Simplified formulation to evaluate forces due to shrinkage in composite steel-concrete beams with full shear connection

  • Nacer Rahal Mustapha Stambouli University, Department of Civil Engineering, Mascara, People's Democratic Republic of Algeria; University of Sciences and Technology, Laboratory of Mechanical Structure and Construction Stability, Oran, People's Democratic Republic of Algeria https://orcid.org/0009-0002-0400-8360
  • Houda Beghdad Mustapha Stambouli University, Department of Civil Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0001-3548-5138
  • Abdelaziz Souici Mustapha Stambouli University, Department of Civil Engineering, Mascaral; University of Sciences and Technology, Laboratory of Mechanical Structure and Construction Stability, Oran, People's Democratic Republic of Algeria https://orcid.org/0009-0004-3845-7409
  • Sara Zatir University Tahri Mohamed of Bechar, Architecture and Urban Department, Bechar, People's Democratic Republic of Algeria https://orcid.org/0000-0002-6187-3441
  • Khaled Benmahdi Mustapha Stambouli University, Department of Civil Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0000-0002-8244-5817
  • Halima Aouad Mustapha Stambouli University, Department of Civil Engineering, Mascara, People's Democratic Republic of Algeria https://orcid.org/0009-0004-1999-1489
DOI: https://doi.org/10.5937/vojtehg72-46499
Keywords: shrinkage, concrete, steel, time, simplified approach

Abstract


Introduction/purpose: It has been known for a very long time that time-dependent effects such as creep and shrinkage of concrete considerably influence the behavior of composite steel-concrete beams. It is therefore very important to take these effects into account when calculating the strength and safety of composite steel-concrete beams. To this end, many theoretical and numerical research studies have been established to control this phenomenon. Most of this research presents laborious processes and calculations requiring complex techniques. 

Methods: This model consists of combining the static equilibrium equations and the two compatibility relations, in curvature and in deformation, of the composite steel-concrete cross-section with the differential equation resulting from the creep rate theory (RCM). The idea of this work was to take this model and simplify it to avoid difficult mathematical transformations. 

Results: The results from this simplified approach are very satisfactory when compared to those given by the analytical model.

Conclusion: To overcome an excessive number of calculations and various difficulties associated with analytical or numerical methods to estimate additional stresses brought by the shrinkage of concrete in composite steel-concrete beams, a simplified analytical methodology has been proposed here while ensuring desired safety. This work has tried to simplify an existing analytical model based on the theory of linear viscoelasticity established in 2012.

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Published
2024/06/10
Issue
Vol. 72 No. 2 (2024): April-June
Section
Review Papers

Copyright (c) 2024 Nacer Rahal, Houda Beghdad, Abdelaziz Souici, Sara Zatir, Khaled Benmahdi, Halima Aouad

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