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Astonjadro
Published by Universitas Ibn Khaldun Bogor
ISSN : 23024240     EISSN : 26552086     DOI : http://dx.doi.org/10.32832/astonjadro
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Astonjadro: Jurnal Rekayasa Sipil adalah jurnal ilmiah dibidang teknik sipil p-ISSN : 2302-4240 dan e-ISSN : 2655-2086. Jurnal Rekayasa Sipil Astonjadro diterbitkan untuk mengapresiasi dan memberikan informasi ilmiah bagi peneliti, dosen serta para profesional. termasuk dalamnya pengembangan model dan konsep penelitian yang mengacu secara berkesinambungan. Jurnal Astonjadro diterbitkan oleh Fakultas Teknik dan Sains Universitas Ibn Khaldun Bogor, terbit dua kali dalam satu tahun yaitu bulan Juni dan Desember.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 537 Documents
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Impact of Road Gradient on Fuel Consumption, Fuel Rate and CO₂ Emissions of Freight Transport Abdul, Rahman; Hakzah, Hakzah; Andriyani, Andriyani; Jasman, Jasman; Kasmaida, Kasmaida
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21234

Abstract

This study investigates the impact of road gradient on fuel consumption, fuel rate (FR), and CO₂ emissions in freight transport vehicles with two-axle and three-axle configurations. The research was conducted on a 250-meter road segment with a 0.067 rad (~7%) gradient in front of Taman Rekreasi Datae, Sidenreng Rappang Regency, South Sulawesi, Indonesia. A quantitative mathematical model, based on vehicle technical parameters and empirical formulations from previous studies, was applied. Results show that increasing the gradient from 0 to 0.067 rad raised fuel consumption in two-axle trucks from 0.0356 L to 0.0857 L and in three-axle trucks from 0.1463 L to 0.3269 L. The FR for two-axle trucks increased from 0.0014 L/s to 0.0056 L/s, while for three-axle trucks it rose from 0.0033 L/s to 0.0124 L/s. CO₂ emissions from two-axle trucks increased from 0.0958 kg to 0.3941 kg, and from 0.2310 kg to 0.8807 kg for three-axle trucks. The relative increase was higher for two-axle trucks (311%) than for three-axle trucks (281%), due to axle load distribution, engine capacity, and transmission ratio. These findings highlight the need to consider vehicle configuration and topography in route planning to minimize fuel consumption and emissions in hilly regions.
Analysis of Pedestrian Satisfaction toward the Repurposing of Sidewalks along Muara Karang Raya Street Yandrie, Fernando Donica; Widyaningsih, Nunung
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21264

Abstract

This study aims to analyze the quality of pedestrian pathways along Muara Karang Raya Street both technical and user perception perspectives. The research methodology includes evaluation of existing conditions, measurement of Level of Service (LOS), Customer Satisfaction Index (CSI), and Importance Performance Analysis (IPA). Findings indicate that while the sidewalks technically perform well with LOS category D, its disturbances from illegal parking, street vendors, and online motorcycle taxis. User satisfaction level reaches 55.95%, indicating moderate satisfaction despite various constraints. IPA analysis reveals that the aspect of orderliness (presence of street vendors/PKL, illegal parking, and online motorcycle taxis) and sidewalk width are in quadrant I; slope, supporting facilities (trash bins, lighting, seating), facilities for disabled persons, and presence of shelters are in quadrant II, accessibility to/from sidewalks, safety, and physical obstacles are in quadrant III, and sidewalk surface conditions are in quadrant IV. The study recommends sidewalk usage regulation, improvement of supporting facilities, and routine maintenance to optimize pedestrian functions. These findings provide significant contributions for pedestrian-oriented public space planning in urban areas.
The Effect of the Variation of the Addition of Concrete Waste as a Substitute for Aggregate on the Compressive Strength of Concrete Aqli, Rasiful; Andardi, Faris Rizal; Wahyudiono, Sandi
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21266

Abstract

This study investigates the utilization of recycled concrete aggregate as a replacement for natural aggregate in concrete mixtures. Various mixture variations were created by replacing both coarse and fine aggregates with recycled concrete waste at percentages of 20%, 40%, 60%, and 80%. Additionally, 10% rice husk ash was added as a partial replacement for cement. Material and mix design tests were conducted to achieve a target concrete compressive strength of 30 MPa. Cylindrical test specimens were cured for 28 days and then tested for their compressive strength. The test results were analyzed to determine the effect of recycled concrete waste on the concrete's compressive strength. This research is expected to provide a basis for the effective and sustainable use of recycled concrete waste in the construction industry. 
Carbon Footprint Analysis of Electrical Energy Use: Case Study Pancasila University Anifah, Lupi; Rimantho, Dino
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21308

