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. 2021 Aug 21;21(16):5633. doi: 10.3390/s21165633

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Distribution of the tensile and compressive strain obtained by carrying out four-point bending tests on the reinforced concrete beam specimen embedding smart cement-based sensors (where $ϵ_{c, \inf}$ and $ϵ_{c, \sup}$ are the tensile and compressive strain within a considered section of the beam, respectively): (a) Load case B, applied load P $_{1}$ = 2 kN; (b) load case B, applied load P $_{2}$ = 3 kN.