Harsono, Harsono (2024) Pengembangan Inovasi Stainless Steel Mesh Epoxy Komposit sebagai Perkuatan (Retrofitting) Ekonomis pada Balok Beton Bertulang di Wilayah Rawan Bencana Gempa Bumi. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Carbon fiber-reinforced polymer (CFRP) secara efektif dan populer digunakan untuk perkuatan lentur balok beton bertulang (balok RC). Namun, salah satu keterbatasan penggunaan FRP selain menunjukkan penurunan daktilitas, FRP masih bertahan dengan biayanya yang tinggi. Sistem perkuatan yang lebih hemat biaya, dengan menggunakan lembaran Stainless Steel Mesh (SSM). Tujuan utama dari penelitian ini adalah menginvestigasi perilaku lentur balok RC yang diperkuat lembaran SSM dengan konfigurasi perkuatan Bottom Bond. Total lima balok RC yang digunakan dalam experimen ini. Empat balok RC diperkuat lembaran SSM dengan kerapatan rendah (SLD) dan kerapatan tinggi (SHD). Kemudian, satu spesimen balok RC sebagai balok kontrol yang tidak diperkuat. Semua spesimen balok RC dilakukan pengujian pembebanan four point bending, dan data regangan direkam bersama dengan defleksi pada bentang tengah balok RC. Dari hasil penelitian dapat diketahui bahwa kapasitas beban, kekakuan, penyerapan energi, dan daktilias pada spesimen SLD-1 dan SLD-2 mengalami peningkatan signifikan dibandingkan spesimen lainnya. Konfigurasi perkuatan dengan dua layer tidak memberikan pengaruh signifikan terhadap peningkatan kapasitas beban balok RC. Semua spesimen balok RC mengalami mode kegagalan lentur dan balok RC yang diperkuat SSM tidak terjadi mode kegagalan delaminasi. SSM High Density (SHD) tidak direkomendasikan digunakan sebagai material perkuatan balok RC, karena resin epoksi tidak dapat mengisi celah-celah antara kawat stainless dengan baik. Nilai keakuratan prediksi momen – kurvatur selain dipengaruhi oleh ketidak sempurnaan material propertis, namun dipengaruhi juga oleh meningkatnya nilai garis netral, asumsi regangan tekan beton ultimit, dan kuat tekan beton.
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Carbon fiber reinforced polymer (CFRP) is effectively and popularly used for flexural retrofitting of reinforced concrete beams (RC beams). However, one of the limitations of using FRP besides showing a decrease in ductility, FRP still persists with its high cost. A more cost-effective retrofitting system, using Stainless Steel Mesh (SSM) sheets. The main objective of this study was to investigate the flexural behavior of RC beams retrofitted with SSM sheets in Bottom Bond retrofitting configuration. A total of five RC beams were used in this experiment. Four RC beams were retrofitted with low density (SLD) and high density (SHD) SSM sheets. Then, one RC beam specimen was not retrofitted as a control beam. All RC beam specimens were subjected to four point bending tests, and strain data were recorded along with the deflection at the center span of the RC beam. The results showed that the load capacity, stiffness, energy absorption, and ductility of SLD-1 and SLD-2 specimens were significantly improved compared to other specimens. The two layer retrofitting configuration did not have a significant effect on increasing the load capacity of the RC beams. All RC beam specimens experienced flexural failure modes and SSM-retrofitted RC beams did not experience delamination failure modes. SSM High Density (SHD) is not recommended to be used as RC beam retrofitting material, as the epoxy resin cannot fill the gaps between the stainless wires well. The accuracy of moment – curvature prediction is not only affected by imperfect material properties, but also by increasing neutral line values, assumed ultimate concrete compressive strain, and concrete compressive strength.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Perkuatan balok RC, Stainless steel mesh (SSM), Ekonomis, Daktilitas, Inovasi, Disaster Risk Reduction, RC beam retrofitting, Stainless steel mesh (SSM), Economical, Ductility, Innovation, Disaster Risk Reduction |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA418.9 Composite materials. Laminated materials. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Harsono Harsono |
| Date Deposited: | 03 Jan 2025 07:03 |
| Last Modified: | 03 Jan 2025 07:03 |
| URI: | http://repository.its.ac.id/id/eprint/116119 |
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