Abstract

The increase in greenhouse gas (GHG) emissions due to human activities, including electricity consumption, has become a pressing global issue. This study analyzes the carbon emission footprint from electricity use at the Faculty of Engineering, Pancasila University with a quantitative approach based on an inventory of electronic devices and questionnaires. The results show that total carbon emissions reached 1,358.57975 tons of CO₂-eq/year for CO₂ compounds, 33,964.49376 tons of CO₂-eq/year for CH₄, and 404,856.7656 tons of CO₂-eq/year for N₂O. Air conditioner and lighting inventories are the largest contributors every day, reaching 2,350.78 kg CO₂/kWh for AC use and 1,226.07 kg CO₂/kWh for lighting use. The recommended strategy based on the analysis results requires energy efficiency measures and the use of renewable energy, and emphasizes the need for a green campus policy to achieve the SDGs targets.
Evaluation of Pilot Ladder Safety Systems Using a Checklist Approach: Case Study on MV Westerdam and MV Hao Qiang 57 at Tanjung Perak Port Narko, Narko; Wahyudi, Slamet Imam; Sulistyo, Juny Andry
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21338

Abstract

Pilot ladder operations are a critical component of pilotage services and inherently involve high safety risks. Although international standards such as SOLAS and ISO 799-1 provide strict guidelines, accidents continue to occur due to technical limitations, human factors, and managerial deficiencies. This study assesses the pilot ladder safety systems on Cruise Ship MV Westerdam and Cargo Ship MV Hao Qiang 57 at Tanjung Perak Port. A descriptive qualitative approach was employed using a safety checklist, short interviews, and limited observations, focusing on six aspects: ladder condition, safety fittings, lighting, cleanliness, usage, and maintenance. The results show that MV Westerdam achieved full compliance (100%) with all safety standards, supported by complete maintenance records and regular crew training. In contrast, the MV Hao Qiang 57 demonstrated only 70% compliance, with key deficiencies in the availability of safety harnesses, updated crew training, and maintenance documentation. These findings indicate that pilot ladder safety cannot be ensured solely through the physical conditions of the ladder but requires an integrated approach encompassing technical, human, and managerial dimensions. MV Westerdam illustrates best practices in implementing safety systems, while MV Hao Qiang 57 highlights critical areas for improvement. Overall, this study provides both theoretical contributions to maritime safety literature and practical recommendations for enhancing safety systems in Indonesian ports.
Analysis of the Performance of Tongkonan Traditional House Structure Against Earthquake Loads Ampangallo, Bastian A.; Honta, Zwengly Lodi; Manga, Jufri
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.21719

Abstract

The Tongkonan building in Toraja is one of many structures in the archipelago that possesses a unique form, structure, and construction. The traditional house of the Toraja tribe located in South Sulawesi Province is called the Tongkonan. This building is made of wood. The traditional house differs from other traditional houses in terms of its structural system, making the Tongkonan a very interesting subject for research. Along with the advancement of time, it is important to study and analyze the structure of Tongkonan in order to enhance its resilience to earthquakes. This research aims to analyze the behavior of the Tongkonan structure under earthquake loads. The structure of the Tongkonan house is modeled in SAP2000 software to obtain the internal forces acting on the structural elements of the Tongkonan house. Then an analysis was conducted on the beam section, resulting in the internal force analysis occurring within the structure. The internal forces of the Tongkonan structural elements refer to the principles of tension and compression members, beam-columns, and flexural members, depending on the internal forces acting on each element. The results of the structural modeling analysis show that Tongkonan I is more resistant to earthquakes, with a minimum axial value of –1385.74 kN, a maximum axial value of 204.14 kN, a minimum shear value of –719.82 kNm3, and a maximum shear value of 719.82 kNm3. Meanwhile, Tongkonan II has a minimum axial value of –1550.31 kN, a maximum axial value of 457.67 kN, a minimum shear value of –813.23 kNm3, and a maximum shear value of 813.24 kNm3.
Analysis of Queue Decomposition Time Due to Railway Crossing Gate Closure to Avoid Dissaster Waluyo, Waluyo; Bihtiari, Adib Mufti; Sukatiman, Sukatiman
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.22345

Abstract

This research was conducted on a segment of railway at HOS Cokroaminoto Road which aims to analyze: (1) Traffic volume; (2) Delay and queue occurred due to the at-grade railway crossings; (3) Level of service; (4) Queue decomposition time due to railway crossing gate closure. The population of this research are the traffic data at an at-grade crossing in Surakarta City and the sample of this research are at-grade crossing traffic data on HOS Cokroaminoto Road segment, in Surakarta. The sampling technique used is purposive sampling technique. The data in this research is analyzed by applying inferential analysis. The research results are as follows: (1) The average traffic volume is 577,538 PCU/hour from north to south direction and 222,025 PCU/hour from the opposite direction. (2) The average delay occurred is 219,058 seconds on the north to south direction and 227,025 seconds on the opposite direction. The average of the queue length occurring is 95,25 meters on the north to south direction and 97,048 meters on the opposite direction. (3) The level of service based on the daily traffic volume is on A level on both directions, while based on the traffic volume during the at-grade railway crossing closure is on F level. (4) The average of queue decomposition time due to the at-grade railway crossing closure is 91,0833 seconds from north to south direction and 98,325 seconds from the opposite direction.

Page 54 of 54 | Total Record : 537

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