Details
| Original language | English |
|---|---|
| Pages (from-to) | 585-605 |
| Number of pages | 21 |
| Journal | Engineering structures |
| Volume | 176 |
| Publication status | Published - 1 Dec 2018 |
| Externally published | Yes |
Abstract
This paper presents an application of prestressed carbon fiber-reinforced polymer (CFRP) plates for the strengthening of metallic girders of a roadway bridge in Melbourne, Australia. The study also describes the application of a wireless sensor network (WSN) system for long-term structural monitoring of the retrofitted bridge girders. A flat prestressed unbonded retrofit (FPUR) system was developed to apply prestressed CFRP plates to the steel girders of the Diamond Creek Bridge (122 years old), which is subjected to daily passenger and heavy vehicles. The first section explains the results of sets of static and fatigue tests performed in the laboratory to examine the efficiency of the proposed FPUR system prior to its installation on the bridge. The second section presents details of different aspects of the CFRP strengthening of the bridge girders, fatigue design criteria, and layouts for short- and long-term monitoring. For the short-term measurements, the bridge was loaded with a 42.5-ton semi-trailer before and after strengthening. The CFRP plates were prestressed up to approximately 980 MPa (≈38% of the CFRP ultimate tensile strength), which resulted in about 50% reduction in the maximum tensile stress in the bridge girders. The third section discusses the development, installation, and preliminary results of the WSN system used to monitor the pre-stress level in the CFRP plates. The results of the short- and long-term measurements in this study show that the FPUR system is very effective for flexural and fatigue strengthening of bridge girders. Finally, a set of recommendations for long-term structural monitoring is provided.
Keywords
- Long-term structural health monitoring (SHM), Metallic bridges, Prestressed CFRP plates, Wireless sensor network (WSN) monitoring
ASJC Scopus subject areas
- Engineering(all)
- Civil and Structural Engineering
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In: Engineering structures, Vol. 176, 01.12.2018, p. 585-605.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Prestressed CFRP-strengthening and long-term wireless monitoring of an old roadway metallic bridge
AU - Ghafoori, Elyas
AU - Hosseini, Ardalan
AU - Al-Mahaidi, Riadh
AU - Zhao, Xiao Ling
AU - Motavalli, Masoud
N1 - Funding Information: The authors gratefully acknowledge the financial support provided by the Australian Research Council (ARC) Linkage Grant ( LP140100543 ), the Swiss National Science Foundation (SNSF Project No. 200021-153609 ) and the S&P Clever Reinforcement Company AG in Switzerland. Publisher Copyright: © 2018 Elsevier Ltd
PY - 2018/12/1
Y1 - 2018/12/1
N2 - This paper presents an application of prestressed carbon fiber-reinforced polymer (CFRP) plates for the strengthening of metallic girders of a roadway bridge in Melbourne, Australia. The study also describes the application of a wireless sensor network (WSN) system for long-term structural monitoring of the retrofitted bridge girders. A flat prestressed unbonded retrofit (FPUR) system was developed to apply prestressed CFRP plates to the steel girders of the Diamond Creek Bridge (122 years old), which is subjected to daily passenger and heavy vehicles. The first section explains the results of sets of static and fatigue tests performed in the laboratory to examine the efficiency of the proposed FPUR system prior to its installation on the bridge. The second section presents details of different aspects of the CFRP strengthening of the bridge girders, fatigue design criteria, and layouts for short- and long-term monitoring. For the short-term measurements, the bridge was loaded with a 42.5-ton semi-trailer before and after strengthening. The CFRP plates were prestressed up to approximately 980 MPa (≈38% of the CFRP ultimate tensile strength), which resulted in about 50% reduction in the maximum tensile stress in the bridge girders. The third section discusses the development, installation, and preliminary results of the WSN system used to monitor the pre-stress level in the CFRP plates. The results of the short- and long-term measurements in this study show that the FPUR system is very effective for flexural and fatigue strengthening of bridge girders. Finally, a set of recommendations for long-term structural monitoring is provided.
AB - This paper presents an application of prestressed carbon fiber-reinforced polymer (CFRP) plates for the strengthening of metallic girders of a roadway bridge in Melbourne, Australia. The study also describes the application of a wireless sensor network (WSN) system for long-term structural monitoring of the retrofitted bridge girders. A flat prestressed unbonded retrofit (FPUR) system was developed to apply prestressed CFRP plates to the steel girders of the Diamond Creek Bridge (122 years old), which is subjected to daily passenger and heavy vehicles. The first section explains the results of sets of static and fatigue tests performed in the laboratory to examine the efficiency of the proposed FPUR system prior to its installation on the bridge. The second section presents details of different aspects of the CFRP strengthening of the bridge girders, fatigue design criteria, and layouts for short- and long-term monitoring. For the short-term measurements, the bridge was loaded with a 42.5-ton semi-trailer before and after strengthening. The CFRP plates were prestressed up to approximately 980 MPa (≈38% of the CFRP ultimate tensile strength), which resulted in about 50% reduction in the maximum tensile stress in the bridge girders. The third section discusses the development, installation, and preliminary results of the WSN system used to monitor the pre-stress level in the CFRP plates. The results of the short- and long-term measurements in this study show that the FPUR system is very effective for flexural and fatigue strengthening of bridge girders. Finally, a set of recommendations for long-term structural monitoring is provided.
KW - Long-term structural health monitoring (SHM)
KW - Metallic bridges
KW - Prestressed CFRP plates
KW - Wireless sensor network (WSN) monitoring
UR - http://www.scopus.com/inward/record.url?scp=85053806774&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2018.09.042
DO - 10.1016/j.engstruct.2018.09.042
M3 - Article
AN - SCOPUS:85053806774
VL - 176
SP - 585
EP - 605
JO - Engineering structures
JF - Engineering structures
SN - 0141-0296
ER -