Finite element modeling of concrete confined with circular thin-walled steel sheet Ashando Hario Yudhanto, Bambang Piscesa, Mario M. Attard, Budi Suswanto and Priyo Suprobo E3S Web Conf., 156 (2020) 05009 Published online: 13 March 2020 DOI: 10.1051/e3sconf/202015605009