<p>In this study, displacement obtained by elastic analysis of structure, with concentration factor &nbsp;has become a nonlinear displacement. Also, its amount shall not exceed from the specified limit in design code. Otherwise, by increasing the dimensions of beams, columns or both, the investigation of their effect on reducing displacement has been conducted(Jorge Ruiz et al.,2003). By comparing reduced displacement caused by dimension changing of beams and columns, the optimal case is determined(Jorge Ruiz et al.,2003). One of the most important results in high-rise structures and different number of opening, in both steel and concrete structure, by increasing beam dimensions, lateral displacement of floors is reduced. Also, moody period in steel structures relative to concrete, will be further reduced by increasing sections of columns and beams.</p>