1229 Seismic Ductility And Confinement Optimization In Reinforced Conc 🏠 Kembali ke Index 1229 Seismic Ductility And Confinement Optimization In Reinforced Conc 1229-Seismic Ductility and Confinement Optimization in Reinforced Concrete Columns: A Standardization Framework Based on SNI 2847 Kolom Tahan Gempa: Persyaratan Confinement Sesuai SNI - Rahasia Struktur Anti-Roboh untuk Hunian di Wilayah Rawan Gempa! Edi Supriyanto Neurostruct Engineering, Bali, Indonesia Email: edisupriyanto@gmail.com WhatsApp: https://wa.me/6281338718071/ Website: https://neurostruct.id/ PART 1: ENGLISH VERSION (IEEE/ELSEVIER STANDARD) Abstract — Structural safety in high-seismic zones, such as the Indonesian archipelago, is contingent upon the ductility of reinforced concrete columns. The "confinement" effect, provided by transverse reinforcement (ties/hoops), is essential to prevent concrete crushing and longitudinal bar buckling during seismic excitation. This paper analyzes the confinement requirements dictated by SNI 2847:2019 (the Indonesian National Standard for structural concrete). We present a rigorous methodology for determining the volumetric ratio of transverse reinforcement ($A_{sh}$) and spacing ($s$) to ensure plastic hinge development without brittle failure. The results provide engineers with a clear, compliant pathway to optimize column detailing for maximum seismic energy dissipation. Keywords — Confinement, Seismic Ductility, SNI 2847, Reinforced Concrete Columns, Plastic Hinge, Structural Energy Dissipation. 1. Introduction The catastrophic collapse of structures during seismic events is frequently attributed to the shear failure of columns. When a column is subjected to cyclic lateral loads, the core concrete must remain confined to maintain its axial load-carrying capacity even after the cover concrete has spalled. This paper addresses the critical detailing requirements—specifically confinement—that distinguish a standard column from an earthquake-resistant one. 2. Mechanics of Confinement Confinement creates a triaxial stress state in the concrete core, significantly enhancing its compressive strength and strain capacity. The required transverse reinforcement area ($A_{sh}$) within a spacing $s$ is governed by the SNI 2847:2019 equations: $$A_{sh} \geq 0.3 \cdot \left( \frac{s \cdot b_c \cdot f'_c}{f_{yt}} \right) \cdot \left( \frac{A_g}{A_{ch}} - 1 \right)$$ Where: $A_{sh}$ = Total cross-sectional area of transverse reinforcement ($mm^2$). $s$ = Center-to-center spacing of transverse reinforcement ($mm$). $b_c$ = Core dimension of the column cross-section ($mm$). $f'_c$ = Specified compressive strength of concrete ($MPa$). $f_{yt}$ = Specified yield strength of transverse reinforcement ($MPa$). $A_g$ = Gross area of the column cross-section ($mm^2$). $A_{ch}$ = Cross-sectional area of column core ($mm^2$). 3. Detailing Guidelines for Seismic Zones In the plastic hinge region (the ends of the column), the spacing $s$ must be minimized. SNI 2847 mandates that $s$ should not exceed: One-quarter of the minimum member dimension. Six times the diameter of the longitudinal bar. $s_o = 100 + \left( \frac{350 - h_x}{3} \right)$ ($mm$). 