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A platform for research: civil engineering, architecture and urbanism
Textile connectors for sandwich-facade-systems
Sandwich-facade-systems are highly adapted for wall designs from a constructional point of view. These precast elements are quick and easy to erect and posses excellent structural-physical qualities. Sandwich-facade-systems contain a load-bearing inner shell, a weatherproof outer shell and an insulating element in-between. Deformation-stress and loads from wind suction, wind pressure, temperature und self-load must be transferred from the outer shell into the inner shell or the substructure by pin connectors and support anchors (support connectors). The connectors need a sufficient extensional stiffness to resist stress from axial force. At the same time they must have a low flexural rigidity to allow a zero-stress deformation of the outer shell. By default the connectors are made of stainless steel. Thereby local thermal bridges are created and the insulating ability of the sandwich elements is lowered. The prevention of these thermal bridges is content of a research project between departments of the RWTH Aachen University and industrial partners. The stainless steel option will be replaced by a newly developed set of textile connectors. The material used in manufacturing is an innovative textile structure developed by the ITA. Its ability to reinforce concrete structures was proven by the RWTH Aachen University. The load-bearing fibres are aligned with the main loads. The new connectors will be tested in a sandwich-facade-element made out of textile reinforced concrete. Textile reinforced concrete offers the possibility of thin-walled inner and outer shells. The concrete shells to insulation material ratio can be structural- physically optimised under the restriction that the load-bearing capacity is conserved. The insulation capability can be increased without thickening the wall or the wall-thickness can be reduced without decreasing the insulation effect. The textile connectors further the use of sandwich-systems by avoiding thermal bridges and allowing civil engineering according to today's and tomorrows energetic standards.
Textile connectors for sandwich-facade-systems
Sandwich-facade-systems are highly adapted for wall designs from a constructional point of view. These precast elements are quick and easy to erect and posses excellent structural-physical qualities. Sandwich-facade-systems contain a load-bearing inner shell, a weatherproof outer shell and an insulating element in-between. Deformation-stress and loads from wind suction, wind pressure, temperature und self-load must be transferred from the outer shell into the inner shell or the substructure by pin connectors and support anchors (support connectors). The connectors need a sufficient extensional stiffness to resist stress from axial force. At the same time they must have a low flexural rigidity to allow a zero-stress deformation of the outer shell. By default the connectors are made of stainless steel. Thereby local thermal bridges are created and the insulating ability of the sandwich elements is lowered. The prevention of these thermal bridges is content of a research project between departments of the RWTH Aachen University and industrial partners. The stainless steel option will be replaced by a newly developed set of textile connectors. The material used in manufacturing is an innovative textile structure developed by the ITA. Its ability to reinforce concrete structures was proven by the RWTH Aachen University. The load-bearing fibres are aligned with the main loads. The new connectors will be tested in a sandwich-facade-element made out of textile reinforced concrete. Textile reinforced concrete offers the possibility of thin-walled inner and outer shells. The concrete shells to insulation material ratio can be structural- physically optimised under the restriction that the load-bearing capacity is conserved. The insulation capability can be increased without thickening the wall or the wall-thickness can be reduced without decreasing the insulation effect. The textile connectors further the use of sandwich-systems by avoiding thermal bridges and allowing civil engineering according to today's and tomorrows energetic standards.
Textile connectors for sandwich-facade-systems
Tomoscheit, Silke (author) / Horstmann, Michael (author) / Gries, Thomas (author) / Hegger, Josef (author)
2009
10 Seiten, 11 Bilder, 9 Quellen
Conference paper
Storage medium
English
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