A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improving structural reliability of FRP bridges by inserting fibre optic sensors
Bridge decks out of pultruded fibre reinforced polymers (FRP) are a promising new option for the construction of road bridges. The highly corrosion resistant material is reducing maintenance costs and traffic interference due to construction and use. The advantages of FRP decks have been successfully proved with the "Friedberg Bridge" in Germany 2008. Though, the lack of long-term experience with the new construction material and the complexity of the material design are still obstacles for a widely use of FRP. Therefore, a new approach of structurally integrated monitoring is proposed to compete with these disadvantages. Through continuous monitoring both structural safe design and an economic construction can be achieved. The integration of fibre optic sensors (FOS) in the adhesive layer between the steel girders and the FRP deck has been successfully performed at the "Friedberg Bridge". With truck load tests the load transfer within the superstructure has been investigated, the results will be presented in this paper. The next step of development is the integration of fibre optic sensors directly into the FRP element during pultrusion. Due to the fully automated production of the FRP bars several fibre optic sensors can be routinely embedded into the material. So, continuous control of elongation in longitudinal and transverse direction and of temperature is possible for every produced structural element. The development of the proposed smart FRP sections is being described in this paper. Next to the production technique the sophisticated lay-out of sensor network and the computation of the measurement results are investigated.
Improving structural reliability of FRP bridges by inserting fibre optic sensors
Bridge decks out of pultruded fibre reinforced polymers (FRP) are a promising new option for the construction of road bridges. The highly corrosion resistant material is reducing maintenance costs and traffic interference due to construction and use. The advantages of FRP decks have been successfully proved with the "Friedberg Bridge" in Germany 2008. Though, the lack of long-term experience with the new construction material and the complexity of the material design are still obstacles for a widely use of FRP. Therefore, a new approach of structurally integrated monitoring is proposed to compete with these disadvantages. Through continuous monitoring both structural safe design and an economic construction can be achieved. The integration of fibre optic sensors (FOS) in the adhesive layer between the steel girders and the FRP deck has been successfully performed at the "Friedberg Bridge". With truck load tests the load transfer within the superstructure has been investigated, the results will be presented in this paper. The next step of development is the integration of fibre optic sensors directly into the FRP element during pultrusion. Due to the fully automated production of the FRP bars several fibre optic sensors can be routinely embedded into the material. So, continuous control of elongation in longitudinal and transverse direction and of temperature is possible for every produced structural element. The development of the proposed smart FRP sections is being described in this paper. Next to the production technique the sophisticated lay-out of sensor network and the computation of the measurement results are investigated.
Improving structural reliability of FRP bridges by inserting fibre optic sensors
Gabler, Markus (author) / Knippers, Jan (author)
2011
10 Seiten, 10 Bilder, 5 Quellen
Conference paper
English
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