Calculation of Steel Stresses in Cracked Reinforced Rectangular Concrete Elements Loaded in Bending

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

1 Citaat (Scopus)

Samenvatting

An accurate calculation of steel stresses is essential for assessing reinforced concrete structures’ serviceability limit state, e.g., assessing crack widths. The steel stresses in elements loaded in bending are not known but are estimated by steel stress calculations. To get a more accurate crack width prediction, the calculated steel stress should approximately represent the actual steel stress at the location of the crack after the crack has been formed. Existing methods for calculating steel stresses are frequently based on numerous assumptions; e.g., the tensile stresses or tension softening effects in the cross-section are neglected, and a linear stress-strain distribution is assumed for the concrete in compression. This paper presents a method to calculate steel stresses based on existing constitutive theoretical relations that consider concrete's non-linear behaviour in compression and tension. They are compared with strain measurements of the reinforcement bars using distributed optical fiber sensors obtained from experiments described in the literature. Results showed that existing methods frequently overestimated the steel stress, especially when the first cracks were formed. Therefore, a method was developed for an improved calculation of steel stresses in elements loaded in bending with a rectangular cross-section. The paper demonstrated that the developed method could estimate steel stresses more accurately from the first to the final crack. The presented method applies to rectangular cross-sections with a single reinforcement layer but can be straightforwardly extended to other shapes in a similar procedure and can be used to assess the accuracy of crack width formulations based on experimental results.

Originele taal-2Engels
TitelInternational RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures
RedacteurenAgnieszka Jędrzejewska, Fragkoulis Kanavaris, Miguel Azenha, Farid Benboudjema, Dirk Schlicke
Plaats van productieSwitzerland
UitgeverijSpringer
Pagina's1047-1058
Aantal pagina's12
Volume1
ISBN van elektronische versie978-3-031-33211-1
ISBN van geprinte versie978-3-031-33210-4
DOI's
StatusGepubliceerd - 11 jun. 2023
EvenementInternational RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, SynerCrete’23 - Milos, Griekenland
Duur: 14 jun. 202316 jun. 2023

Publicatie series

NaamRILEM Bookseries
Volume43
ISSN van geprinte versie2211-0844
ISSN van elektronische versie2211-0852

Congres

CongresInternational RILEM Conference on Synergising Expertise towards Sustainability and Robustness of Cement-based Materials and Concrete Structures, SynerCrete’23
Land/RegioGriekenland
StadMilos
Periode14/06/2316/06/23

Bibliografische nota

Funding Information:
The authors thank Rijkswaterstaat Grote Projecten en Onderhoud (GPO) for their financial support and valuable feedback while writing this paper. The support of Carlos G. Berrocal for the provision of data and explanation is much appreciated.

Publisher Copyright:
© 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Vingerafdruk

Duik in de onderzoeksthema's van 'Calculation of Steel Stresses in Cracked Reinforced Rectangular Concrete Elements Loaded in Bending'. Samen vormen ze een unieke vingerafdruk.

Citeer dit