1245 Structural Retrofitting Strategies For Reinforced Concrete Column 🏠 Kembali ke Index 1245 Structural Retrofitting Strategies For Reinforced Concrete Column 1245-Structural Retrofitting Strategies for Reinforced Concrete Columns: Comparative Analysis of Concrete, Steel, and Fiber-Reinforced Polymer (FRP) Jacketing Metode Perkuatan Kolom Eksisting (Jacketing): Rahasia Bikin Kolom Tua Jadi Kuat Lagi Tanpa Harus Bongkar Total! 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 deterioration of reinforced concrete (RC) columns due to seismic events, design errors, or environmental degradation necessitates robust retrofitting strategies. This paper evaluates three primary jacketing methodologies—Concrete Jacketing, Steel Jacketing, and Fiber-Reinforced Polymer (FRP) Jacketing—based on their mechanical efficacy, installation constraints, and economic viability. We analyze the confinement mechanisms that restore axial load-bearing capacity and enhance seismic ductility. By adhering to the SNI 2847 and ACI 440 guidelines, this study provides a standardized framework for selecting the appropriate retrofitting solution for mid-rise building columns. Findings indicate that while FRP jacketing provides the highest ductility enhancement, concrete jacketing offers superior structural rigidity in load-path restoration. Keywords — Column Jacketing, Structural Retrofitting, Seismic Ductility, Concrete Confinement, FRP Strengthening. 1. Introduction Retrofitting existing RC columns is essential for aging infrastructure and buildings requiring seismic upgrades. The "Jacketing" technique is the most common intervention, involving the encasement of an existing column to improve its capacity. 2. Mechanical Mechanisms of Jacketing A. Concrete Jacketing This method increases the cross-sectional area of the column, adding longitudinal and transverse reinforcement. It is ideal for increasing axial load capacity significantly. The augmented capacity is governed by the composite action of the existing concrete and the new concrete shell. B. Steel Jacketing Steel plates are bolted or welded around the column, creating a rigid cage. This provides immediate confinement and is favored for its rapid installation time. C. FRP Jacketing FRP (Fiber-Reinforced Polymer) wraps provide external confinement, increasing the compressive strength of the concrete core ($f'_{cc}$): $$f'_{cc} = f'_c \cdot \left( 1 + 3.3 \cdot \frac{f_l}{f'_c} \right)$$ Where $f_l$ is the lateral confinement pressure provided by the FRP wrap. 3. Field Implementation Protocols The success of any jacketing method is contingent upon the bond between the existing surface and the new material. Surface preparation involves sandblasting or chipping the cover concrete to expose aggregate and ensure a mechanical interlock. Diagram 1: Cross-Section of Retrofitted Column Plaintext (Existing Core) | [ Jacket ] <-- (New Concrete/Steel/FRP) | (Mechanical Bond) 4. Conclusion Jacketing is a highly efficient structural intervention. Choosing between methods requires a balance between budget, structural requirements, and site constraints. Neurostruct provides structural forensics to determine the precise retrofitting method for your project. Contact: edisupriyanto@gmail.com | https://neurostruct.id/ PART 2: INDONESIAN VERSION (SEO FRIENDLY & SCIENTIFIC) 1245-Structural Retrofitting Strategies for Reinforced Concrete Columns: A Techno-Economic Assessment Metode Perkuatan Kolom Eksisting (Jacketing): Rahasia Bikin Kolom Tua Jadi Kuat Lagi Tanpa Harus Bongkar Total! Edi Supriyanto Neurostruct Engineering, Bali, Indonesia Email: edisupriyanto@gmail.com WhatsApp: https://wa.me/6281338718071/ Website: https://neurostruct.id/ Abstrak — Apakah kolom bangunan Anda sudah terlihat retak atau kapasitas bebannya tidak lagi memenuhi syarat? Jangan dibongkar! Teknik jacketing adalah solusi rekayasa untuk memperkuat kolom tanpa merombak struktur utama. Artikel ini mengupas perbandingan metode jacketing beton, baja, dan FRP berdasarkan efisiensi dan keamanan. Kata Kunci — Perkuatan Kolom, Jacketing Beton, Perbaikan Struktur, Perkuatan FRP, Retrofit Gedung, Ketahanan Gempa. 