Bekasi Regency, West Java, is located in a seismically active region of Indonesia, making seismic performance evaluation important for assessing the safety and reliability of reinforced concrete buildings. This study evaluates the seismic performance of a special dual reinforced concrete structural system using the Nonlinear Static Pushover (NSP) procedure in accordance with ASCE/SEI 41-17. A three-dimensional structural model was developed in ETABS v22, with nonlinear behavior represented using plastic hinges for beams and columns and fiber-based hinges for structural walls. The building response was evaluated under the Design Basis Earthquake (DBE) and Maximum Considered Earthquake (MCE) hazard levels using performance-point response, interstory drift ratios, and plastic hinge development. Under the DBE level, the maximum interstory drift ratios were 0.976% and 0.785% in the X- and Y-directions, respectively, satisfying the 1.0% acceptance limit for the Immediate Occupancy (IO) performance level. Under the MCE level, the maximum drift ratios were 1.776% and 1.265% in the X- and Y-directions, respectively, remaining below the 2.0% acceptance limit for the Life Safety (LS) performance level. Plastic hinge evaluation showed that no structural elements progressed to the LS or Collapse Prevention (CP) levels. The results indicate that the investigated dual structural system provides adequate seismic performance and satisfies the specified acceptance criteria under both hazard levels. Keywords: Seismic performance; Dual reinforced concrete system; Nonlinear static pushover; ASCE/SEI 41-17; Bekasi Regency.
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