Nguyen, M.-C., Le, T.-T.-H., Le, M.-T., Vu, Q.A., Nguyen, N.-T. and Truong, V.-H. 2025. Multi-objective optimization for nonlinear steel frames using a parameter-less MOO algorithm and XGBoost. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE. 19, 2 (Jun. 2025), 48–61. DOI:https://doi.org/10.31814/stce.huce2025-19(2)-04.