TY - GEN

T1 - Prestressed FRP-strengthening and wireless monitoring of a metallic bridge in Australia

AU - Ghafoori, Elya S.

AU - Hosseini, Ardalan

AU - Al-Mahaidi, Riadh

AU - Zhao, Xiao Ling

AU - Motavalli, Masoud

AU - Koay, Yew Chin

N1 - Funding Information: The authors gratefully acknowledge the financial supports 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. Thanks also go to Marko Horvat and Jon-Paul Marrow from Aeramix Company, Martin Hüppi from S&P AG, Hai Luong from VicRoads, Sanjeet Chan-dra and Alaa Al-Mosawe from Swinburne University of Technology and Herb Kuhn from Simpson Strong-Tie for their exceptional help and cooperation during the installation of the system on the bridge. The authors would also like to thank Slavko Tudor, Robert Widmann and Dimitri Ott from Empa for their supports and help in development, testing and shipment of the retrofit system. Publisher Copyright: © 2018 Taylor & Francis Group, London, UK.

PY - 2018

Y1 - 2018

N2 - This paper presents the first application of pre-stressed carbon fibre-reinforced polymer (CFRP) material for strengthening of a metallic bridge in Australia. The study also describes the application of a wireless sensor network (WSN) system for long-term structural health monitoring (SHM) of the installed retrofit system. A flat pre-stressed un-bonded reinforcement (FPUR) system was developed to apply prestressed CFRP strips to the steel girders of Diamond-Creek Bridge. The bridge is a 121-year-old metallic roadway bridge in Melbourne, which is subjected to daily passenger and heavy truck vehicles. Sets of laboratory tests were performed to examine the efficiency of the proposed FPUR system, prior to its installation on the bridge. Furthermore, in order to demonstrate the efficiency of the proposed retrofit technique, the bridge was instrumented with different types of sensors (including strain gauges, temperature and humidity sensors) and short-and long-term measurements were performed. As for short-term measurements, the bridge was loaded by a 42.5-tonnes semi-trailer before and after strengthening. For the long-term monitoring, a WSN system was used to monitor the prestress level in the CFRP reinforcements for at least one year. The CFRP plates were pre-stressed up to about 980 MPa (≈38% of the CFRP ultimate strength), which resulted in about 50% reduction in the maximum tensile stress in the bridge girders. The results of the short-and long-term measurements in this study showed that the FPUR system was very effective for flexural and fatigue strengthening of the bridge girders.

AB - This paper presents the first application of pre-stressed carbon fibre-reinforced polymer (CFRP) material for strengthening of a metallic bridge in Australia. The study also describes the application of a wireless sensor network (WSN) system for long-term structural health monitoring (SHM) of the installed retrofit system. A flat pre-stressed un-bonded reinforcement (FPUR) system was developed to apply prestressed CFRP strips to the steel girders of Diamond-Creek Bridge. The bridge is a 121-year-old metallic roadway bridge in Melbourne, which is subjected to daily passenger and heavy truck vehicles. Sets of laboratory tests were performed to examine the efficiency of the proposed FPUR system, prior to its installation on the bridge. Furthermore, in order to demonstrate the efficiency of the proposed retrofit technique, the bridge was instrumented with different types of sensors (including strain gauges, temperature and humidity sensors) and short-and long-term measurements were performed. As for short-term measurements, the bridge was loaded by a 42.5-tonnes semi-trailer before and after strengthening. For the long-term monitoring, a WSN system was used to monitor the prestress level in the CFRP reinforcements for at least one year. The CFRP plates were pre-stressed up to about 980 MPa (≈38% of the CFRP ultimate strength), which resulted in about 50% reduction in the maximum tensile stress in the bridge girders. The results of the short-and long-term measurements in this study showed that the FPUR system was very effective for flexural and fatigue strengthening of the bridge girders.

UR - http://www.scopus.com/inward/record.url?scp=85067070793&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:85067070793

SN - 9781138730458

T3 - Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018

SP - 472

EP - 480

BT - Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges - Proceedings of the 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018

A2 - Powers, Nigel

A2 - Frangopol, Dan M.

A2 - Al-Mahaidi, Riadh

A2 - Caprani, Colin

T2 - 9th International Conference on Bridge Maintenance, Safety and Management, IABMAS 2018

Y2 - 9 July 2018 through 13 July 2018

ER -