Advanced search
1 file | 1.16 MB

Contemporary analysis and numerical simulation of revisited long-term creep tests on reinforced concrete beams from the Sixties

Tim Van Mullem (UGent) , Nicky Reybrouck (UGent) , Pieterjan Criel (UGent) , Luc Taerwe (UGent) and Robby Caspeele (UGent)
Author
Organization
Abstract
The stresses and deformations in concrete change over time as a result of the creep- and shrinkage deformations of concrete. Different material models are available in literature in order to predict this time-dependent behaviour. These material models mostly have been calibrated on large datasets of creep specimens. In order to verify the accuracy of the contemporary material models with respect to the prediction of the creep behaviour of reinforced concrete beams, a cross-sectional calculation tool which employs the age-adjusted effective modulus has been developed and used to analyse an original set of 4 year-long creep data on reinforced beams from the 1960’s. Six commonly used material models for the prediction of creep and shrinkage are considered in the current investigation: CEB-FIP Model Code 1990–1999, fib Model Code 2010, the model of EN1992-1-1, model B3, the Gardner Lockmann 2000 model, and ACI 209. The data on reinforced beams relates to an experimental investigation in collaboration with six major research institutes in Belgium. From 1967 until 1972 thirty-two reinforced beams with different reinforcement ratios were subjected, up until 4.5 years, to different stress levels in a four point bending configuration with a span of 2.8 m. In this paper a comparison between the measurements and the calculated deflections and strains is reported. Further, the deflections were also predicted using the contemporary creep models in combination with the nonlinear creep correction factor provided in EN1992-1-1, since the maximum concrete stresses in the beams were outside the service stress range of each of the models. Correcting for the nonlinearity of the creep coefficient significantly improves the calculated deflections. The most accurate predictions of the deflections at early age were obtained by the model of fib Model Code 2010. The Gardner Lockmann 2000 model exhibits the highest accuracy with respect to deflections at the end of loading and with respect to the creep rate.

Downloads

  • Contemporary analysis-Tim Van Mullem-Nicky Reybrouck-Pieterjan Criel-Luc Taerwe-Robby Caspeele.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 1.16 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Van Mullem, Tim, Nicky Reybrouck, Pieterjan Criel, Luc Taerwe, and Robby Caspeele. 2017. “Contemporary Analysis and Numerical Simulation of Revisited Long-term Creep Tests on Reinforced Concrete Beams from the Sixties.” In High Tech Concrete : Where Technology and Engineering Meet, ed. DA Hordijk and M Lukovic, 2802–2809. Springer.
APA
Van Mullem, T., Reybrouck, N., Criel, P., Taerwe, L., & Caspeele, R. (2017). Contemporary analysis and numerical simulation of revisited long-term creep tests on reinforced concrete beams from the Sixties. In DA Hordijk & M. Lukovic (Eds.), High Tech Concrete : Where technology and engineering meet (pp. 2802–2809). Presented at the fib Symposium "High Tech Concrete : Where technology and engineering meet, Springer.
Vancouver
1.
Van Mullem T, Reybrouck N, Criel P, Taerwe L, Caspeele R. Contemporary analysis and numerical simulation of revisited long-term creep tests on reinforced concrete beams from the Sixties. In: Hordijk D, Lukovic M, editors. High Tech Concrete : Where technology and engineering meet. Springer; 2017. p. 2802–9.
MLA
Van Mullem, Tim, Nicky Reybrouck, Pieterjan Criel, et al. “Contemporary Analysis and Numerical Simulation of Revisited Long-term Creep Tests on Reinforced Concrete Beams from the Sixties.” High Tech Concrete : Where Technology and Engineering Meet. Ed. DA Hordijk & M Lukovic. Springer, 2017. 2802–2809. Print.
@inproceedings{8523837,
  abstract     = {The stresses and deformations in concrete change over time as a result
of the creep- and shrinkage deformations of concrete. Different material models
are available in literature in order to predict this time-dependent behaviour. These
material models mostly have been calibrated on large datasets of creep specimens.
In order to verify the accuracy of the contemporary material models with
respect to the prediction of the creep behaviour of reinforced concrete beams, a
cross-sectional calculation tool which employs the age-adjusted effective modulus
has been developed and used to analyse an original set of 4 year-long creep
data on reinforced beams from the 1960{\textquoteright}s. Six commonly used material models
for the prediction of creep and shrinkage are considered in the current investigation:
CEB-FIP Model Code 1990--1999, fib Model Code 2010, the model of
EN1992-1-1, model B3, the Gardner Lockmann 2000 model, and ACI 209. The
data on reinforced beams relates to an experimental investigation in collaboration
with six major research institutes in Belgium. From 1967 until 1972 thirty-two
reinforced beams with different reinforcement ratios were subjected, up until 4.5
years, to different stress levels in a four point bending configuration with a span
of 2.8 m. In this paper a comparison between the measurements and the calculated
deflections and strains is reported. Further, the deflections were also predicted
using the contemporary creep models in combination with the nonlinear
creep correction factor provided in EN1992-1-1, since the maximum concrete
stresses in the beams were outside the service stress range of each of the models.
Correcting for the nonlinearity of the creep coefficient significantly improves the
calculated deflections. The most accurate predictions of the deflections at early
age were obtained by the model of fib Model Code 2010. The Gardner Lockmann
2000 model exhibits the highest accuracy with respect to deflections at the end of
loading and with respect to the creep rate.},
  author       = {Van Mullem, Tim and Reybrouck, Nicky and Criel, Pieterjan and Taerwe, Luc and Caspeele, Robby},
  booktitle    = {High Tech Concrete : Where technology and engineering meet},
  editor       = {Hordijk, DA and Lukovic, M},
  isbn         = {978-3-319-59470-5},
  language     = {eng},
  location     = {Maastricht (Nederland)},
  pages        = {2802--2809},
  publisher    = {Springer},
  title        = {Contemporary analysis and numerical simulation of revisited long-term creep tests on reinforced concrete beams from the Sixties},
  url          = {http://dx.doi.org/10.1007/978-3-319-59471-2},
  year         = {2017},
}

Altmetric
View in Altmetric