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Rekayasa Sipil
Published by Universitas Brawijaya
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Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
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Articles 536 Documents
 48   49   50   51   52 
Assessment of Energy Efficiency and Conservation Aspects Based on Building Information Modeling at Park Residence Building Faridah, Yunita Hasna; Girsang, Hamonangan
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.018.03.15

Abstract

To save energy, according to two aspects of the Sustainable Development Goals (SDGs), namely Sustainable Urban Development (SDG 11) and Climate Change (SDG 13), concrete efforts that can be made are increasing energy efficiency and conservation, reducing greenhouse gas emissions, and strengthening resource sustainability. One of the initial efforts that can be made to increase energy efficiency and conservation is by applying Building Information Modeling (BIM) for energy simulation in building structures. One of the BIM-supporting software that can be used in energy simulations is Autodesk Revit, which functions for architectural, structural, mechanical, electrical, and plumbing (MEP) modeling, and Autodesk Green Building Studio, which is a cloud-based media for conducting simple simulations of building performance so that various aspects of its energy can be analyzed for assessment. The Green Building aspect assessment of GBCI used is the GREENSHIP Existing Building Ver1.1 parameter, taken from the Energy Efficiency and Conservation (EEC) aspect, which is a quantitative assessment and can be modeled. The results of the EEC aspect assessment using a quantitative assessment tool obtained a value of 5 points from a total maximum value of 28 points. This value indicates that the 1 Park Residence Building is a building that has not implemented Green Building and requires actions that support the sustainability aspect of the building.
Reinforcement of Slope Failure on Ponorogo – Pacitan KM 226 Road to Mitigate Landslides Akbarrina, Ailia Rizky; Zaika, Yulvi; Rachmansyah, Arief
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.1

Abstract

Slope collapse can be caused by changes in load or geological conditions of the soil. Slope collapse events often occur during the rainy season in the Ponorogo area, Pacitan East Java, Indonesia, which causes closed transportation to and out of the Ponorogo area. This study aims to investigate the failure mechanism and landslide mitigation. The field investigations were conducted using geoelectricity and soil sampling to be analyzed in the laboratory. This research employed the Schlumberger geoelectrical configuration method to determine the subsurface rock lithology arrangement. The study involved acquiring data on four geoelectrical lines with a length of 135 meters. The collected field data was then processed and modeled to obtain an overview of the subsurface rock lithology arrangement. The Laboratory tests were conducted to determine the soil type and the soil parameters unit weight (?), cohesion (c'), and shear angle (?'). The laboratory data was input into software to obtain the safety factor. The geo-electrical results showed layers of clay and tuff, which identified a water flow between them, the landslide plane. Based on the finite element analysis, the landslide planes were almost coincident. Slope stability is achieved by changing the geometry and reinforcing it with piles.
Determination of Tourist Bus Fares in Batu City Based on Ability to Pay, Willingness to Pay, and Vehicle Operating Cost Mochammad Suhaji Ismail; Achmad Wicaksono; Agus Dwi Wicaksono
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.2

Abstract

Batu City often experiences traffic congestion. This congestion is caused by the road network in Batu City needing to be proportional to the number of vehicles present. Therefore, breakthroughs (innovations) are required to reduce traffic jams and make it easier for tourists visiting Batu City to reach tourist areas. However, attention must be given to several important factors, including the community's preference for using the Batu City Tourist Bus and the Willingness to Pay (WTP), Ability to Pay (ATP), and Vehicle Operating Costs (BOK) to determine a fare that aligns with these aspects. The method used is a quantitative approach with frequency distribution analysis techniques, Willingness to Pay (WTP) analysis, Ability to Pay (ATP) analysis, and Vehicle Operating Costs (BOK) analysis. The study results show that 71% of tourists are interested in using the tourist bus, mainly because of the ease and comfort of travel, cost efficiency, tourism development, and flexibility. The tourist bus fare based on ATP is IDR 64,397, and the fare of the two routes based on WTP is IDR 24,219 and IDR 24,730. Then, on the BOK calculation, the fare is IDR 54,972 and IDR 45,450. Therefore, the determined fare for the Batu City Tourist Bus for a single round trip is IDR 30,000, with a government subsidy for the tourist bus's BOK amounting to IDR 329,520,297 per year. This study's results are expected to serve as a consideration for the Batu City Government in determining the fare for the Batu City Tourist Bus.
Causality Analysis of Construction Failure Using The Event Tree Analysis Method and Fault Tree Analysis Ambartiyas, Puspita; Bhaskara, Adwitya
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.3

