1. bookVolume 17 (2021): Issue 1 (June 2021)
Journal Details
License
Format
Journal
First Published
30 May 2014
Publication timeframe
2 times per year
Languages
English
access type Open Access

Analysis of Prestressing in Precast Prestressed Concrete Beams

Published Online: 22 Jun 2021
Page range: 184 - 191
Journal Details
License
Format
Journal
First Published
30 May 2014
Publication timeframe
2 times per year
Languages
English
Abstract

Knowledge of prestressing force’s value is in the case of prestressed concrete structure the most important basis for defining load-carrying capacity and remaining service life. Numbers of prestressed concrete structures are about to reach their limit of service life and they are exhibiting signs of deterioration due to the conceptional errors, inadequate maintenance and environmental distress. All of these factors negatively influence the actual state of prestressing. Thus, it is essential to determine the value of prestressing force considering the degradation of materials, such as corrosion of prestressing strands or wires. While assessing structure in service, it is difficult to apply magnetoelastic sensors or use other direct methods for determining the state of prestressing. Hence, the indirect methods enable to analytically calculate the prestressing force based on the results of measurement, e.g. strain, stress, deflection, or width of the crack. The present paper focuses on numerical analysis of prestressing in a twosome of precast prestressed concrete beams. For the numerical analysis, two indirect methods are applied, specifically Saw-cut method and Crack initiation method. Finally, the results are discussed and recommendations for the experimental campaign are summarized.

Keywords

[1] VIČAN, J. – GOCÁL, J. – MELIŠ, B. – KOTEŠ, P. – KOTULA, P.: Real Behaviour and Remaining Lifetime of Bridge Structures. Communications - Scientific Letters of the University of Zilina, 10 (2), 2008, pp. 30-37, Retrieved from, http://komunikacie.uniza.sk/index.php/communications/article/view/1042. Search in Google Scholar

[2] KOTEŠ, P. – VIČAN, J. – NIKOLIČ, R.: Evaluation of Elder and Historical Bridges. 9th International Conference Bridges in Danube Basin 2016, BDB 2016, Procedia Engineering, Vol. 156, 2016, pp. 186-190, https://doi.org/10.1016/j.proeng.2016.08.285. Search in Google Scholar

[3] BUJŇÁKOVÁ, P.: Anchorage System in Old Post-tensioned Precast Bridges. Civil Environ. Eng. Vol. 16, Iss. 2, 2020, pp. 379–387, doi:10.2478/cee-2020-0038. Search in Google Scholar

[4] KOTEŠ, P. – VIČAN, J.: Recommended Reliability Levels for the Evaluation of Existing Bridges According to Eurocodes. Structural Engineering International, Vol. 23, Iss. 4, 2013, pp. 411-417, https://doi.org/10.2749/101686613X13627351081678. Search in Google Scholar

[5] GOCÁL, J. – ODROBIŇÁK, J.: On the Influence of Corrosion on the Load-Carrying Capacity of Old Riveted Bridges. Materials, 2020, 13, 717, https://doi.org/10.3390/ma13030717. Search in Google Scholar

[6] BAGGE, N. – NILIMAA, J. – BLANKSVÄRD, T. – ELFGREN L.: Instrumentation and Full-Scale Test of a Post-Tensioned Concrete Bridge. Nordic Concrete Research, 2014, 51, pp. 63-83. Search in Google Scholar

[7] BAGGE, N. – NILIMAA, J. – ELFGREN, L.: In-situ Methods to Determine Residual Prestress Forces in Concrete Bridges. Engineering Structures, 2017. Search in Google Scholar

[8] FIB, Comité Euro – International du Béton: Strategies for Testing and Assessment of Concrete Structures. Guidance Report. fib Bulletin, No. 243, May 1998. Search in Google Scholar

[9] CIOLKO, A. – TABATABAI, H.: Nondestructive Methods for Condition Evaluation of Prestressing Steel Strands in Concrete Bridges. Structures Congress 2010. NCHRP Web Document 23, Project 10-53, 1999. Search in Google Scholar

[10] HURST, M. K.: Prestressed Concrete Design. Second Edition. E & FN SPON, An Imprint of Routledge London and New York, 1998. Search in Google Scholar

[11] MORAVČÍK, M. – BAHLEDA, F. – JOŠT, J.: Application of Indirect Methods for Determining State of Prestressing in the Structure (in Slovak). Proceedings of the Conference: Concrete Days 2018, November 8-9, 2018. Search in Google Scholar

[12] ČERVENKA, V. – JENDELE, L. – ČERVENKA, J.: ATENA Program Documentation – Part 1. Theory. Prague, January 26, 2018, https://www.cervenka.cz/assets/files/atena-pdf/ATENA_Theory.pdf. Search in Google Scholar

[13] ČERVENKA, V. – ČERVENKA, J.: ATENA Program Documentation – Part 2-1. User’s Manual for ATENA 2D. Prague, May 2015, https://www.cervenka.cz/assets/files/atena-pdf/ATENA-Engineering-2D_Users_manual.pdf. Search in Google Scholar

[14] ČERVENKA, J.: ATENA Program Documentation – Part 4-1. Tutorial for Program ATENA 2D. Prague, June 2, 2015, https://www.cervenka.cz/assets/files/atena-pdf/ATENA-Engineering-2D_Tutorial.pdf. Search in Google Scholar

[15] JANDA, Z. – ČERVENKA, J.: ATENA Program Documentation – Part 4-3. Tutorial for Construction Process Modelling in ATENA 2D. Prague, March 9, 2009, https://www.cervenka.cz/assets/files/atena-pdf/ATENA-Engineering-2D_Tutorial_Construction_Process.pdf. Search in Google Scholar

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