Parametric analysis of serviceability limit state verifications in reinforced concrete elements subjected to bending
- 1 Universidad de Alicante (España).
- Antolín Lorenzana Ibán (coord.)
- Luisa María Gil Martín (coord.)
- Enrique Hernández Montes (coord.)
- Margarita Cámara Pérez (coord.)
- Víctor Compán Cardiel (coord.)
- Andrés Sáez Pérez (coord.)
Publisher: Universidad de Valladolid
ISBN: 978-84-19214-15-7
Year of publication: 2022
Pages: 409-428
Congress: International Conference on Mechanical Models in Structural Engineering (6. 2021. Valladolid)
Type: Conference paper
Abstract
This study is focused on the serviceability limit states (SLS) of stress limitation, cracking control and deflections of reinforced concrete (RC) beams. An initial case study is presented, in which a RC continuous beam exhibits excessive compressive stress in the concrete whilst complying with the other two SLS's and the ultimate limit state (ULS) design of reinforcement. Consequently, a massive parametric analysis of over 1,4 million RC beams was undertaken in MATLAB. More than 84% of the cases did not verify the concrete compressive stress limitation. A closer look at these problematic situations would show that a great number of them correspond to RC structures with a low strength grade concrete, manufactured with aggregate of higher quality and whose ULS design was based on a linear analysis with limited redistribution of moments. Furthermore, the excessive compressive stress in service compromises the long-term behaviour owing to the non-linear creep of concrete.