Details
| Original language | English |
|---|---|
| Title of host publication | ReConStruct |
| Subtitle of host publication | Resilient Concrete Structures - Proceedings of the 20th fib Symposium, 2024 |
| Editors | Richard S. Henry, Alessandro Palermo |
| Publisher | fib. The International Federation for Structural Concrete |
| Pages | 215-222 |
| Number of pages | 8 |
| ISBN (print) | 9782940643257 |
| Publication status | Published - 2024 |
| Event | 20th fib Symposium on ReConStruct: Resilient Concrete Structures, 2024 - Christchurch, New Zealand Duration: 11 Nov 2024 → 13 Nov 2024 |
Publication series
| Name | fib Symposium |
|---|---|
| ISSN (Print) | 2617-4820 |
Abstract
High-strength concretes enable filigree concrete structures which are prone to cyclic loading. Regarding the design of concrete structures under compressive fatigue loading, the fatigue resistance is increasingly reduced for higher concrete strengths in guidelines and standards, such as Model Code 2020 or Eurocode 2, accounting for the fear of increased fatigue sensitivity with increasing strength and brittleness of the concrete. This reduces their potential dramatically in fatigue-loaded structures. The discussion concerning the influence of the concrete strength on the fatigue resistance has been ongoing for decades. Controversial results are documented in the literature. However, several results show that concretes with higher strengths do not have a reduced fatigue resistance. Nevertheless, the strength-dependent reduction of the concrete’s fatigue resistance is still included in standards and guidelines. The influence of the concrete strength on the fatigue resistance has been investigated for several years within different projects at the Institute of Building Materials Science, Leibniz University of Hannover. Accordingly, concretes of different strengths have been investigated. Furthermore, our own test data and around 2,100 data points available in literature were analysed together to fundamentally answer the question of whether highstrength concretes have a reduced fatigue resistance. Data from our own tests are shown comparatively and the results of the overall analyses of data from literature are presented and discussed in this paper. Altogether, a clear result was obtained: The fatigue resistance of concrete does not decrease with increasing concrete strength. Thus, the design regulations have to be approved to significantly increase the potential of high-strength concrete in fatigue-loaded structures.
Keywords
- Concrete strength, Cyclic compression, Fatigue resistance, HPC, Numbers of cycles to failure, UHPC
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
- Engineering(all)
- Building and Construction
- Materials Science(all)
- Materials Science (miscellaneous)
Cite this
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ReConStruct: Resilient Concrete Structures - Proceedings of the 20th fib Symposium, 2024. ed. / Richard S. Henry; Alessandro Palermo. fib. The International Federation for Structural Concrete, 2024. p. 215-222 (fib Symposium).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Does the fatigue resistance really decrease with higher concrete strength?
AU - Basaldella, M.
AU - Lohaus, L.
AU - Oneschkow, N.
N1 - Publisher Copyright: © fédération internationale du béton (fib).
PY - 2024
Y1 - 2024
N2 - High-strength concretes enable filigree concrete structures which are prone to cyclic loading. Regarding the design of concrete structures under compressive fatigue loading, the fatigue resistance is increasingly reduced for higher concrete strengths in guidelines and standards, such as Model Code 2020 or Eurocode 2, accounting for the fear of increased fatigue sensitivity with increasing strength and brittleness of the concrete. This reduces their potential dramatically in fatigue-loaded structures. The discussion concerning the influence of the concrete strength on the fatigue resistance has been ongoing for decades. Controversial results are documented in the literature. However, several results show that concretes with higher strengths do not have a reduced fatigue resistance. Nevertheless, the strength-dependent reduction of the concrete’s fatigue resistance is still included in standards and guidelines. The influence of the concrete strength on the fatigue resistance has been investigated for several years within different projects at the Institute of Building Materials Science, Leibniz University of Hannover. Accordingly, concretes of different strengths have been investigated. Furthermore, our own test data and around 2,100 data points available in literature were analysed together to fundamentally answer the question of whether highstrength concretes have a reduced fatigue resistance. Data from our own tests are shown comparatively and the results of the overall analyses of data from literature are presented and discussed in this paper. Altogether, a clear result was obtained: The fatigue resistance of concrete does not decrease with increasing concrete strength. Thus, the design regulations have to be approved to significantly increase the potential of high-strength concrete in fatigue-loaded structures.
AB - High-strength concretes enable filigree concrete structures which are prone to cyclic loading. Regarding the design of concrete structures under compressive fatigue loading, the fatigue resistance is increasingly reduced for higher concrete strengths in guidelines and standards, such as Model Code 2020 or Eurocode 2, accounting for the fear of increased fatigue sensitivity with increasing strength and brittleness of the concrete. This reduces their potential dramatically in fatigue-loaded structures. The discussion concerning the influence of the concrete strength on the fatigue resistance has been ongoing for decades. Controversial results are documented in the literature. However, several results show that concretes with higher strengths do not have a reduced fatigue resistance. Nevertheless, the strength-dependent reduction of the concrete’s fatigue resistance is still included in standards and guidelines. The influence of the concrete strength on the fatigue resistance has been investigated for several years within different projects at the Institute of Building Materials Science, Leibniz University of Hannover. Accordingly, concretes of different strengths have been investigated. Furthermore, our own test data and around 2,100 data points available in literature were analysed together to fundamentally answer the question of whether highstrength concretes have a reduced fatigue resistance. Data from our own tests are shown comparatively and the results of the overall analyses of data from literature are presented and discussed in this paper. Altogether, a clear result was obtained: The fatigue resistance of concrete does not decrease with increasing concrete strength. Thus, the design regulations have to be approved to significantly increase the potential of high-strength concrete in fatigue-loaded structures.
KW - Concrete strength
KW - Cyclic compression
KW - Fatigue resistance
KW - HPC
KW - Numbers of cycles to failure
KW - UHPC
UR - http://www.scopus.com/inward/record.url?scp=85216928504&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85216928504
SN - 9782940643257
T3 - fib Symposium
SP - 215
EP - 222
BT - ReConStruct
A2 - Henry, Richard S.
A2 - Palermo, Alessandro
PB - fib. The International Federation for Structural Concrete
T2 - 20th fib Symposium on ReConStruct: Resilient Concrete Structures, 2024
Y2 - 11 November 2024 through 13 November 2024
ER -