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INDONESIA
Rekayasa Sipil
Published by Universitas Brawijaya
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
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Articles 536 Documents
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Comparison of Strain Histories on Reinforced Concrete Eccentric Braced Frame (EBF) With Vertical and Horizontal Link Wijaya, Ming Narto; Susanti, Lilya; Pinontoan, Frisca Presley
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.5

Abstract

This study investigates the seismic performance of reinforced concrete Eccentrically Braced Frames (EBF) with vertical and horizontal link beams subjected to cyclic loading. The main objective is to compare strain histories and evaluate energy dissipation in vertical and horizontal link configurations. Experimental results indicate that vertical links, especially those with shorter lengths (15 cm), exhibit higher strain values, leading to significant plastic deformation and enhanced energy dissipation, though at the cost of increased damage and repair needs. Conversely, horizontal links remain largely within the elastic range, maintaining better structural integrity but offering less energy dissipation during seismic events. The CBF (Concentrically Braced Frame) control specimen showed minimal deformation and lower energy absorption. The findings suggest that vertical links are more suitable for energy dissipation in seismic design, while horizontal links offer greater durability and lower post-event maintenance. The balance between energy absorption and repairability is crucial for optimizing EBF systems in earthquake-prone areas. (explain the findings related to the purpose of this paper: to determine the effects of link orientation on strain distribution, energy dissipation, and structural integrity during seismic events).
Development of Road Networks to Support the Development of the Government Center in the Capital City of Nusantara (IKN) Saleh, Arbillah; Djakfar, Ludfi; Wicaksono, Ahcmad
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.6

Abstract

The Indonesian government has designated the relocation of the capital city to East Kalimantan through Law No. 3 of 2022. Developing the Central Government Core Area (KIPP) within the new capital city of Nusantara (IKN) in East Kalimantan presents significant challenges and opportunities in transportation planning. This study evaluates the performance of existing and proposed road networks using integrated macro- and micro-simulation tools: CUBE Voyager and PTV VISSIM. CUBE Voyager is used for trip generation, distribution, and highway assignment, while PTV VISSIM simulates intersection performance based on detailed geometry and traffic behavior. Results indicate that without the development, key national roads such as Soekarno–Hatta will experience overcapacity by 2035, with a volume-to-capacity ratio (VCR) exceeding 1. However, traffic performance improves significantly by adding toll roads and new internal road networks. Notably, 71.7% of vehicles on the Sp. ITCI–Sp. The Riko segment is projected to shift to the toll road. Internally, KIPP's one-way road system maintains Level of Service (LOS) A through 2035, while intersections generally operate at LOS B, with one key intersection at LOS C. The findings emphasize the importance of integrated planning between land use and transportation, highlighting the role of multimodal networks and optimized traffic management strategies in supporting the future capital’s mobility and resilience. This study recommends sustainable road network development to ensure transportation efficiency in the new capital city area.
Delay Analysis of Atlas Sports Club Project Based on FTA and ETA Sari, Devita; Girsang, Hamonangan
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.7

Abstract

The development of infrastructure and commercial facilities in Indonesia continues to increase along with urbanization and economic growth, but delays in construction projects are still a significant problem. The Atlas Sport Club project in Pantai Indah Kapuk 2 (PIK 2) experienced delays caused by various factors, such as design changes, material delays, lack of communication, labor shortages, ineffective supervisory control, and extreme weather conditions. This research aims to identify and analyze the factors causing delays in the Atlas Sport Club project in PIK 2 and provide recommendations for mitigation strategies for similar projects in the future. Using quantitative and qualitative mixed methods, data was analyzed using validity and reliability tests and FTA (Fault Tree Analysis) and ETA (Event Tree Analysis) methods to understand the main causes and their impacts. The study found that work method error was the dominant factor with a probability of 0.8987. The five mitigations obtained from the pivotal event of the ETA method are completing the design and specifications at the beginning of the project; the financial process runs smoothly, the need for human resources that are by the needs and have good capabilities and experience; jointly reviewing work methods, initial designs at regular meetings; and finally procuring materials according to specifications.
Challenges of Sustainable Tourism Practice in Nigeria Egbo, James Chinweuba; Anih, Kingsley; Jonas, Obianuju Miriam; Peter, Odoh Ejike; Obiokoye , Uchechukwu Cyprian
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.8

