A piecewise multi-objective optimization strategy for phase-field model parameters oriented toward the full-curve mechanical response of concrete

June 1, 2026Journal of Hydraulic Engineering

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Key Points

The research aims to develop a systematic optimization strategy for phase-field model parameters of concrete to enhance both model accuracy and computational efficiency.
Quantitative analysis of time step, convergence tolerance, grid size, and length scale ratio.
Development of a piecewise multi-objective optimization framework tailored to the mechanical response of concrete.
Assessment of optimization performance across different algorithms.
All four parameters significantly affected solution efficiency with statistical relevance.
Grid size exhibited notable gradient changes across the elastic, plastic, and softening segments, being crucial for fitting accuracy.
Introducing an auxiliary optimization goal for efficiency increased overall computational performance by over 60% within a 5% accuracy tolerance.

Explores optimization of concrete model parameters, highlighting efficiency and accuracy improvements.

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Qin et al. (2026) studied this question.

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