Abstract

A Hotel Apartment project had to be halted, leaving the existing building abandoned for several years. The adverse impacts of abandoned buildings can be structural, physical, environmental, aesthetic, health, economic, reputational, and ecological. Abandoned buildings with unknown structural strength are very vulnerable to disasters and can be dangerous if they collapse. This research was conducted to analyze the causality of construction failure in an Apartment Hotel that has been abandoned for the past 6 years using the Event Tree Analysis (ETA) and Fault Tree Analysis (FTA) methods. The study aimed to determine the probability and causes of construction failures and identify the associated risks. Visually, the building experienced some damage to some of the structural components that had been built. The results of the Rapid Visual Screening analysis show that the building has damage to the components of the existing structural elements with a percentage of 43.67% and is included in the Moderate Damage damage level category. Based on the RVS results, an evaluation is carried out using Event Tree Analysis and Fault Tree Analysis to determine the causal flow of construction failure scenarios and the causes of construction failure.
Analysis of Flood Occurrence in Pekanbaru City Using Google Earth Engine Rahmatul Irfan; Sutikno, Sigit; Yusa, Muhamad
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.4

Abstract

The phenomenon of climate change is associated with various disasters in the community. During the year 2023, the city of Pekanbaru often experienced floods that were scattered at several locations, resulting in both material and non-material losses. To reduce the impact of losses incurred and flood disaster mitigation plans, it is necessary to map floods in Pekanbaru because information related to flood events is difficult to access and is known by the community. In this research, flood mapping uses one of the practical recommendation methods from UN-SPIDER, using Google Earth Engine and SAR-1 sentinel imagery; this method was chosen because it is efficient in both time and data in flood mapping. The results of flood mapping in Pekanbaru during 2021-2023 found that the largest area occurred in 2021, covering 2714 Ha, then in 2023, covering 867 Ha, and in 2022 covering 310 Ha. The threshold value specifically for the Pekanbaru city area is 1.17, known through the threshold value calibration, namely repeated testing by comparing the results of the area obtained. Validation of the results of the distribution model on flood mapping in the city of Pekanbaru used comparative data on flood event records from BWSS III and BPBD Pekanbaru city; the results of flood distribution in Google Earth Engine have the suitability of flood distribution prediction location points with actual flood disaster record points.
Banana Stem Fiber Potential as an Alternative Natural Geosynthetic Material for Soil Reinforcement and Protection Bartholomeus, Bartholomeus; Purba, Luki Hariando; S P Manurung, Charles; Sihombing, Wanto Poller
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.5

Abstract

Geosynthetics for soil reinforcement and protection require tensile strength and the ability to absorb water. Based on previous studies, it was found that banana stem fibers have both of these mechanical properties of geosynthetics. However, these two strong mechanical properties are not enough for geosynthetic applications. Several other mechanical properties are needed. Therefore, geosynthetic samples were made using spun and woven banana stem fiber materials in this study. The spun was made with different diameters, namely 5 mm, 7.5 mm, and 10 mm, and woven like a mat for one direction of tensile force. Then, additional tests were carried out in addition to tensile strength and water absorption, such as tear strength, puncture strength, and permeability based on permittivity. From the test results, only the woven fabric with a 5 mm spun diameter meets all requirements except for its permittivity value, where the average tensile strength, average tear strength, and average puncture strength obtained for elongation <50% are 32.0 kN/m, 628.7 N, and 1915.8 N, respectively. At the same time, the average water absorption for all diameter variations is 408.07% to 441.86%. So banana stem fibers, especially those with a 5 mm spun diameter, have the potential as an alternative natural geosynthetic material for soil reinforcement and protection by considering the spun fiber woven pattern to improve the permittivity.
Stability Analysis of Replacement Material in Dam Body at Meninting Dam Wildan Faris Alamudi; Indra Nurtjahjaningtyas; Luthfi Amri Wicaksono
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.019.01.6

Abstract

Embankment material in dam construction is an important aspect that needs to be considered. The lack of embankment material around the dam is a problem in the Meninting Dam construction project, so it uses materials outside the dam area. With the change in the embankment material used, research is needed on the stability of the dam body. This study aims to determine the characteristics of the replacement material, seepage capacity, uplift force, and slope stability safety factor at the dam. Physical tests are used to determine the physical characteristics of the soil (moisture content, soil specific gravity, rock specific gravity, soil plasticity index filter analysis), while the mechanical test is performed to determine the soil's movement, strength, stiffness, and deformation. This study also uses software assistance, such as Geostudio from Rockscience slide, to calculate a slope's stability level. The results showed that the value of the safety factor obtained on the upstream slope without earthquake is 3.463, the upstream slope with OBE earthquake is 2.057, the upstream slope with MDE earthquake is1.588, the downstream slope without earthquake is 3.117, the downstream slope with OBE earthquake is 2.288, downstream slope with MDE earthquake is 1.898. The value of the safety factor is declared safe because the value obtained is >1.5 conditions without an earthquake and >1.2 conditions with an earthquake. The uplift value on every equipotential is 10.58 t/m2. The value of seepage capacity that comes out downstream of the dam is 4,529 x 10-5 m3- seconds. Seepage capacity is said to be safe because < 0.0127 m3- seconds. The lack of stone material as the main constituent of dam deposits in the research area is the main factor in this study, which focuses on finding the value of the safety factor, lifting force, and seepage capacity of the replacement material for dam deposits. This research will use soil-filling material as a substitute for the Constituent stones, which are very limited in number at the research site.
Optimization of the Number and Type Composition of Houses in Housing Development Using the Simplex Method (Case Study: Pesona Arjuna Residence, Malang Regency) Abdullah, Ali; Suharyanto, Agus; Suryo, Eko Andi
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.7

