Losses for pretensioned precast beams

Authors

  • João de Oliveira Dorta Filho State University of Maringa (UEM), Maringa, PR, Brazil
  • Rafael Alves de Souza State University of Maringa (UEM), Maringa, PR, Brazil https://orcid.org/0000-0002-9990-2850

DOI:

https://doi.org/10.5216/reec.v20i1.62285

Keywords:

Prestressed concrete, Prestress losses, Precast, Prestress, Pretensioning

Abstract

Among the parameters that interfere in the design of the prestressed beams, losses are the most important factor for optimization and economy. However, due to an iterative and repetitive process, its calculation becomes impracticable if carried out manually, requiring professionals to adopt estimated values frequently used during the stage of design. Based on the values proposed by Pfeil (1984), this paper aims at investigating the prestress losses of pretensioned precast beams simply supported considering different concrete strengths, guiding structural engineers with the values of prestressing losses when manual calculations are performed. The obtained results show that the usual predictions are close to that one calculated with the aid of computational package software.

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Author Biographies

João de Oliveira Dorta Filho, State University of Maringa (UEM), Maringa, PR, Brazil

Civil Engineer, Master in Structural Engineering from the State University of Maringá (UEM), Maringá, PR, Brazil

Rafael Alves de Souza, State University of Maringa (UEM), Maringa, PR, Brazil

Civil Engineer, PhD in Structural Engineering from the Polytechnic School of the University of São Paulo (USP), Full Professor of the Department of Civil Engineering at the State University of Maringá (UEM), Maringá, PR, Brazil

References

ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. NBR 6118:2014. Projeto de estruturas de concreto – procedimento. Rio de Janeiro, ABNT, 2014, 238p.

BUCHAIM, R. Concreto Protendido – Tração axial, flexão simples e Força cortante, Editora EDUEL, 2007, 221p.

COLLINS, M.P; MITCHELL, D. Prestressed Concrete Structures, Response Publications, Canada, 1997, 393p.

DORTA FILHO, J. O. Pré-Calc: Dimensionamento Automático de Vigas Pré-Fabricadas com Protensão Aderente - Programa Pré-Calc, 2020.

GUO, T.; CHEN, Z. Monitoring and analysis of long-term prestress losses in post-tensioned concrete beam. Key Laboratory of Concrete and Prestressed Concrete Structure, School of Civil Engineering, Southeast University, China, 2017, 10p.

PFEIL, W. Concreto Protendido. Vol. 2. Rio de janeiro: Livros Técnicos e Científicos, 1984.

PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS. The importance of understanding computer analyses in civil engineering, Institution of Civil Engineers Publishing, 2013, pages 137-143.

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Published

2024-09-16

How to Cite

DE OLIVEIRA DORTA FILHO, J.; ALVES DE SOUZA, R. Losses for pretensioned precast beams. REEC - Revista Eletrônica de Engenharia Civil, Goiânia, v. 20, n. 1, p. 80–93, 2024. DOI: 10.5216/reec.v20i1.62285. Disponível em: https://revistas.ufg.br/reec/article/view/62285. Acesso em: 20 dec. 2024.

Issue

Vol. 20 No. 1 (2024): [REEC] Revista Eletrônica de Engenharia Civil - Vol. 20, n° 1, 2024

Section

Estruturas

License

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