Abstract

Tourism is recognized as one of the largest industries worldwide in terms of business volume and job creation. Following World War II, tourism was increasingly seen as a strategic tool for development. Sustainable development identifies tourism as a key driver and emphasizes the need for sustainability in tourism planning and development. While the principles of sustainable tourism development are well documented, rural development has yet to fully integrate these principles effectively. This study aims to identify gaps in existing literature and obstacles preventing a comprehensive understanding of sustainable tourism development. A range of both published and unpublished sources, including printed and electronic documents, were critically reviewed to uncover the challenges facing sustainable tourism development.
Evaluating the Performance of Python-Based Machine Learning in Earthquake-Resistant Building Design: Fuqaha, Sameh; Nugroho , Guntur
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.9

Abstract

This study investigates the feasibility of applying artificial intelligence (AI)-based machine learning techniques, specifically a Multiple Linear Regression (MLR) model implemented in Python, for earthquake-resistant building design. The AI-based predictions are compared against conventional SAP2000 structural analysis. As one of the most seismically active regions globally, Indonesia urgently requires efficient and accurate seismic design methodologies. Traditional approaches, while reliable, are often time-consuming and labor-intensive, whereas AI offers rapid data processing and automation. This research predicted key structural parameters—including mass participation ratio, base shear force, inter-story drift, and structural period—using the MLR model and benchmarked against SAP2000 simulations. The AI-based predictions exhibited excellent alignment, with an average deviation of only 0.016%. Statistical validation showed an R² score of 0.999 and a p-value of 0.738, confirming no significant difference between the two methods. Moreover, the AI model significantly reduced computational time, completing analyses within seconds compared to the extended duration required by SAP2000. Despite these advantages, the current AI framework lacks a 3D modeling interface, limiting its applicability for detailed structural design. Future research should enhance AI capabilities by integrating parametric modeling tools and Building Information Modeling (BIM) platforms to support broader implementation in earthquake-resistant structural engineering.
Simulation of the Potential Liquification of Puger Sand Soil on a Small Scale in the Laboratory Alihudien, Arief; Alfaries, M. Rifki; Rizal, Nanang Saiful
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.10

Abstract

Puger is a nearshore area in the Jember district. On the Indonesian liquefaction zone atlas map, Puger is a high liquefaction zone.  Liquefaction can occur when water-saturated soil loses its strength and behaves like a liquid due to seismic vibrations. Thus, an in-depth understanding of soil behavior and the structures above it due to liquefaction events is needed to mitigate disasters.  This study aims to effectively simulate the liquefaction potential of Puger sand material on a small laboratory scale to identify soil behavior that can cause structural damage due to liquefaction phenomena. The method used in this experiment is that water-saturated sand samples are placed in a container and subjected to vibration using a shaker to simulate the effects of an earthquake. Parameters observed include changes in density, soil deformation, and pore pressure during and after vibration. The simulation results show that the pore pressure increases sharply at a certain depth, reducing the cohesion between sand grains and causing a decrease in soil strength. This can be seen from the increase in pore pressure, which automatically decreases the effective soil stress in the soil.
Sedimentation Management in the Brantas and Bengawan Solo Reservoir Lutfie Prananto, Thomasonan; Kodoatie, Robert; Rochim, Vianka
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.11

Abstract

Sedimentation is a major issue in natural resource management in Indonesia, particularly in river basins with intense human activity such as the Brantas and Bengawan Solo. This phenomenon reduces reservoir storage capacity, shortens operational lifespan, and decreases hydropower efficiency. This study aims to evaluate sedimentation control strategies in these two critical river basins using a combination of quantitative and qualitative approaches. Field surveys and secondary data analysis revealed that the highest sedimentation rate in the Brantas Basin occurred in Wlingi Reservoir (5.359 tons/ha/year). In contrast, in the Bengawan Solo Basin, the highest rate was recorded in the Jeroan River (0.998 tons/ha/year). The erosion rates were also highest in Wonorejo (504.050 tons/ha/year) and Jeroan, respectively, indicating a strong correlation between erosion intensity and sediment yield. Several mitigation strategies were examined, including flushing, reservoir dredging, check dam dredging, and vegetative conservation. Among them, reservoir dredging and vegetative measures were the most effective. The study recommends future research on real-time sediment monitoring using IoT and AI-based sensors, optimization of vegetative conservation, and developing GIS-based hydrodynamic simulation models to support sustainable sediment management.
Application of Ultrasonic and Coating Material Thickness Testing on Post-Fire Steel Construction Citra, Zel; Antonius; Biantoro, Agung Wahyudi
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.12

