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All Journal SAINSTEK Eduvest - Journal of Universal Studies
Muhammad Zaki
Universitas Trisakti
Aerospace Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Engineering Health Professions Materials Science & Nanotechnology Mechanical Engineering Neuroscience Social Sciences

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Estimasi Perbandingan Pekerjaan Dinding Panel GRC Dan Bata Ringan Untuk Partisi Ruangan Fahmy Hermawan; Wahyu Sejati; Muhammad Zaki; Ardilla Jefri Karista
SAINSTEK Vol. 10 No. 2 (2022)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v10i2.161

Abstract

Bangunan sederhana memiliki kinerja struktur yang optimal jika terjadi gempa apabila berat bangunan yang ringan, dirancang dengan memenuhi kriteria desain seismic yang tepat dan tingkat kinerja bangunan yang optimal. Untuk mengurangi berat bangunan dapat dilakukan dengan memilih material konstruksi ringan namun memiliki usia pakai yang panjang serta mudah perawatan. Berat bangunan terdiri dari berat struktur dan berat material finsihing. Berat struktur diperoleh melalui analisa struktur yang efektif sedangkan berat material finishing diperoleh dengan memilih material yang ringan. Berat material finishing yang terbesar salah satunya berasal dari dinding. Mengganti dinding bata menjadi dinding partisi adalah salah satu solusi untuk mengurangi berat bangunan, manfaat lainnya adalah pengurangan biaya finsihing dan mempercepat waktu pelaksanaan serta meningkatkan kinerja bangunan karena daktilitas lebih tinggi. Estimasi pekerjaan dinding panel GRC (Glass Reinforced Concrete) akan menunjukan biaya yang lebih murah jika dibandingkan dengan estimasi pekerjaan dinding bata ringan pada partisi ruang yang implikasinya akan memberikan banyak manfaat dan keuntungan bagi pemilik rumah di daerah rawan gempa.
Cost Analysis of Construction Using the Cost Significant Model and Artificial Neural Network or Feasibility Study Cost Estimation in Process Industry (Case Study: Feasibility Study Projects in the Process Industry Sector in Indonesia) Isma Fajar; Muhammad Zaki; Darmawan Pontan; Tulus Widiarso
Eduvest - Journal of Universal Studies Vol. 5 No. 7 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i7.50381

Abstract

The process industry plays a vital role in the global economy, with increasing complexities requiring significant capital investment for projects. Accurate cost estimation in the early stages is critical to avoid cost overruns, delays, and poor quality. During the feasibility study phase, accurate cost estimation is crucial for project success. This study employs the cost significant model (CSM) to identify key cost elements influencing the total construction cost and compares the model's accuracy with actual costs in 50 process industry projects in Indonesia from 2010 to 2024. Artificial Neural Networks (ANN) with backpropagation are also used to validate the model and calculate the Mean Absolute Percentage Error (MAPE) for accuracy assessment. Analysis identifies significant cost components such as Mechanical ISBL (55.89%), Mechanical OSBL (7.65%), Electrical (6.06%), and Superstructure (15.07%), collectively contributing 84.66% of total costs. ANN-ALL achieves the highest accuracy (L: -4.76%, H: 0.55%), followed by CSM Model 3, ANN-CSM, and others, as per AACE International guidelines. Models exceeding Class 4 benchmarks are unsuitable for feasibility studies. Data analysis combines regression using SPSS and ANN modeling with MATLAB, highlighting the ANN-ALL model's superiority in cost estimation accuracy.
Analysis of the Potential Cost of Damage Due to Liquefaction on Two-Story Residential Buildings in North Jakarta Farhan Heryo Nugroho; Muhammad Zaki
Eduvest - Journal of Universal Studies Vol. 6 No. 5 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i5.52699

Abstract

This study is motivated by the high seismic activity in Indonesia due to the interaction of three major tectonic plates, as well as the geological conditions of coastal areas such as North Jakarta, which are dominated by soft, water-saturated alluvial soils prone to liquefaction. This phenomenon can lead to severe structural damage and significant economic losses, particularly for two-story residential buildings. This research aims to analyze the liquefaction potential and estimate the economic losses caused by building damage in North Jakarta. The study employed a quantitative descriptive approach using Standard Penetration Test (N-SPT) data from 26 drilling points. Key geotechnical parameters, including Cyclic Stress Ratio (CSR), Cyclic Resistance Ratio (CRR), Magnitude Scaling Factor (MSF), and Safety Factor (SF), were calculated. Earthquake acceleration (amax) was also analyzed using Donovan, McGuire, and Matuschka methods. The results indicate that liquefaction potential increases with earthquake magnitude, with critical conditions occurring at a magnitude of 5.5 Mw, where all points experience liquefaction in shallow layers. Cilincing and Ancol are identified as the most vulnerable areas due to low N-SPT values and shallow groundwater levels. The estimated total economic loss reaches IDR 4.734 trillion, with per capita losses ranging from IDR 3.4 million to IDR 6.3 million. In conclusion, North Jakarta faces high liquefaction risk with substantial economic impacts, highlighting the need for mitigation strategies in urban planning and structural design.
Cost Aspect in the Stability Analysis of an Earthfill Dam with Respect to Variations in Embankment Materials and Water Levels (Case Study: Cibeet Dam Project, Bogor Regency) Muhammad Faizal; Muhammad Zaki
Eduvest - Journal of Universal Studies Vol. 6 No. 5 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i5.52728

Abstract

Stability analysis was carried out using PLAXIS 2D based on the Finite Element Method with the Shear Strength Reduction (SSR) approach. Two design alternatives were evaluated: Model 1 with a complete material zoning system consisting of sand–gravel, sandstone, and coarse filter layers, and Model 2 with a simplified configuration dominated by sandstone material. The evaluation was performed under Low Water Level (LWL), Normal Water Level (NWL), and Flood Water Level (FWL) conditions, as well as under static loading, Operating Basis Earthquake (OBE), and a design earthquake with a magnitude of 7.5. The results indicate that increasing reservoir water levels and seismic loading lead to a reduction in the Safety Factor (SF); however, all analyzed conditions still satisfy the required stability criteria. Model 2 exhibits higher SF values under static conditions, while Model 1 demonstrates superior stability performance under strong earthquake loading and long-duration seismic events. Cost analysis shows that the total construction cost of Model 1 is IDR 566.85 billion, whereas Model 2 requires IDR 558.86 billion, resulting in a cost saving of 1.41% for Model 2. The integrated analysis reveals a clear trade-off between stability and cost, where Model 1 provides higher technical safety, while Model 2 offers greater economic efficiency.
Co-Authors Ardilla Jefri Karista Fahmy Hermawan Farhan Heryo Nugroho Isma Fajar Muhammad Faizal Pontan, Darmawan Tulus Widiarso Wahyu Sejati