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  4. Development of a Mechanical Wedge-Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors
 
research article

Development of a Mechanical Wedge-Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors

Heydarinouri, Hossein
•
Motavalli, Masoud
•
Nussbaumer, Alain  
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June 1, 2021
Journal Of Composites For Construction

In this study, a mechanical anchorage for prestressed carbon fiber-reinforced polymer (CFRP) rods was proposed. The proposed anchorage consisted of a steel barrel with a conical hole and three separate aluminum wedges that are in direct contact with the CFRP rod. The anchorage system relied only upon friction, without any adhesives required. The static and fatigue behaviors of the anchor were experimentally investigated according to the European guidelines for testing post-tensioning kits and fulfilled their requirements. The average tensile strength of the anchorage system for the 8-mm CFRP rods was 2,371.4 MPa, being greater than the guaranteed value of 2,047 MPa. The fatigue tests revealed that the wedge seating distance (prior to pulling the rod) significantly affected the occurrence of slippage between the anchor components. Therefore, a new displacement-controlled presetting system was developed to ensure adequate wedge seating distance. It eliminated the need for hydraulic jacks and demonstrated the capability of applying presetting forces greater than 110 kN. Furthermore, the anchors were tested under loading frequencies of 5, 17, and 23 Hz. The proposed anchorage was observed to be insensitive to the loading frequency because no slippage or temperature rise occurred under these loading frequencies.

  • Details
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Type
research article
DOI
10.1061/(ASCE)CC.1943-5614.0001124
Web of Science ID

WOS:000672288400010

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

2021-06-01

Publisher

ASCE-AMER SOC CIVIL ENGINEERS

Published in
Journal Of Composites For Construction
Volume

25

Issue

3

Article Number

04021015

Subjects

Engineering, Civil

•

Mechanics

•

Materials Science, Composites

•

Engineering

•

Materials Science

•

cfrp tendon

•

fatigue

•

post-tensioning

•

strengthening

•

wedge-barrel anchor

•

tension-tension fatigue

•

system

•

performance

•

tendons

•

design

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
RESSLAB  
Available on Infoscience
July 31, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/180288
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