Abstract

The rising population in Indonesia has led to an increasing demand for housing, presenting opportunities and challenges for property developers. Although luxury homes yield higher profits, most consumers favor affordable housing. This study aims to optimize the quantity and type composition of homes in Pesona Arjuna Residence, Malang Regency, using the Simplex Method to maximize profits. Developers need to balance market demand and government regulations, which require including affordable and middle-income homes alongside luxury units. The Simplex Method is applied in this study to determine the ideal composition of housing units by factoring in key constraints such as available land, production costs, and market demand. The findings reveal that houses in buildings 12 type A, 18 type B, and 23 type C yield the highest profitability. The Net Present Value (NPV) of Rp 610,940,579.76 at a 10% discount rate confirms the project’s financial success, while the Internal Rate of Return (IRR) of 13.49% indicates a solid annual return on investment. A Benefit-Cost Ratio (BCR) of 1.617 further supports the project’s financial viability, though careful consideration of market fluctuations and risks is advised. This research contributes to sustainable urban planning by offering a flexible approach to housing development, enabling developers to better adapt to market trends and optimize profits while addressing community housing needs.
Inelastic Behavior of Eccentrically Braced Frames with Vertical Links: A Numerical Study Shendri, Christina Natasha; Tjahjanto, Helmy Hermawan; Nugroho, Wivia Octarena; Pratiwi, Naomi
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.8

Abstract

Eccentrically Braced Frames (EBFs) are seismic-resistant steel structures with horizontal or vertical energy-dissipating links designed to enhance ductility. To promote sustainability, future designs are moving toward easily replaceable structural systems that enable rapid post-earthquake rehabilitation. However, EBFs with horizontal links present challenges in repairing damaged links due to interference with other components, particularly beams. As an alternative, vertical links offer the potential to serve as "replaceable elements." Despite this advantage, no specific design guidelines currently address the lateral support requirements for EBFs with vertical links, unlike the horizontal ones. This study analyzes the inelastic behavior of EBFs with vertical links using numerical methods based on the finite element method. The results indicate that vertical link length classification and capacity design methods specified for horizontal links also apply to vertical links. This is evidenced by the shear force values in the three samples representing short, medium, and long links, resulting in values of 2.15Vp, 1.32Vp, and 1.13Vp, respectively, with the shortest link classified as a shear link. The degradations of the horizontal load capacities due to the application of initial deformation, simulating the first buckling mode, are less than 0.01% for all configurations. This verifies that without lateral supports, the vertical links could still effectively dissipate energy through flexural and/or shear yielding without lateral instability issues.
Analysis of Mathematical and Graphical Relationships Between Volume, Speed, and Density of Traffic with Greenshields and Underwood Models (Case Study: Ir. H. Juanda Street, Central Jakarta) Ignasius Nugroho, Reinhart; Hagni Puspito, Imam
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.9

Abstract

DKI Jakarta Province is one of the centers of transportation progress in Indonesia. One of the locations around Jakarta that is of great concern is the Juanda area, specifically on Ir. H. Juanda Street, Central Jakarta. The daily activity of motorized vehicle users on this road looks very congested on busy days such as Wednesday and Friday and quieter on Sunday. All vehicle activities on the road can be modeled to determine the relationship based on the traffic flow characteristics. The data obtained in the field, such as volume and speed, will be processed first with basic relationships using PKJI standard, then can be analyzed with mathematical and graphical relationships to present the relationship between volume, speed, and density of traffic on Wednesday, Friday, and Sunday on Ir. H. Juanda Street, Central Jakarta with Greenshields and Underwood models. The analysis results according to the relationship between volume, speed, and density of traffic with PKJI standard is suitable for Ir. H. Juanda Street on the Underwood model because it shows the strongest relationship with the r value of 0,940475 between speed and density to produce the equation Us = 46,22 exp (-0,02 D), Q = 55,84 Us ln (46,22/Us), and Q = 46,22 D exp (-0,02 D). The Underwood model has the best accuracy on Sunday, with the r2 value of 0,885001. The determination coefficient shows how well the regression prediction of the model is based on field data with an accuracy of 88,5%. The highest maximum volume was obtained using the Underwood model on Wednesday at 1.319,07296 SMP/hour.

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