STRUCTURAL MODIFICATION USING A DUAL SYSTEM AT THE ASIAN BEARINDO JAYA BUILDING IN SURABAYA, DESIGNED FOR HIGH-INTENSITY EARTHQUAKES

Abstract

High-rise buildings have become increasingly popular in the construction industry as technological and scientific developments continue to advance in Indonesia. Structural planning is a critical aspect in the development of multi-story buildings to ensure safety, strength, and cost efficiency. One of the companies developing a multi-story building in Surabaya is PT. Asian Bearindo Jaya, which utilizes its building as an office facility for bearing production management. The building consists of a five-story reinforced concrete superstructure with a total height of 24.7 meters, originally designed as an open frame system and later modified into a moment-resisting frame system combined with a dual system incorporating shear walls.

Based on the structural analysis conducted using the ETABS application, the design results include a 120-mm-thick reinforced concrete slab; reinforced concrete columns with dimensions of 900×900 mm (K1), 700×700 mm (K2), and 500×500 mm (K3); main reinforced concrete beams with dimensions of 400×700 mm (B1), 300×600 mm (B2), and 300×500 mm (B3); and shear walls with a thickness of 300 mm. The analysis concludes that the reinforced concrete frame system is safe and capable of resisting all applied loads, particularly lateral forces resulting from high-intensity seismic activity.