TY - JOUR TI - The effect of eccentricity and asymmetry in the plan on the performance level in existing steel buildings with a medium bending frame AU - NEZAMISAVOJBALAGHI, K. JO - Sigma Journal of Engineering and Natural Sciences PY - 2026 VL - 44 SP - 83 EP - 92 DO - 10.14744/sigma.2026.1969 ER -