Hafish, Andra Ardhana Pramodia Hafish (2026) Optimasi Penggunaan Dan Waste Material Baja Tulangan Menggunakan Metode Linear Programming Dan Best Fit Decreasing Pada Bangunan Bertingkat. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penggunaan baja tulangan pada konstruksi beton bertulang berpotensi menimbulkan waste material akibat ketidaksesuaian antara panjang batang standar 12 m dan variasi panjang potongan yang sesuai dengan desain struktur. Permasalahan tersebut dimodelkan sebagai One-Dimensional Cutting Stock Problem (1D-CSP). Penelitian ini bertujuan menganalisis dan membandingkan optimasi penggunaan baja tulangan dan waste material menggunakan metode Linear Programming (LP) dan Best Fit Decreasing (BFD) berdasarkan jumlah batang, persentase waste, dan utilization rate. Studi kasus dilakukan pada Gedung Ditreskrimsus Polda Jawa Timur dengan objek balok, kolom, dan pelat. Data diperoleh melalui pemodelan Building Information Modeling (BIM) menggunakan Cubicost TAS dan Cubicost TRB, kemudian diolah menjadi Bar Bending Schedule (BBS) sebagai data masukan optimasi. Metode LP dimodelkan sebagai Integer Linear Programming dan diselesaikan menggunakan solver intlinprog pada MATLAB, sedangkan BFD diterapkan sebagai algoritma heuristik berdasarkan urutan panjang potongan terbesar ke terkecil. Hasil penelitian menunjukkan bahwa metode LP menghasilkan kebutuhan 19.839 batang dengan total waste material sebesar 9.000.791 mm, persentase waste sebesar 0,43%–20,78%, dan utilization rate sebesar 79,21%–99,56%. Sementara itu, metode BFD menghasilkan kebutuhan 20.283 batang dengan total waste material sebesar 14.328.791 mm, persentase waste sebesar 1,74%–22,29%, dan utilization rate sebesar 77,70%–98,25%. Berdasarkan hasil perbandingan, metode LP menunjukkan kinerja yang lebih baik dengan efisiensi jumlah batang sebesar 1,33%–1,95%, penurunan persentase waste sebesar 1,31%–1,51%, serta peningkatan utilization rate sebesar 1,31%–1,51% dibandingkan metode BFD.
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The use of reinforcing steel in reinforced concrete construction has the potential to generate material waste due to the mismatch between the standard bar length of 12 m and the varying cutting lengths required by the structural design. This problem is modeled as a One-Dimensional Cutting Stock Problem (1D-CSP). This study aims to analyze and compare the optimization of reinforcing steel utilization and material waste using the Linear Programming (LP) and Best Fit Decreasing (BFD) methods based on the number of bars, waste percentage, and utilization rate. The case study was conducted at the Ditreskrimsus Building of East Java Regional Police, focusing on beams, columns, and slabs. The data were obtained through Building Information Modeling (BIM) using Cubicost TAS and Cubicost TRB and subsequently processed into a Bar Bending Schedule (BBS) as the optimization input. The LP method was formulated as an Integer Linear Programming model and solved using the intlinprog solver in MATLAB, while the BFD method was implemented as a heuristic algorithm based on descending cutting lengths. The results show that the LP method requires 19,839 reinforcing bars, with a total material waste of 9,000,791 mm, a waste percentage ranging from 0.43% to 20.78%, and a utilization rate ranging from 79.21% to 99.56%. Meanwhile, the BFD method requires 20,283 reinforcing bars, with a total material waste of 14,328,791 mm, a waste percentage ranging from 1.74% to 22.29%, and a utilization rate ranging from 77.70% to 98.25%. Based on the comparative results, the LP method demonstrated better performance than the BFD method, achieving 1.33%–1.95% higher efficiency in the number of bars, 1.31%–1.51% lower waste percentage, and 1.31%–1.51% higher utilization rate.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Kata kunci: Baja Tulangan, Waste Material, Bar Bending Schedule, Linear Programming, Best Fit Decreasing. Keywords: Reinforcing Steel, Bar Bending Schedule, Building Information Modelling, Linear Programming, Best Fit Decreasing. |
| Subjects: | T Technology > T Technology (General) > T56.8 Project Management T Technology > T Technology (General) > T57.74 Linear programming T Technology > T Technology (General) > T57.84 Heuristic algorithms. T Technology > TH Building construction > TH438.13 Building information modeling. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering |
| Depositing User: | Andra Ardhana Pramodia Hafish |
| Date Deposited: | 28 Jul 2026 04:16 |
| Last Modified: | 28 Jul 2026 04:16 |
| URI: | http://repository.its.ac.id/id/eprint/138469 |
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