Studi Efektivitas dan Redundansi Sistem Struktur Penahan Lateral Ganda dengan Variabel Konfigurasi Struktur Berdasarkan Desain Seismik Berbasis Kinerja terhadap Analisis Dinamik Nonliner = Effectiveness and Redundancy of Dual Lateral Resisting System with Structure Configuration Variation Based on Nonlinear Dynamic Analysis Performance Based Seismic Design through Nonlinear Dynamic Analysis.