SAMPE Journal - January/February 2021 - 30

FEATURE / REINFORCED POLYMER HANGERS
C4) should occur after 100 years or earlier because
the bridge is no longer needed, the CFRP hangers
could continue to be used as tension members in
crane construction, for example. If that would not
be possible, the titanium thimbles are classically recyclable. So far, CFRP has been shredded and
added to asphalt as reinforcement of heavy loaded
road pavements. For five years now, there have been
companies in England that recover the fibres from
CFRP and reuse them for less demanding applications.

ACKNOWLEDGMENTS
The authors would like to thank Prof. Dr.-Ing. Ulrike Kuhlmann for her support
as structural engineering surveyor, Prof. Dr. Masoud Motavalli, Robert Widman
and his team for the assistance during the fatigue experiments, Dr.-Ing. Geert
Schellenberg for the estimation of the ultimate loads and the responsible authorities of Baden-Württemberg for the single case approval.
REFERENCES
1. U. Meier, Multiplication of the critical span of suspension bridges through the use of
high-performance composites. Proceedings Coloquio Internacional sobre la factibilidad
de una comunicación fija a través del Estrecho de Gibraltar. Tomo 1, 1982, ISBN 84-5008985-7, 481-484.

CONCLUSIONS
In the case of the Stuttgart network arch bridge,
CFRP tendons are winning for the first time in a competition based on initial cost against steel. CFRPs are
best matching the specific required material properties for this type of bridge. This allows in future
expanding the economically meaningful span for
network arch bridges significantly over 300m span9.
This first relatively large bridge fully relying on CFRP
hangers will build up more and broader acceptance
of the application of CFRP for tendons.

2. U. Meier, Carbon Fiber-Reinforced Polymers: Modern Materials in Bridge Engineering,
Structural Engineering International, Volume 2, 1992, p. 7-12.
3. U. Meier, R. Brönnimann, P. Anderegg, in J. G. Teng, J. G. Dai (Eds.), Proceedings of the
Eighth International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil
Engineering (CICE) 2016, p. 1069-1074.
4. A. U. Winistoerfer, Development of non-laminated advanced composite straps for civil
engineering applications, University of Warwick, PhD thesis 1999.
5. A. Winistoerfer, U. Meier, J. Lees, Carbostrap - Advanced composite tendons, in S.
Bandyopadhyay et al (Eds), ISBN 0 7334 0791 9, Proc ACUN-3 " Technology Convergence in Composites Applications " , UNSW, SYDNEY, Australia, 6-9 February 2001;
https://www.dora.lib4ri.ch/EMPA/islandora/object/EMPA%3A8213/datastream/PDF/
Winist%C3%B6rfer-2001-CARBOSTRAP_-_Advanced_composite_tendons-%28published_version%29.pdf.
6. A. Winistoerfer, U. Meier, Multilayer Traction Element in the Form of a
Loop, US-Patent 6'209'279 B l, Apr. 3, 2001.
7. J. M. Lees, A. U. Winistoerfer, U. Meier, External Prestressed Carbon Fiber-Reinforced Polymer Straps for Shear Enhancement of Concrete, Journal of Composites for Construction, Vol. 6, 2002, p. 249-256.
8. L. Haspel, Bauen mit Zuggliedern aus Carbon, Proceedings 14. Fachtagung
Baustatik - Baupraxis, 08.-09. März 2021, Universität Stuttgart.
9. L. Haspel, Netzwerkbogenbrücken mit Hängern aus Carbon, Stahlbau
88 (2019), Heft 2, S. 153-159.
10. M. Fettke, Phänomen der wirbelerregten Querschwingungen bei
Netzwerkbogenbrücken im Eisenbahnverkehr, Stahlbau 86, 2017, H. 12, S.
1063-1072.
11. Technischen Lieferbedingungen und Technischen Prüfvorschriften für
Ingenieurbauten, TL/TP-ING, Teil 4, Abschnitt 4, Technische Lieferbedingungen und Technische Prüfvorschriften für vollverschlossene Seile, Anhang C, Ermittlung der Verformungsmoduli.
12. G. P. Terrasi, F. Baschnagel, J. Gao, U. Meier, Fatigue behaviour of laminated carbon fibre reinforced polymer straps for bridge suspenders;
ECCM17 - 17th European Conference on Composite Materials, Munich, Germany, 26-30th June 2016.
13. F. Baschnagel, V. Rohr, G. P. Terrasi, Fretting Fatigue Behaviour of
Pin-Loaded Thermoset Carbon-Fibre-Reinforced Polymer (CFRP) Straps,
Polymers 2016, 8, 124; doi:10.3390/polym8040124.
14. H. Schürmann, Konstruieren mit Faser-Kunststoff-Verbunden, ISBN
978-3-540-72190-1, Springer Verlag 2007, p. 485-500.
15. H. Hamada, N. Oya, K. Yamashita, Z.-I. Maekawa, Tensile Strength
and its Scatter of Unidirectional Carbon Fibre Reinforced Composites, Journal of Reinforced Plastics and Composites, Volume: 16 issue: 2, pages: 119-130, Issue published: January 1, 1997, DOI: https://doi.
org/10.1177/073168449701600202.
16. M. Deuring, Brandversuche an nachträglich verstärkten Trägern aus
Beton, EMPA-Untersuchung Nr. 148'795, 1994.

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