A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Distributed strain measurement in steel slab-on-girder bridge via Brillouin optical time domain reflectometry
Single-mode fiber optic sensors based on spontaneous Brillouin scattering allow to measure distributed strain and temperature profiles along structural members. Measurement is based on the correlation of strain and temperature with the frequency shift of the Brillouin backscattered light induced by a pump light pulse launched into an optical fiber. The technique has significant potential for the structural health monitoring of bridges and, in perspective, of integrated transportation infrastructures. However, very few field applications have demonstrated its feasibility on large-scale structures. This paper presents a pilot application of Brillouin Optical Time Domain Reflectometry (BOTDR) for extensive girder strain measurement during load testing of a 263 m long five-span slab-on-girder bridge. A 1.1 km long optical circuit was installed on the web of four girders at different depths, along up to two continuous spans. The circuit comprises bare optical cables and a custom-made novel glass Fiber Reinforced Polymer (FRP) tape with embedded sensors for strain measurement and thermal compensation. The experimental strain profiles were compared with that of threedimensional finite element analysis, calibrated using discrete deflection measurements of an Automated Total Station (ATS) system, and were shown to accurately describe the bridge response.
Distributed strain measurement in steel slab-on-girder bridge via Brillouin optical time domain reflectometry
Single-mode fiber optic sensors based on spontaneous Brillouin scattering allow to measure distributed strain and temperature profiles along structural members. Measurement is based on the correlation of strain and temperature with the frequency shift of the Brillouin backscattered light induced by a pump light pulse launched into an optical fiber. The technique has significant potential for the structural health monitoring of bridges and, in perspective, of integrated transportation infrastructures. However, very few field applications have demonstrated its feasibility on large-scale structures. This paper presents a pilot application of Brillouin Optical Time Domain Reflectometry (BOTDR) for extensive girder strain measurement during load testing of a 263 m long five-span slab-on-girder bridge. A 1.1 km long optical circuit was installed on the web of four girders at different depths, along up to two continuous spans. The circuit comprises bare optical cables and a custom-made novel glass Fiber Reinforced Polymer (FRP) tape with embedded sensors for strain measurement and thermal compensation. The experimental strain profiles were compared with that of threedimensional finite element analysis, calibrated using discrete deflection measurements of an Automated Total Station (ATS) system, and were shown to accurately describe the bridge response.
Distributed strain measurement in steel slab-on-girder bridge via Brillouin optical time domain reflectometry
Verteilte Dehnungsmessung in Stahlbalkenbrücken mit Plattenaufbau mittels optischer Brillouin Zeitbereichsreflektometrie
Bastianini, F. (author) / Matta, F. (author) / Galati, N. (author) / Nanni, A. (author)
2006
8 Seiten, 7 Bilder, 1 Tabelle, 19 Quellen
Conference paper
Storage medium
English
Thermal Strain Sensing of Concrete Piles Using Brillouin Optical Time Domain Reflectometry
| British Library Online Contents | 2014
Thermal Strain Sensing of Concrete Piles Using Brillouin Optical Time Domain Reflectometry
| Online Contents | 2014
Concrete slab and girder bridge
| Engineering Index Backfile | 1946
Destructive test of a steel slab-on-girder bridge
| British Library Conference Proceedings | 2010