Recalibration of a plastic-fracturing model for concrete confinement

✍ Scribed by Bin Chen; S.T. Mau

• Publisher: Elsevier Science
• Year: 1989
• Tongue: English
• Weight: 563 KB
• Volume: 19
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(89)90074-4

✦ Synopsis

In an effort to simulate the concrete behavior in a column using the finite element method, it is found that the plastic-fracturing model originally developed by Bazant and Kim needs to be recalibrated for the kind of general stress conditions characteristic of concrete under confining stresses.

The form of the five characteristic functions of the model is changed, resulting in a total of 24 parameters to be calibrated instead of the original 26. Test results on uniaxial, biaxial, and triaxial behavior of concrete available in the literature are used to calibrate the parameters. The recalibrated model is then used to simulate the behavior of spirally reinforced circular concrete columns under axial compression. Comparisons of the simulated results with those from recently reported tests indicate good agreement.