Details
| Original language | English |
|---|---|
| Article number | 117335 |
| Journal | Engineering Structures |
| Volume | 302 |
| Early online date | 4 Jan 2024 |
| Publication status | Published - 1 Mar 2024 |
Abstract
with different diameters by filling the annulus with grout material. Offshore structures
are considerably subjected to dynamic loading. Hence, the fatigue behaviour of
grouted connections typically used in the different components of these structures is of
particular interest. This study presents a new test concept for cyclic axially loaded
grouted connections with fibre optical sensory integrated into the grout annulus. It aims
to provide insight into the mechanisms of damage initiation and propagation through
real-time crack detection. Specimens have been designed such that they can be
reused in several experiments, thus significantly reducing the time and cost of the test
program. Test results show that the fatigue degradation behaviour of axially loaded
grouted connections can be divided into three different phases according to its
advancement: stable, incremental, and progressive degradation. Certain cracks have
been observed to exert a slight influence on the connections performance. Moreover,
phase changes are not directly characterised by the appearance of cracks but by their
widening progress. The overall test concept including the novel reusable test specimen
and measurement setup is found to be functional. They provide an opportunity to gain
insight into the degradation mechanism of grouted connections under cyclic loading.
Keywords
- Grouted Connections, Fatigue Degradation Mechanism, Fibre Bragg Grating Sensory, Structural Health Monitoring, Structural Integrity, Reusability
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering Structures, Vol. 302, 117335, 01.03.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Innovative test concept for evaluating fatigue degradation process of submerged grouted connections
AU - Borgelt, Jakob Michael
AU - Possekel, Joshua
AU - Schaumann, Peter
AU - Dreger, Dennis
AU - Ghafoori, Elyas
N1 - The research is funded by the German Federal Ministry for Economics and Climate Action (project no. 03SX505B). The author is grateful to PAGEL Spezial-Beton GmbH & Co., KG for providing the grout material used in this study.
PY - 2024/3/1
Y1 - 2024/3/1
N2 - Grouted connections are hybrid joints fabricated by linking two overlapping steel tubeswith different diameters by filling the annulus with grout material. Offshore structuresare considerably subjected to dynamic loading. Hence, the fatigue behaviour ofgrouted connections typically used in the different components of these structures is ofparticular interest. This study presents a new test concept for cyclic axially loadedgrouted connections with fibre optical sensory integrated into the grout annulus. It aimsto provide insight into the mechanisms of damage initiation and propagation throughreal-time crack detection. Specimens have been designed such that they can bereused in several experiments, thus significantly reducing the time and cost of the testprogram. Test results show that the fatigue degradation behaviour of axially loadedgrouted connections can be divided into three different phases according to itsadvancement: stable, incremental, and progressive degradation. Certain cracks havebeen observed to exert a slight influence on the connections performance. Moreover,phase changes are not directly characterised by the appearance of cracks but by theirwidening progress. The overall test concept including the novel reusable test specimenand measurement setup is found to be functional. They provide an opportunity to gaininsight into the degradation mechanism of grouted connections under cyclic loading.
AB - Grouted connections are hybrid joints fabricated by linking two overlapping steel tubeswith different diameters by filling the annulus with grout material. Offshore structuresare considerably subjected to dynamic loading. Hence, the fatigue behaviour ofgrouted connections typically used in the different components of these structures is ofparticular interest. This study presents a new test concept for cyclic axially loadedgrouted connections with fibre optical sensory integrated into the grout annulus. It aimsto provide insight into the mechanisms of damage initiation and propagation throughreal-time crack detection. Specimens have been designed such that they can bereused in several experiments, thus significantly reducing the time and cost of the testprogram. Test results show that the fatigue degradation behaviour of axially loadedgrouted connections can be divided into three different phases according to itsadvancement: stable, incremental, and progressive degradation. Certain cracks havebeen observed to exert a slight influence on the connections performance. Moreover,phase changes are not directly characterised by the appearance of cracks but by theirwidening progress. The overall test concept including the novel reusable test specimenand measurement setup is found to be functional. They provide an opportunity to gaininsight into the degradation mechanism of grouted connections under cyclic loading.
KW - Grouted Connections
KW - Fatigue Degradation Mechanism
KW - Fibre Bragg Grating Sensory
KW - Structural Health Monitoring
KW - Structural Integrity
KW - Reusability
UR - http://www.scopus.com/inward/record.url?scp=85181877872&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2023.117335
DO - 10.1016/j.engstruct.2023.117335
M3 - Article
VL - 302
JO - Engineering Structures
JF - Engineering Structures
SN - 0141-0296
M1 - 117335
ER -