Analysis of Earthquake-Resistant Portal Frame Structures with Ordinary Moment Frames (OMF), Intermediate Moment Frames (IMF), and Special Moment Frames (SMF) based on SNI 1726:2019

Since the 19th century, portal frames have been used to build industrial buildings because development process is fast, economical, and efficient. This research aims look at cross-section of structural elements in BS 5950-1:2000 spans 15 m 40 using SNI 1726:2019 with modal analysis, including horizontal deflection stress ratio, LRFD ASD methods. Then, structure was revised be safe against earthquakes researched three zones, low (OMF), medium (IMF), high (SMF) earthquakes. The results this show that deflection's magnitude still falls within allowable limit, maximum value on Tarutung, SMF system, KDS E a 15-m span 43.828 mm 40-m 68.703 mm. However, several IMF systems' cross-sectional structures exceeded ratio capacity. After revision, percentage ratios weight cross-sections Indonesian market two methods frame systems are 16.050% 17.240%, respectively. obtained exceeds British standard before revision by 13.935% 13.187%. It an system.