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All Journal AGREGAT Advance Sustainable Science, Engineering and Technology (ASSET)
Muhamad Fauzan Akbari
Universitas Pembangunan Nasional "Veteran" Jawa Timur
Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Transportation

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Financial Performance Assessment of Flat Buildings Using Life Cycle Cost and Cost–Benefit Analysis Griselda Junianda Velantika; Reguel Mikhail; Karina Meilawati Eka Putri; Elok Dewi Widowati; Rizqi Alghiffary; Muhamad Fauzan Akbari
Advance Sustainable Science Engineering and Technology Vol. 7 No. 1 (2025): November-January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i1.1005

Abstract

Buildings resulting from construction projects are durable assets and decisions related to construction projects have enduring impacts. In many cases, building owners prioritize only the initial costs, such as building design, construction, and equipment costs, while neglecting the future operation and maintenance costs. This research studies life cycle costing (LCC) analysis to evaluate the financial feasibility of urban housing. The LCC calculates all the costs incurred and benefits during the building's operation. The cost is generated from construction, operational, and maintenance costs. At the same time, the benefit breaks down into flat rental costs, retail rental costs, and parking costs. The costs incurred are estimated over 25 years, and the parameters of feasibility are net Present Value (NPV), Benefit-Cost Ratio (BCR), and Internal Rate of Return (IRR). The study generates negative NPV, BCR < 1, and 0.61% of IRR. It indicates that the project is not feasible. This research gives alternatives to make the project feasible. This study employed a trial-and-error approach to ascertain the viability of investing in flat rentals by systematically adjusting rental rates. Incremental adjustments to rental rates are tested by a series of rate hikes of 50%, 100%, 150%, and 200% using a trial-and-error approach. The project will become feasible if the flat rate increases to 150-200% of the initial rental rate.
Analisis Evaluasi Tiang untuk Stabilisasi Lereng dengan Metode Elemen Hingga Dua Dimensi Karina Meilawati Eka Putri; Griselda Junianda Velantika; Rizqi Alghiffary; Elok Dewi Widowati; Muhamad Fauzan Akbari
AGREGAT Vol 11 No 1 (2026)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v11i1.31293

Abstract

Landslides due to slope instability are natural phenomena that can lead to substantial damage to infrastructure, loss of property, and human fatalities. Slope-stabilizing piles are among the most effective and widely used recently to increase slope stability. This paper presents an evaluation of slope-stabilizing piles using 2D finite element method (FEM), including a parametric study on the effects of pile diameter, pile spacing, and pile length on the pile responses, such as bending moment and deformation. The analysis conducted in this research employed the 2D FEM. FEM modeling was performed with the plane strain model and the Hardening Soil (HS) soil constitutive model. A parametric study was conducted by varying the pile parameters, such as pile length (12, 16, and 20 meters), diameter of pile (0.6, 0.8, 1.0, and 1.2 meters), and pile spacing (1.5D, 2D, 3D, and 4D). Based on the analysis results, pile length shows the most significant influence on slope stability; an increase in pile length is proportional to an increase of the factor of safety and bending moments but inversely proportional to the resulting deformation. On the other hand, pile diameter was found to have no significant impact on the improvement of the Factor of Safety in this study, although dimensional variations affect internal forces, specifically regarding deformation and bending moment distribution within the pile. Furthermore, increasing the spacing between piles tends to decrease the factor of safety because it weakens the soil arching mechanism, which subsequently increases deformation at the pile head. This research suggested that the optimization of slope stability is more dependent on the embedment length of pile and pile spacing rather than the pile diameter.
Co-Authors Elok Dewi Widowati Griselda Junianda Velantika Griselda Junianda Velantika Karina Meilawati Eka Putri Karina Meilawati Eka Putri Reguel Mikhail Rizqi Alghiffary Rizqi Alghiffary