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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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Analysis of Raw Water Availability for Clean Water Needs of Podomoro City Housing Tenjo, Bogor Regency Chayati, Nurul; Lutfi, Muhamad; Insan, Muhammad Khaerul; Syaiful, Syaiful; Ramadhani, Ghinaya Hasnaa; Yosaeni, Akhmad Harish
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.v15i1.19265

Abstract

The availability of clean water in Tenjo Subdistrict, Bogor Regency, is still considered unable to meet the needs of the community. Tenjo Sub-district residents utilize Cidurian River water for various activities and daily needs, such as drinking water, irrigation of rice fields, and ponds. However, the Cidurian River often experiences bad water. Based on this, Perumda Air Minum Tirta Kahuripan Bogor Regency wants to meet the need for clean water by planning the construction of a Water Treatment Plant (IPA) in the Tenjo District area, especially Podomoro City Housing Tenjo Bogor Regency. The purpose of this research is to analyze the availability of raw water for clean water needs and planning of the clean water system of Kota Podomoro Tenjo Housing in Bogor Regency. This research uses methods with primary data collection, secondary data, and data processing with Epanet 2.0 and Excel Application programs. Then an analysis of raw water availability and clean water system planning data was carried out. The results of the analysis of raw water system planning show that the potential raw water of the Cidurian River using flo mate measuring instruments is 14,455 l / s, in stage I there are 829 SR, stage II there are 2737 SR, stage III 4555 SR are served, and the water demand from stage I to stage III reaches 31.63 l / s so that the Cidurian River can be utilized as a source of raw water for clean water services and can meet the clean water needs of Podomoro City Housing Tenjo Bogor Regency only by using 20% of Cidurian River water. The results of the hydraulic calculation analysis of piping using Epanet 2.2 obtained that each node/junction has met the hydraulic criteria.
Seismic Vulnerability Assesment of Plaza Bogor Building in Bogor City Lutfi, Muhamad; Chayati, Nurul; Muliyana, Indra; Insan, Muhammad Khaerul
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.v15i1.19274

Abstract

Plaza Bogor Building is a commercial building that is the center of economic activity that has been established for 28 years, it is important to conduct a structural vulnerability analysis to ensure the strength of the building structure is able to withstand potential earthquakes that can occur again at any time. This study aims to assess the level of vulnerability of the Plaza Bogor Building structure to earthquakes using the Rapid Visual Screening (RVS) method based on FEMA P-154 2015 and testing the quality of concrete using the Hammer Test method, and structural analysis using ETABS v.21 software to evaluate the performance of the Plaza Bogor Building structure against earthquake loads based on performance-based methods. The analysis results show that the final RVS value of the Plaza Bogor Building does not experience damage of 99,874% against earthquakes. All structural elements of the columns, beams, and slabs of the Plaza Bogor Building that have been tested with the Hammer Test get the value of concrete quality on the basement floor column to the fourth floor in the range of 41,55MPa – 57,10MPa, the value of concrete quality on the first floor beam to the fourth floor in the range of 41,61MPa – 51,98MPa, and the value of concrete quality on the first floor slab to the fourth floor in the range of 51,57MPa – 57,10MPa where the value meets the fc' >21MPa standard based on SNI 2847:2019. The results of the analysis of the upper structure of the Plaza Bogor Building against static earthquake loads and dynamic earthquake loads in the ETABS program show that there are eleven out of 906 beams that experience overstress and there are two out of 511 columns that experience overstress, so the safety of structural elements in the Plaza Bogor Building is 99,08% against earthquakes.
Shock Wave Analysis at Signalized Intersections (Case Study of Cikaret–Cibinong Intersection) Rulhendri, Rulhendri; Nopianda, Riky Sanjaya; Alimuddin, Alimuddin
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.v15i1.19346

Abstract

The signalized intersection of the Cikaret - Cibinong highway is one of the signalized intersections in the Cibinong sub-district, Bogor Regency with a road length of 2.4km causing a shock wave event on the road section due to changes in flow values ​​and density that often experience congestion during rush hour, for that a study was conducted to analyze the characteristics of shock waves at the highway intersection to determine the recovery of the queue length caused by increased traffic flow. This study was conducted for 3 days on Monday, Thursday and Sunday, in the morning (06.00 - 09.00), afternoon (10.00 - 12.00), evening (16.00 - 18.00). The characteristics of the shock waves that occur are current, forward formation, front stop, backward formation, forward recovery, backward recovery, moving forward in one direction, delay, maximum queue length, normalization time. Based on the research results, the results of the mathematical relationship calculation between volume, speed and density in the greenshields model to analyze the queue length value using the shock wave value obtained the maximum volume (VM) 521.2483smp/hour, the maximum density Dm of 28.707smp/km and taken the flow condition VA = 300.56smp/hour which experienced a delay of 116 seconds, the queue length (QM) was 244 meters and the normalization time of 189.550 seconds was higher than the duration of the green light which was 52 seconds. This means that when the light changes from green to red, not all vehicles queuing cross the stop line. According to the results of the processing and analysis, the results of the mathematical relationship between volume, speed and density were obtained from the determination coefficient value (R2) using the greenshields model, which is 0.1774.
Dynamic Response of Bridge Decks to Steady State Wind Loads: A CFD Approach Supriyadi, Bambang; Triwiyono, Andreas; Farhan, Muhamad
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.v15i1.19421

