Compression tests with confinement for advanced modeling of concrete columns
Motivation
The robotic line enables the production of a spiral reinforcement. Innovative multi-spiral reinforcement can be used in both rounded and rectilinear cross-sections. The typical applications are precast columns subject to high loading and/or seismicity. To realistically describe the behavior of such columns, a 3D nonlinear analysis is required. Prior to this analysis it is necessary to calibrate the constitutive law of the confined concrete. This project analyzes and compares three different experimental setups with transverse confinement, two passive and and one active. In all three cases, the parameters of the selected material model will be identified in the Bayesian statistical framework allowing for quantification of the information content in particular experiments. The goal of the project is to compare the advantages and drawbacks of particular experiments with respect to calibration of constitutive law of confined concrete. The validation of the material model with its identified parameters will be done on the experimental data of precast columns analyzed at the NTU in Taipei.
Project objectives
The project goals comprise
- design of three different setups for testing of confined concrete
- parameters identification of Grassl-Jirásek material model
- validation of the material model on a large-scale experiment of precast column
Project outputs
Journal papers
Conference papers
- M. Lepš, P. Havlásek: Optimum Performance of Axially Compressed Concrete Columns with Multi-spiral Reinforcement. In: Concrete Structures: New Trends for Eco-Efficiency and Performance - Proceedings of the fib Symposium 2021 held online from Lisbon, Portugal, 14-16 June 2021.
- P. Havlásek: Confinement Effectiveness Factor for Columns with Circular Cross-section: Design Codes vs. Numerical Modeling. In: Concrete Structures: New Trends for Eco-Efficiency and Performance - Proceedings of the fib Symposium 2021 held online from Lisbon, Portugal, 14-16 June 2021.
- P. Havlásek, M. Lepš, Z. Bittnar: Optimum design of axially compressed concrete columns with multi-spiral reinforcement. In: Special Concrete and Composites 2020.
- P. Havlásek, L. Dohnalová, P. Bittnar, P. Padevět, M. Jirásek, and Z. Bittnar: Robust and inexpensive test on passively confined concrete for efficient design of concrete structures. In: Special Concrete and Composites 2020.
Experimental database