Issue |
ESOMAT 2009
2009
|
|
---|---|---|
Article Number | 07016 | |
Number of page(s) | 6 | |
Section | Applied Research and Applications: Applications | |
DOI | https://doi.org/10.1051/esomat/200907016 | |
Published online | 01 September 2009 |
DOI: 10.1051/esomat/200907016
The SMA properties in civil engineering applications. The SMARTeR project: Use of SMA in damping of stayed cables for bridges
V. Torra1, A. Isalgue1, G. Carreras1, F.C. Lovey1, 2, H. Soul1, 2, P. Terriault1, 3 and B. Zapico1, 41 CIRG-Applied Physics, ETSECCPB, UPC, Barcelona, Catalonia, E-08034 Spain
2 Centro Atomico Bariloche (CAB-IB) Bariloche, 8400 Argentina
3 LAMSI, ETS, Université de Québec, H3C 1K3 Montréal, Ca.
4 ELSA Lab. Joint Research Center – EU, Ispra, 21020 (VA)-Italy
vtorra@fa.upc.edu
Published online: 1 September 2009
Abstract
One of the classical applications of the SMA is based on the used of the hysteresis
cycle associated to the martensitic transformation (classically, described as a first order
phase transition) for damping devices. For each application a detailed knowledge of the
conditions to be accomplished by the material is absolutely necessary. For the stayed
cables in bridges of the Iroise bridge, the oscillation frequencies are 1 and 3 Hz;
and the peak to peak oscillation amplitude is close to 10 cm and, also, the SMA works
in close contact with the external ambient temperature. In fact, the bridge is a 2*2
lanes free highway situated between Brest and Plougastel (France). The main requirement
is related to several days of intense winds or rain associated to strong storms.
The conditions imposed to the samples suggest appropriate behavior for, at least,
500000 cycles of working. The experimental analysis, centered in NiTi, is focused in 1)
the fatigue life of the samples, 2) the evaluation of the Clausius-Clapeyron coefficient, 3)
assuring that the degradation of the material properties remains below a safety limit in the
expected time scale of application, 4) modeling the cable behavior to show the positive
damping capacity of SMA and 5) studying the applications in semi-realistic scale in the
ELSA-JRC (a civil engineering facility in Ispra, Italy) demonstrating the positive effect
of the SMA.
© Owned by the authors, published by EDP Sciences 2009