Studi Analisis Perbandingan Struktur Gable Frame Menggunakan Profil Baja I Non-Prismatis (Tapered) dengan Konfigurasi Variasi Jarak Kolom terhadap Berat Material Bangunan

Abstract

In seismically active regions like Indonesia, steel is the preferred material for wide- span industrial buildings due to its quality, ductility, and efficiency in resisting earthquake forces. The gable roof frame structure, commonly used for spans of 20- 40 meters, employs non-prismatic sections to reduce material use and costs. This study examines the optimization of column spacing in such structures, a key factor affecting cost, space efficiency, and structural strength. Three models with column spacings of 6m, 8m, and 10m were analyzed using ETABS software, evaluating performance under gravity, wind, and earthquake loads. The study assessed material usage and deflection behavior, finding that all models were deemed safe based on structural analysis. Model 2 with an 8-meter column spacing used the least material, amounting to 1248.7 kN (127.34 tons), 32.28% less than Model 1 (1651.9 kN or 168.45 tons) and 2.33% less than Model 3 (1277.9 kN or 130.32 tons). However, Model 3 with a 10-meter column spacing exhibited the smallest vertical and horizontal deflections, indicating superior structural performance.