Experimental Investigation of the Effect of Filled Steel Tubular with Various Sand Grains Diameters on the Buckling Behavior. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), [S. l.], v. 43, n. 2, p. 324–347, 2021. DOI: 10.55562/jrucs.v43i2.156. Disponível em: https://jrucs.iq/index.php/JAUCS/article/view/156. Acesso em: 29 aug. 2026.