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  4. Experimental Study on the Static and Fatigue Behaviour of a New Mechanical Wedge-Barrel Anchor
 
conference paper

Experimental Study on the Static and Fatigue Behaviour of a New Mechanical Wedge-Barrel Anchor

Heydarinouri, Hossein
•
Motavalli, Masoud
•
Nussbaumer, Alain  
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January 1, 2022
10Th International Conference On Frp Composites In Civil Engineering (Cice 2020/2021)
10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE)

Post-tensioned steel strands have been traditionally used in different prestressed structures such as concrete girders, post-tensioned concrete slabs, cable-stayed bridges, post-tensioned walls, etc. for a long time. However, due to the vulnerability of steel to the fatigue and corrosion, application of carbon fiber reinforced polymer (CFRP) rods, because of their higher strength-to-weight ratio, corrosion and fatigue resistance, is a good substitution for prestressed steel strands. Nevertheless, it is a major challenge to develop a purely mechanical anchorage for CFRP rods. In this study, a new mechanical anchorage for prestressed CFRP rods is introduced. The proposed anchor consists of a steel barrel with a conical hole and three separate aluminum wedges being in direct contact with the CFRP rod. The anchor system transfers the load through friction, without any adhesive required. The static and fatigue behavior of the anchor were experimentally investigated, following the Guideline for European Technical Approval of Post-Tensioning Systems (ETAG 013). The effect of various parameters such as friction between the wedges and the barrel and between the wedges and the CFRP rod and the level of the presetting force on the static and fatigue performance of the anchors were experimentally studied. In the static tests, the load carrying capacity of the post-tensioned system was much higher than the guaranteed strength of the CFRP rods. The fatigue tests indicate that no slippage occurs between different components of the anchor system during the cyclic loadings, and, no damage is accumulated in the system after 2 million cycles. In addition, it was observed that the high frequency of cyclic loadings does not affect the cyclic performance of the system; i.e. under high loading frequencies, no heat was generated in the anchor, since the components did not have any relative movements.

  • Details
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Type
conference paper
DOI
10.1007/978-3-030-88166-5_188
Web of Science ID

WOS:000767193200188

Author(s)
Heydarinouri, Hossein
Motavalli, Masoud
Nussbaumer, Alain  
Ghafoori, Elyas
Date Issued

2022-01-01

Publisher

SPRINGER-VERLAG SINGAPORE PTE LTD

Publisher place

Singapore

Published in
10Th International Conference On Frp Composites In Civil Engineering (Cice 2020/2021)
ISBN of the book

978-3-030-88166-5

978-3-030-88165-8

Series title/Series vol.

Lecture Notes in Civil Engineering; 198

Start page

2180

End page

2187

Subjects

Engineering, Civil

•

Engineering

•

wedge-barrel anchor

•

cfrp rod

•

post-tensioning

•

fatigue

•

system

•

tendons

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
RESSLAB  
Event nameEvent placeEvent date
10th International Conference on Fibre-Reinforced Polymer (FRP) Composites in Civil Engineering (CICE)

Istanbul, TURKEY

Dec 08-10, 2021

Available on Infoscience
April 11, 2022
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/186961
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