Shape memory alloys for civil engineering structures - on the way from vision to reality

• Autorzy: Motavalli M. , Czaderski Ch. , Bergamini A. , Janke L.
• Języki publikacji: EN

Abstrakty

EN

Shape memory alloys (SMA) have been known for many decades. They are mainly used in medicine, electronics, air, and space industry and in the consumer goods industry. Examples are medical implants and instruments, cell phone antennas, frames for glasses, pipe couplings etc. The most usual SMA material on the market is nickel–titanium (Ni–Ti). Until today, SMAs have found very limited applications in civil engineering probably due to their cost and to limited knowledge of the material in the civil engineering industry. This paper presents existing applications, laboratory tests and new concepts of how to use shape memory alloys incorporated in energy dissipation devices, as well as for pre-stressing structures using SMA wires and for post stressing of existing structures using SMA tendons. Attempts to develop new generation of Iron based SMA for using in civil engineering structures will be presented as an alternative to existing high cost NiTi SMAs.

PL

Stopy z pamięcią kształtu znane są od wielu dziesięcioleci. Głównie są one wykorzystywane w medycynie, elektronice, przemyśle lotniczym i kosmicznym oraz w przemyśle towarów konsumpcyjnych. Przykładowo są to implanty i instrumenty medyczne, anteny telefonów komórkowych, oprawki okularów, złączki rurowe itp. Najbardziej typowym na rynku materiałem z pamięcią kształtu jest stop niklowo-tytanowy (Ni-Ti). Dotychczas stopy te miały bardzo ograniczone zastosowanie w budownictwie. Prawdopodobnie spowodowane to było kosztami i ograniczoną znajomością tego materiału w przemyśle budowlanym. W artykule tym przedstawiono istniejące zastosowania, badania laboratoryjne i nowe pomysły na wykorzystanie stopów z pamięcią kształtu będących częścią urządzeń rozpraszających energię, jak również w celu sprężania konstrukcji wykorzystując druty z tych stopów oraz sprężanie istniejących konstrukcji przy użyciu kabli wykonanych z takich stopów. Próby rozwijania nowej generacji stopów z pamięcią kształtu na bazie żelaza do wykorzystania w konstrukcjach budowlanych zaprezentowano jako alternatywę dla istniejących, drogich materiałów niklowo-tytanowych.

Słowa kluczowe

EN

shape memory alloy; energy dissipation; post-tensioning; iron based SMA

PL

stop z pamięcią kształtu; rozpraszanie energii; naprężenia

• Wydawca: Silesian University of Technology
• Czasopismo: Architecture Civil Engineering Environment
• Rocznik: 2009
• Tom: Vol. 2, no. 4
• Strony: 81--94
• Opis fizyczny: Bibliogr. 34 poz.

Twórcy

autor

Motavalli M.

autor

Czaderski Ch.

autor

Bergamini A.

autor

Janke L.

• Swiss Federal Laboratories for Materials Testing and Research (Empa), CH-8600 Dübendorf, Switzerland,

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