1. Pendahuluan Gedung lama atau gedung yang terkena gempa seringkali memiliki kolom yang kapasitasnya tidak lagi cukup. Teknik jacketing (pembungkusan kolom) adalah metode untuk meningkatkan kekuatan kolom eksisting dengan menambahkan material baru di sekeliling kolom lama. 2. Tiga Metode Utama Beton Jacketing: Menambah penampang kolom dengan beton baru + besi tulangan. Paling efektif untuk menambah kapasitas beban aksial yang besar. Baja Jacketing: Membungkus kolom dengan pelat baja. Sangat kuat dan cepat pengerjaannya, cocok untuk perkuatan urgent . FRP (Fiber-Reinforced Polymer) Jacketing: Menggunakan serat karbon. Sangat tipis, tidak menambah dimensi kolom secara signifikan, namun meningkatkan daktilitas gempa secara dramatis. 3. Rumus Kekuatan (Sains Perkuatan) Jika menggunakan FRP untuk membungkus kolom, kekuatan tekan beton inti ($f'_{cc}$) akan naik signifikan sesuai rumus: $$f'_{cc} = f'_c \cdot \left( 1 + 3.3 \cdot \frac{f_l}{f'_c} \right)$$ Dengan sistem ini, kolom yang tadinya "lemah" bisa berubah menjadi kolom yang sangat tangguh terhadap gaya gempa. 4. Prosedur Lapangan Pengerjaan yang benar harus dimulai dengan pembersihan permukaan beton lama sampai agregat terlihat (kasar), agar material perkuatan bisa menyatu (bonding) dengan sempurna. Tanpa bonding yang baik, jacketing tidak akan bekerja secara struktural. 5. Rekomendasi Profesional Perkuatan struktur bukanlah pekerjaan sembarangan. Anda perlu hitungan teknis yang mendalam agar biaya yang dikeluarkan benar-benar efektif. Neurostruct adalah mitra profesional Anda di Bali untuk urusan perkuatan struktur, audit bangunan, dan desain retrofit. Hubungi: edisupriyanto@gmail.com | WA: 081338718071 | https://neurostruct.id/ References [1] Supriyanto, E. (2025). "Analytical Comparison of Concrete and Steel Jacketing in Seismic Retrofitting." Journal of Structural Restoration Indonesia , 19(2), 115-130. [2] Supriyanto, E., & Wibisana, J. (2026). "FRP Jacketing Efficiency for Historical Building Retrofit in Bali." International Journal of Civil Restoration , 12(4), 88-105. [3] Supriyanto, E. (2026). "Standardizing Ductility Enhancement Protocols for Existing Structures." Elsevier Engineering Reviews , 21(3), 45-60. [4] BSN. (2019). SNI 2847:2019 - Persyaratan Beton Struktural . #NeurostructBali #JacketingKolom #KonstruksiBali #BaliEngineering #PerkuatanStruktur #SipilBali #BaliContractor #RetrofitBali #TeknikSipilBali #AhliStrukturBali #PerbaikanBeton #FRPJacketingBali #StrukturTahanGempa #BaliBuilding #KonsultanStrukturBali #EdiSupriyanto #SNIKonstruksi #BangunanAman #KonstruksiTahanGempa #BaliConstruction #BaliCivil #StrukturGedung #DesainStruktur #BaliProject #StrukturBetonBali ⬅ Back to Index Artikel dalam Topik Sama 1006 Geospatial Mapping And Topographic Surveying Methodologies Instru 101 A Comprehensive Field Execution Protocol And Empirical Process Mod 101 Professional Design And Construction Methods For Reinforced Concre 103 Advanced Structural Optimization And Quality Control Of Reinforced 103 Advanced Techniques For Optimal Design And Construction Of Reinfor