrees of freedom of the fold patterns, a support by numerical simulation in all phases of design and production is required. The method has a high potential to reduce the production costs compared to traditionally fabricated shell structures with complex curved formworks. New fields of application for cementious composite materials can be entered that are characterized by low material consumption, a high exploitation of the material and a systematic manufacturing process.