Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Steel and Composite Structures Volume 53, Number 6, December 25 2024 (Special Issue) pages 687-701 DOI: https://doi.org/10.12989/scs.2024.53.6.687 |
|
|
|
Bayesian uncertainty assessment for mechanical properties of steel reinforcing bars in Colombia |
||
Felipe Guerrero, Albert R. Ortiz, Julian Carrillo, Johannio Marulanda and Peter Thomson
|
||
| Abstract | ||
| The variability in the mechanical properties of reinforcing steel bars used in reinforced concrete elements affects the performance of the different structural systems. This variability may lead to struggling to comply with the requirements of local building codes. This study presents and discusses the uncertainty quantification of the mechanical parameters of the stress-strain curve of steel reinforcing bars in Colombia. The database comprised results from experimental programs, including monotonic axial tests on steel bars from different manufacturers in the country. A model was calibrated using the Bayesian estimation framework, and the Monte Carlo Markov Chain method. Bayesian statistical analysis procedures were used to update the Raynor model of the monotonic stress-strain curve of the steel. Distributions for parameters of the steel are then presented and predictive check tests are performed for validation. The Bayesian statistical analysis allowed contrasting the mechanical properties obtained experimentally with nominal properties specified by the manufacturers. The distributions and associated variability for the main mechanical parameters of the rebars are presented and grouped by manufacturer and by bar size. | ||
| Key Words | ||
| Bayesian uncertainty quantification; concrete structures; steel reinforcing; stress-strain curve | ||
| Address | ||
| Felipe Guerrero:School of Civil Engineering and Geomatic, Universidad del Valle, Cali 760032, Colombia Albert R. Ortiz:1)School of Civil Engineering and Geomatic, Universidad del Valle, Cali 760032, Colombia 2)Colombian Earthquake Engineering Research Network, CEER, Colombia Julian Carrillo:1)Colombian Earthquake Engineering Research Network, CEER, Colombia 2)Department of Civil Engineering, Universidad Militar Nueva Granada, Bogotá 110111, Colombia Johannio Marulanda:School of Civil Engineering and Geomatic, Universidad del Valle, Cali 760032, Colombia Peter Thomson:School of Civil Engineering and Geomatic, Universidad del Valle, Cali 760032, Colombia | ||