Project Details
Projekt
Draft and production of double-curved lightweight concrete structures with bionic inspired force transmission elements by the use of flexible GFRP-formworks
Subject Area
Structural Engineering, Building Informatics and Construction Operation
Term
from 2014 to 2018
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 257332657
In recent years the modern architecture is determined by the trend to create buildings with organic and furthermore double curved surfaces. At present, the production of those large-scaled elements made of concrete necessitates complex formworks, which are typically costly and requiring a lot of material. With the flexible multi-layered GFRP-formworks from project phase one a new technological approach for a solution can relieve the drawbacks as far as possible. Thereby an adjustment of defined curvature states is made by the utilisation of the anisotropic structural behaviour. Thus produced curved elements of fibre reinforced concrete need a large number of fastening elements for the anchoring on buildings. Even so, those fastening elements dish the lightweight potential of such structures. To scheme the force transmission areas, new fastening elements shall be developed as metallic fractal inserts. Hence, an optimised interlocking of the different materials and consequently the best possible load transfer can be achieved. Furthermore, a full utilisation of the high specific properties of the compound element shall be accomplished with a variable assembly of the fibre orientation by means of the multi axial technique with variable weft- and warp-offset. The new multi axial technique works along the curved lines of force and particularly in the areas of force transmission. Because of the complex solid states of stress in the areas of force transmission, advanced computing and optimisation methods have to be involved. For the technological implementation of the double curved lightweight concrete structure an adjustment of the concrete depending on the curvature state should be realised. Especially the processing technology and rheological properties of the concrete matrix shall be explored and furthermore adjusted. Thereto, an artificial neuronal network based on bionic models should be generated and the property profile of the mineral matrix shall be optimised suitable. Finally a fast programming system is provided. Therefore, the calculation and civil engineers can suitably adjust the concrete properties regarding to fibre reinforcement and formwork elements.
DFG Programme
Priority Programmes
