FRP tendon anchorage in post-tensioned concrete structures

Jacob Wittrup Schmidt, Björn Täljsten, Anders Bennitz, Pedersen Henning

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Strengthening of building structures by the use of various external post-tensioning steel tendon systems, is known to be a very efficient method. However, FRP as material in external post-tensioning projects has been investigated during the last decade. The advantages for this material are the high effective Young´s modulus and the high stress capacity in the linear elastic range of the material. The use of external tendons increases the requirements on the anchorage systems. This is in particular important when using un-bonded tendon systems, where the anchorage and deviators are the only force transfer points. The demand for high capacity anchorage tendons is fulfilled for steel tendons, but no competitive mechanical anchor has yet been developed for FRP tendon. A new small, reliable and more user friendly anchor has to be developed, before FRP tendons can be utilized with all of its capacity. Thus, several attempts of developing a mechanical FRP anchor have been made worldwide with promising results. Some of these attempts are presented in this paper together with an insight into a present research collaboration project at the Technical University of Denmark, Luleå University of Technology, Sweden, and COWI A/S, Denmark.
Original languageEnglish
Title of host publicationConcrete Repair, Rehabilitation and Retrofitting II
Number of pages455
Place of PublicationSouth Africa
PublisherCRC Press
Publication date2008
EditionII
Pages419-420
ISBN (Print)978-0-415-46850-3
Publication statusPublished - 2008
EventInternational Conference on concrete repair, Rehabilitation and Retrofitting - South Africa
Duration: 1 Jan 2008 → …
Conference number: 2

Conference

ConferenceInternational Conference on concrete repair, Rehabilitation and Retrofitting
Number2
CitySouth Africa
Period01/01/2008 → …

Bibliographical note

Includes a CD with the full version of each conferencepaper

Keywords

  • External post-tensioning, CFRP, Mechanical anchorage

Cite this

Schmidt, J. W., Täljsten, B., Bennitz, A., & Henning, P. (2008). FRP tendon anchorage in post-tensioned concrete structures. In Concrete Repair, Rehabilitation and Retrofitting II (II ed., pp. 419-420). South Africa: CRC Press.
Schmidt, Jacob Wittrup ; Täljsten, Björn ; Bennitz, Anders ; Henning, Pedersen. / FRP tendon anchorage in post-tensioned concrete structures. Concrete Repair, Rehabilitation and Retrofitting II. II. ed. South Africa : CRC Press, 2008. pp. 419-420
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Schmidt, JW, Täljsten, B, Bennitz, A & Henning, P 2008, FRP tendon anchorage in post-tensioned concrete structures. in Concrete Repair, Rehabilitation and Retrofitting II. II edn, CRC Press, South Africa, pp. 419-420, International Conference on concrete repair, Rehabilitation and Retrofitting, South Africa, 01/01/2008.

FRP tendon anchorage in post-tensioned concrete structures. / Schmidt, Jacob Wittrup; Täljsten, Björn; Bennitz, Anders; Henning, Pedersen.

Concrete Repair, Rehabilitation and Retrofitting II. II. ed. South Africa : CRC Press, 2008. p. 419-420.

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

TY - GEN

T1 - FRP tendon anchorage in post-tensioned concrete structures

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N2 - Strengthening of building structures by the use of various external post-tensioning steel tendon systems, is known to be a very efficient method. However, FRP as material in external post-tensioning projects has been investigated during the last decade. The advantages for this material are the high effective Young´s modulus and the high stress capacity in the linear elastic range of the material. The use of external tendons increases the requirements on the anchorage systems. This is in particular important when using un-bonded tendon systems, where the anchorage and deviators are the only force transfer points. The demand for high capacity anchorage tendons is fulfilled for steel tendons, but no competitive mechanical anchor has yet been developed for FRP tendon. A new small, reliable and more user friendly anchor has to be developed, before FRP tendons can be utilized with all of its capacity. Thus, several attempts of developing a mechanical FRP anchor have been made worldwide with promising results. Some of these attempts are presented in this paper together with an insight into a present research collaboration project at the Technical University of Denmark, Luleå University of Technology, Sweden, and COWI A/S, Denmark.

AB - Strengthening of building structures by the use of various external post-tensioning steel tendon systems, is known to be a very efficient method. However, FRP as material in external post-tensioning projects has been investigated during the last decade. The advantages for this material are the high effective Young´s modulus and the high stress capacity in the linear elastic range of the material. The use of external tendons increases the requirements on the anchorage systems. This is in particular important when using un-bonded tendon systems, where the anchorage and deviators are the only force transfer points. The demand for high capacity anchorage tendons is fulfilled for steel tendons, but no competitive mechanical anchor has yet been developed for FRP tendon. A new small, reliable and more user friendly anchor has to be developed, before FRP tendons can be utilized with all of its capacity. Thus, several attempts of developing a mechanical FRP anchor have been made worldwide with promising results. Some of these attempts are presented in this paper together with an insight into a present research collaboration project at the Technical University of Denmark, Luleå University of Technology, Sweden, and COWI A/S, Denmark.

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Schmidt JW, Täljsten B, Bennitz A, Henning P. FRP tendon anchorage in post-tensioned concrete structures. In Concrete Repair, Rehabilitation and Retrofitting II. II ed. South Africa: CRC Press. 2008. p. 419-420