Lin, H., Hong, W., Yang, Z., Xu, Z., Wang, Y., & Li, B. (2024). Deflection estimation of reinforced concrete beams using long-gauge optic sensors. Structures, 69, 107249. https://doi.org/10.1016/j.istruc.2024.107249
Abstract:
Deflection is a crucial indicator in structural health monitoring, directly impacting the service life, safety, and
economic viability of structures. However, current indirect methods for measuring deflection often have limitations. While they may be suitable for flexure dominated reinforced concrete (RC) specimens, they often neglect the significant influence of nonlinearity and shear deformation. This paper introduces a new approach for estimating the deflection of reinforced concrete (RC) beams using distributed long gauge optic sensors. The method tackles the limitations of current methods by incorporating the crucial factors of shear deformation, neutral axis position variation and shear stiffness degradation. Experimental results demonstrate the good performance of long gauge optic sensors in measuring shear deformation and vertical deflection of RC beams. Moreover, a decoupling method for flexural and shear deformation is also proposed. The method offers a preliminary assessment of the reinforced concrete (RC) beam type by quantifying the relative significance of shear deformation.
License type:
Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
Funding Info:
This research / project is supported by the NRF, MND - under its Cities of Tomorrow R&D Programme
Grant Reference no. : CoT Award COT V2 2020 2