The lateral stiffness and stability of multi-story buildings in resisting seismic loads are significantly influenced by the presence of shear walls as vertical structural elements. Building plan shape and shear wall layout configuration are determinant factors affecting both the structural seismic performance and the required material volume. This study aims to examine the influence of shear wall layout variations on seismic performance and material efficiency in multi-story buildings with square, L-shaped, and H-shaped floor plans. The analysis was conducted numerically using Autodesk Revit integrated with ETABS, employing the response spectrum method in accordance with SNI 1726:2019. The object of study is a 10-story reinforced concrete apartment building with four configurations: without shear wall, square shear wall, L-shaped shear wall, and core wall. The evaluated parameters include displacement, story drift, natural vibration period, mass participation, and torsional sensitivity, as well as concrete volume and reinforcement weight obtained through a Building Information Modeling (BIM)-based Quantity Take-Off (QTO) approach. The results indicate that the L-shaped shear wall configuration on square and L-shaped plans produced the lowest displacement and story drift values, whereas the core wall configuration exhibited the best seismic performance on the H-shaped plan. In terms of material efficiency, the L-shaped shear wall configuration on the L-shaped plan was found to be the most optimal, requiring a concrete volume of 1,831.84 m³ and a reinforcement weight of 297,620.77 kg. These findings indicate that the appropriate selection of shear wall shape and configuration can significantly reduce the dynamic response of the structure without requiring excessive additional material. This study contributes to the optimization of efficient earthquake-resistant structural design for multi-story buildings, while also supporting the achievement of SDG 9 (Industry, Innovation, and Infrastructure) through the integration of BIM, Revit, and ETABS technologies, and SDG 11 (Sustainable Cities and Communities) through enhanced seismic resilience of multi-story buildings with efficient material usage.

Keywords: shear wall, seismic performance, material efficiency, Quantity Take-Off, ETABS, BIM