Modification of existing shape factor models for self-compacting concrete strength by means of Bayesian updating techniques

作者：Van der Vurst Farid^*; Caspeele Robby; Desnerck Pieter; De Schutter Geert; Peirs Jonathan

来源：Materials and Structures, 2015, 48(4): 1163-1176.

DOI：10.1617/s11527-013-0222-2

• Self-compacting concrete
• Uniaxial compression
• Shape factor
• Bayesian updating techniques
• Markov chain Monte Carlo simulations
• Conversion factor

In this paper, the existing formulas for the shape factors for uniaxial compressive strength of vibrated concrete, in which the influence of the shape, size and damage due to drilling has been included, are adapted for powder-type self-compacting concrete. An extensive test program was executed and Bayesian updating techniques were applied in order to calculate posterior distributions of the parameters involved in the conversion formulas for shape factors. Using this method, differences between the shape factor formulas of vibrated and self-compacting concrete could be analysed despite the large variability in the experimentally obtained test results. The methodology developed in this paper for the Bayesian updating of shape factor formulas can also be applied to other material properties of self-compacting concrete and even other materials, especially in cases where a limited number of samples are available or in cases where a considerable variability in the test data is observed.

• 出版日期2015-4