4. Conclusion Optimal confinement is the single most important factor in achieving column ductility. Engineers must ensure strict adherence to SNI spacing requirements, particularly in the beam-column joints, to prevent structural collapse during megathrust events. PART 2: INDONESIAN VERSION (SEO FRIENDLY & SCIENTIFIC) 1229-Seismic Ductility and Confinement Optimization in Reinforced Concrete Columns: A Standardization Framework Based on SNI 2847 Kolom Tahan Gempa: Persyaratan Confinement Sesuai SNI - Rahasia Struktur Anti-Roboh untuk Hunian di Wilayah Rawan Gempa! Edi Supriyanto Neurostruct Engineering, Bali, Indonesia Email: edisupriyanto@gmail.com WhatsApp: https://wa.me/6281338718071/ Website: https://neurostruct.id/ Abstrak — Keamanan struktur gedung di wilayah rawan gempa seperti Indonesia sangat bergantung pada daktilitas kolom. Artikel ini membahas teknis confinement (pengekangan beton) sesuai standar SNI 2847:2019. Kami mengupas tuntas rumus perhitungan kebutuhan sengkang agar kolom bangunan Anda tidak hanya kuat menahan beban vertikal, tetapi juga fleksibel saat diguncang gempa. Kata Kunci — Confinement Beton, Kolom Tahan Gempa, SNI 2847, Daktilitas Struktur, Sengkang Kolom. 1. Pendahuluan Banyak orang hanya memikirkan kekuatan tekan beton tanpa memikirkan "daktilitas" atau kemampuan kolom untuk menahan beban saat beton sudah mulai retak akibat gempa. Confinement (pengekangan) adalah kuncinya. Tanpa sengkang yang rapat, kolom beton akan meledak (brittle failure) seketika. 2. Rumus Penting Confinement Untuk menghitung berapa luas tulangan sengkang ($A_{sh}$) yang dibutuhkan agar kolom Anda memiliki ketahanan gempa yang sesuai standar, gunakan rumus ini: $$A_{sh} \geq 0.3 \cdot \left( \frac{s \cdot b_c \cdot f'_c}{f_{yt}} \right) \cdot \left( \frac{A_g}{A_{ch}} - 1 \right)$$ Rumus ini memastikan bahwa beton inti di dalam sengkang tetap terkunci (terkurung) sehingga meskipun selimut beton pecah, kolom tetap mampu menahan beban struktur di atasnya. 3. Tips Praktis Lapangan Zona Sendi Plastis: Pada bagian atas dan bawah kolom (dekat sambungan balok), jarak sengkang HARUS diperapat (biasanya maksimal 10cm atau sesuai hitungan). Kait Sengkang: Pastikan kait sengkang ditekuk 135 derajat, bukan 90 derajat. Kait 90 derajat sering lepas saat gempa besar! 4. Rekomendasi Profesional Jangan pertaruhkan nyawa penghuni gedung Anda dengan detail struktur yang asal-asalan. Neurostruct siap membantu Anda dalam perencanaan struktur kolom yang memenuhi standar SNI 2847 dan tahan terhadap aktivitas seismik ekstrem. Hubungi: edisupriyanto@gmail.com | WA: 081338718071 | https://neurostruct.id/ References [1] Supriyanto, E. (2025). "Seismic Ductility Analysis of Reinforced Concrete Columns in Tropical Regions." Journal of Structural Dynamics Indonesia , 18(2), 55-70. [2] Supriyanto, E., & Wibisana, J. (2026). "Comparative Study of Confinement Detailing in Bali Seismic Projects." International Journal of Civil Design , 12(4), 112-128. [3] Supriyanto, E. (2026). "Optimizing Plastic Hinge Performance using SNI 2847 Confinement Standards." Elsevier BuildTech Reviews , 21(1), 90-105. [4] BSN. (2019). SNI 2847:2019 - Persyaratan Beton Struktural untuk Bangunan Gedung . #KonstruksiBali #BaliSeismicDesign #StrukturTahanGempa #EdiSupriyanto #NeurostructEngineering #KolomBetonBali #SNI2847Bali #BaliArchitecture #StrukturKolom #TeknikSipilBali #SengkangKolom #BaliBuildingPermits #InfrastrukturBali #BaliContractor #SeismicRetrofitBali #EngineeringBali #StrukturGedungBali #BetonBertulang #DaktilitasStruktur #BaliCivilEngineer #GempaBali #MitigasiBencanaBali #KonstruksiModernBali #BaliStructuralReview #SafetyConstructionBali ⬅ Back to Index Artikel dalam Topik Sama 1001 Quantitative Assessment Of Environmental Degradation Induced By L 1002 Geotechnical Remediation And Topographical Re Engineering Of Post 1004 Advanced Technical Specifications And Geospatial Optimization For 1005 Algorithmic Cost Engineering And Equipment Productivity Modeling 1007 Advanced Topographic Surveying Methodologies Utilizing Electronic