Comparative Study of Seismic Performance and Cost Efficiency of Steel vs Concrete Moment-Resisting Frames in a Six-Story Building in Maluku

Abstract

Indonesia is one of the countries located within the Pacific Ring of Fire, making it highly susceptible to earthquakes. In the construction of buildings, especially those at high-risk areas, an effective seismic-resistant structure is essential to minimize damage and ensure the safety of occupants. One such region is Maluku, where buildings require careful structural planning. A commonly used structural system in these cases is the Moment Resisting Frame (MRF), which can be built using either steel or concrete. This study aims to evaluate and compare the seismic performance and cost efficiency of steel and concrete Moment-Resisting Frames applied to a six-story building in Maluku. The methodology involves modeling the building structure using ETABS v22 structural analysis software. A pushover analysis was conducted to assess seismic performance based on inter-story drift and structural capacity and cost efficiency was evaluated by comparing material volumes and prices. The results show that the maximum story drift for the steel MRF is 45.694 mm in the X direction and 54.654 mm in the Y direction. For the concrete MRF, the maximum story drift is 51.233 mm in the X direction and 47.977 mm in the Y direction. These results indicate that between steel and concrete MRF systems have their respective advantages. Steel MRFs offer better flexibility and drift performance in certain directions, while concrete MRFs may provide better performance in others and the cost analysis is calculated based on the cost of material usage. This study serves as a reference for engineers and decision-makers in selecting efficient structural systems for earthquake-resistant buildings.