Pouria Chavoshani , Ebrahim Khalilzadeh Vahidi 2021. Evaluation of Different States of Progressive Failure in Steel Structures with Special Ductility . Turkish Journal of Computer and Mathematics Education (TURCOMAT). 12, 13 (Oct. 2021), 7645 –. DOI:https://doi.org/10.17762/turcomat.v12i13.11136.