Abstract

Steel has advantages over other construction materials, including flexibility and processing time. Steel has better elasticity and relatively faster processing time compared to reinforced concrete. However, the weakness is that steel is also very susceptible to temperature changes. If a steel material experiences an increase in temperature, for example, if it is directly exposed to fire, its yield and tensile strength will decrease drastically. This can cause the function of the steel material as a structural element to change. In early 2023, a fire occurred in a steel construction tower used for animal feed processing, PT. XYZ in the Lampung area. As a result of the fire, there is a concern about the risk of structural failure, which could cause worker fatalities in the building. So, it is necessary to test the thickness of steel tower structural elements such as columns, beams, and bracing using the Non-Destructive Test method with an Ultrasonic Material Gauge and Material Coating Thickness. The test samples were taken in as many as 20 samples with the test structure including column elements, beam elements, and bracing at each level or elevation of the fire-affected floor. Test sample include WF200X100X5,5x8, WF250X125X6X9, WF300X150X6,5X9, WF400X200X8X13, HB400X400X13X21 and Pipe Ø6”. The results of the post-fire steel structure measurement, the thickness of columns, beams, and bracing from 20 samples, showed that 95% still met the thickness tolerance of 0.7 mm- 1.2 mm based on the SNI 07-0329-2005. The thickness of the post-fire coating, 95% steel structural coating, did not meet the standards below 240mm. Only 5% met the minimum coating thickness standards, such as pipe bracing Ø6" with a coating thickness of 397 microns. And for repair, repainting is recommended. Repainting must be done to prevent corrosion and restore the structure's safety.
The Structural and Cost Analysis of Musholla Baitul Munjiy, Semarang Regency Dyah Kumala, Nevy Risna; Mahfuda, Anno
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.13

Abstract

Prayer rooms and mosques have evolved significantly, influenced by their respective regions' cultural and architectural traditions. Mosque construction presents challenges in balancing structural safety, long-term durability, and cost efficiency. This study uniquely combines advanced structural simulation with comprehensive cost analysis to provide an innovative design approach for mosques in earthquake-prone regions. This study utilizes SAP2000 to demonstrate how structural simulations can optimize traditional mosque designs for improved seismic resilience and cost efficiency, using the Musholla Baitul Munjiy in Bawen, Semarang, as a case study. The analysis revealed that some beams and columns had insufficient load-bearing capacity, especially concerning deflection limits. Minor modifications to beam and column dimensions significantly enhanced structural stability, highlighting the potential of targeted design improvements in seismic areas. The refined design met safety standards under seismic simulations and validated the proposed modifications' effectiveness. The findings offer a replicable design framework to enhance both structural resilience and economic viability of small-scale religious buildings in seismic-prone regions.
Analysis of Factors Affecting Labour Productivity of Lightweight Masonry Sartika Meitry; Fepy Supriani; Lindung Zalbuin Mase; Hardiansyah; Rena Misliniyati
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
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.2025.019.02.14

Abstract

Labour productivity plays an important role in determining the success of a construction project, especially in lightweight masonry work, which requires high skills and affects not only the aesthetic aspect but also the durability of the building with lightweight materials suitable for high-rise buildings. This study aims to analyse the factors affecting the productivity of lightweight masonry labour on The Establishment of the University of Bengkulu's Hospital Project. The research method used is direct observation in the field, with the work sampling method using the productivity rating approach to calculate the labour utilization rate (LUR) level. The questionnaires were distributed to lightweight masonry workers to identify factors that affect productivity. Data were analysed using validity tests, reliability tests, and the Relative Importance Index (RII) analysis, and relationships between factors were looked for using matrix correlation. The results showed that the average LUR for the level of productivity of lightweight masonry labour was 63.89% which was categorised as productive because it was above 50% with the dominant factor affecting field conditions including the availability of tools, weather, and relationships between workers with an RII value of 0.88 which is included in the high level of importance. The findings contribute to managing labour productivity in construction projects and recommend improving tool management and fostering teamwork in the field.

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