Performance Evaluation of Fluid Viscous Dampers in a 13-Story Reinforced-Concrete Building on Soft Soil in Surabaya

Abstract

Buildings on soft soil are prone to large lateral deformation, so drift control needs to be considered together with its structural and economic consequences. This study examines a 13-story reinforced-concrete building through three ETABS models: an SMRF with shear walls, an OMRF open frame, and an OMRF fitted with fluid viscous dampers (FVDs). Response-spectrum analysis followed SNI 1726:2019. The selected scheme used 14 linear FVDs, reducing maximum deformation from 442.02 mm to 315.62 mm and bringing the maximum interstory drift back within the adopted limit. Quantity take-offs showed reductions of 8.83%, 24.10%, 19.30%, and 42.08% in slab, beam, column, and pilecap reinforcement, while the number of piles fell by 45.09%. All connection demand-to-capacity ratios remained below 1.0, although tensile concrete breakout was critical at 0.97. Material cost rose from IDR 8.49 billion to IDR 38.44 billion because FVD procurement dominated the alternative.