Two-dimensional strain field analysis of reinforced concrete D-regions based on distributed optical fibre sensors
Journal article, 2023

The introduction of Distributed Optical Fibre Sensing in experimental testing of reinforced concrete structures has enabled the acquisition of measurements with an unparalleled level of detail, providing an accurate and ubiquitous description of cracking and deflections throughout an element. However, most of the available research using this technology has focused on the study of beam specimens and high quality data for the calibration and development of models that can describe accurately the behaviour of D-regions in service is still lacking. For that reason, the application of distributed optical fibre sensing in D-regions remains a subject of interest. In this work a method for the deployment of fibre sensors in a multilayer configuration is presented for a wall element. An interpolation approach is then proposed, which combined with the distributed nature of the sensors enabled the description of detailed heat maps for the global and principal strain fields. The results indicated that shear strains can reveal the position of shear cracks well before they are formed whereas the maximum and minimum principal strains clearly show the crack pattern and crack development as well as the load transfer mechanisms including, for the first time, the experimental identification of a secondary strut-and-tie mechanisms.

Distributed Optic Fiber Sensing (DOFS)

Principal strains

Concrete

Author

Ignasi Fernandez

Chalmers, Architecture and Civil Engineering, Structural Engineering

Carlos Gil Berrocal

Thomas Concrete Group

Chalmers, Architecture and Civil Engineering, Structural Engineering

Rasmus Rempling

Chalmers, Architecture and Civil Engineering, Structural Engineering

NCC AB

Engineering Structures

0141-0296 (ISSN) 1873-7323 (eISSN)

Vol. 278 115562

Collaborative Augmented Reality for increased efficiency and interactivity of infrastructure maintenance and inspection

Formas (2019-01793), 2019-12-01 -- 2020-11-30.

Subject Categories

Applied Mechanics

Other Materials Engineering

Composite Science and Engineering

DOI

10.1016/j.engstruct.2022.115562

Related datasets

Two-dimensional strain field data from Distributed Optical Fibre Sensors in a wall element [dataset]

DOI: 10.5878/r6t3-5w03 ID: 2022-121

More information

Latest update

4/24/2023