Re-fer Ag

Eidgenoessische Materialpruefungs- Und Forschungsanstalt Empa

Eidgenossische Materialprufungs-und Forschungsanstalt Empa

Wookijn Lee

Masoud Motavalli

Christoph Czaderski

Christian Leinenbach

Benedikt Weber

Rolf Broennimann

Rolf Brönnimann

Julien Michels

Moslem Shahverdi

The method includes a tension element, for example in the form of flat steel, that is placed on the structure or structural part and can be guided around a corner. The flat steel can also wrap as a band around the structure, in which the two ends of the flat steel are either connected to one another or are separately connected to the structure by the end anchors or intersect to produce a clamping connection. The flat steel contracts as a result of a subsequent active and controlled input of heat using a heating element and generates a permanent tensile stress and, correspondingly, a permanent prestress on the structure. The structure, as equipped, has at least one tension element as a shape memory alloy which extends along the outer side of the structure and is connected by one or more end anchors.

Method for producing prestressed structures and structural parts by means of SMA tension elements, and structure and structural part equipped therewith

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Cheonan-si, South Korea

Wookijn Lee