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

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

Externe Organisationen

  • Eidgenössische Technische Hochschule Lausanne (ETHL)
  • Eidgenössische Materialprüfungs- und Forschungsanstalt (EMPA)
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Details

OriginalspracheEnglisch
Aufsatznummer04021015
FachzeitschriftJournal of Composites for Construction
Jahrgang25
Ausgabenummer3
PublikationsstatusVeröffentlicht - 1 Juni 2021
Extern publiziertJa

Abstract

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.

ASJC Scopus Sachgebiete

Zitieren

Development of a Mechanical Wedge-Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors. / Heydarinouri, Hossein; Motavalli, Masoud; Nussbaumer, Alain et al.
in: Journal of Composites for Construction, Jahrgang 25, Nr. 3, 04021015, 01.06.2021.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Heydarinouri H, Motavalli M, Nussbaumer A, Ghafoori E. Development of a Mechanical Wedge-Barrel Anchor for CFRP Rods: Static and Fatigue Behaviors. Journal of Composites for Construction. 2021 Jun 1;25(3):04021015. doi: 10.1061/(ASCE)CC.1943-5614.0001124
Heydarinouri, Hossein ; Motavalli, Masoud ; Nussbaumer, Alain et al. / Development of a Mechanical Wedge-Barrel Anchor for CFRP Rods : Static and Fatigue Behaviors. in: Journal of Composites for Construction. 2021 ; Jahrgang 25, Nr. 3.
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abstract = "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.",
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note = "Funding Information: The authors acknowledge the Innosuisse Swiss Innovation Agency (Grant No. 19240.1 PFIW-IW) for funding this research project. The authors acknowledge the financial and technical support from the project partners, namely, S&P Clever Reinforcement Company AG, Switzerland; the Swiss Federal Railways (SBB) AG, Bern, Switzerland; and dsp Ingenieure + Planer AG Engineering Office, Uster, Switzerland. Publisher Copyright: {\textcopyright} 2021 American Society of Civil Engineers.",
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T2 - Static and Fatigue Behaviors

AU - Heydarinouri, Hossein

AU - Motavalli, Masoud

AU - Nussbaumer, Alain

AU - Ghafoori, Elyas

N1 - Funding Information: The authors acknowledge the Innosuisse Swiss Innovation Agency (Grant No. 19240.1 PFIW-IW) for funding this research project. The authors acknowledge the financial and technical support from the project partners, namely, S&P Clever Reinforcement Company AG, Switzerland; the Swiss Federal Railways (SBB) AG, Bern, Switzerland; and dsp Ingenieure + Planer AG Engineering Office, Uster, Switzerland. Publisher Copyright: © 2021 American Society of Civil Engineers.

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Y1 - 2021/6/1

N2 - 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.

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