Perbandingan Respon Struktur Bangunan dengan Sistem Post-Tensioned Flat Slab dan Sistem Ganda Dinding Geser Beton Dengan Rangka Pemikul Momen Khusus terhadap Beban Gempa pada Bangunan Hotel 8 Lantai = Comparison of Building Structural Response with Post-Tensioned Flat Slab System and Dual System of Concrete Shear Walls with Special Moment Resisting Frame to Earthquake Loads in an 8-Story Hotel Building