Abstract

Indonesia, as an archipelago nation located on the equator, is affected by alternating Asian and Australian monsoon systems throughout the year. The east monsoon spans from April to September, while the west monsoon occurs from October to March. In Samarinda, prevailing southern winds lead to significant fluctuations in speed and direction, impacting the stability of bridge structures. Extreme wind events pose risks to suspension bridges through aerodynamic phenomena like flutter, galloping, and vortex shedding, which impose substantial dynamic loads on the structure.This study focuses on analyzing the dynamic response of bridge decks under steady state wind loads. Daily wind data collected from January 2023 to January 2024 revealed wind speeds of 3, 4, and 5 m/s, with extreme speeds reaching 14 and 20 m/s. Steady state simulations were conducted using the simpleFoam solver in Simscale at these speeds, along with the critical velocity of 8.764 m/s derived from the bridge deck's cross-section. The simulation results provided valuable insights into pressure distributions and lateral displacement on the deck.Findings indicate that lateral displacement at a wind speed of 20 m/s reaches 1.235 m, which exceeds design limits and highlights potential structural vulnerabilities. These results demonstrate the effectiveness of steady state CFD simulations in assessing wind-induced effects on bridge structures and underline the importance of mitigation strategies to ensure stability.
Application of New Empirical Algorithm in Coastal Waters of Padanggalak Beach to Detect Total Suspended Solid Value Astiti, Sagung Putri Chandra; Dharma, I Gusti Bagus Sila; Pariartha, I Putu Gustave Suryanthara; As-Syakur, Abd. Rahman; Arsana, I Gusti Ngurah Kerta
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.v15i1.19633

Abstract

Total Suspended Solid is one of the important indicators in the physical parameters to determine the quality status of the waters studied. In this case, researchers will create a new algorithm to detect TSS values ​​at Padanggalak Beach, where the beach is the estuary of the Ayung Watershed. The creation of the algorithm that has been carried out by several researchers took the case in coastal waters, so that the algorithm will cause a fairly high difference in value when applied to other coastal areas. Coastal areas in each place have different characteristics, where coastal areas are dynamic areas, influenced by various factors including climate, weather, wind direction, ocean currents and characteristics of the use of the surrounding environment. Field data taken in the form of seawater samples were then tested in the laboratory to produce TSS concentration values ​​at each sample point. Field observations for TSS sampling in the coastal waters of the Ayung DAS estuary located at Padanggalak Beach were carried out on Wednesday, August 14, 2024 at 08.00 - 10.30 WITA. The form of the new algorithm equation produced along with its correlation level is TSS = -25.096 x (B6/B11) + 42.415, for TSS estimation at Padanggalak Beach. Based on the results of the analysis of the determination coefficient of the New Empirical TSS Algorithm with Insitu TSS, the R2 result was 0.6812. This shows that the results of in situ data and the results of satellite image processing using the New Empirical Algorithm are considered to have a strong correlation relationship, which means that the TSS results from the empirical algorithm are quite in accordance with the TSS results in the field at the Ayung DAS Estuary (Padanggalak Beach).
Evaluation of Railway Infrastructure on Track Quality Index (TQI) Based Track Quality (Cross of Mandai - Garongkong) 2024 Wibowo, Arief Hadi; Desy, Natsar; Gusty, Sri
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.v15i1.19642

Abstract

Infrastructure quality greatly affects the speed, comfort, and safety of train travel. High speed can cause damage to the railroad track which can cause a decrease in the TQI value and increase the risk of train accidents. This study aims to analyze the factors influencing train speed, analyze the speed of railway facilities on track quality based on Track Quality Index, and analyze optimization strategies to keep the Track Quality Index (TQI) within the operating speed threshold in 2024. The method used in this research is mix method. The results showed that the factors affecting train speed across Mandai-Garongkong are the condition of the rail line and Track Quality Index (TQI), track geometry and rail infrastructure, characteristics of rolling stock, external environment, and operational management and speed regulation, so that the optimization strategy needed to enable optimal operational speed is the implementation of preventive and corrective maintenance strategies, real-time TQI monitoring with observation technology, and operational management based on observation results. Based on the calculation of the Track Quality Index (TQI) value on each track plot, it is found that the average TQI value is above 10, while the average operational speed is above 30 km/h, although the average TQI value is above 10, the operational speed can still be maintained above 30 km/h. It is recommended to immediately bring in facilities with speeds capable of maximizing the existing TQI value on the South Sulawesi crossing.
The Evaluation of Palasari Reservoir Water Balance for Palasari Irrigation Area by Using RIBASIM Lelyana, Novia; Arsana, I Gusti Ngurah Kerta; Pariartha, I Putu Gustave Suryantara
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.v15i1.19650

Abstract

One of the attempts to manage water resources is to build dams. One of the large dams in Indonesia, the Palasari Dam, which is located in Bali Province, was built in 1987 - 1989. The utilization purpose of the Palasari Dam is to irrigate the planned Palasari Irrigation Area in the amount of 1,300 Ha. However, the Palasari Reservoir challenges sedimentation and a lowering of storage water level, especially during the drought. This condition inflicts disruption of water availability. In the face of scarcity of water resources, it is necessary to explore water availability for efficient and effective distribution. In optimizing reservoirs, operational simulation analysis to determine the reliability of reservoir operations can use RIBASIM (River Basin Simulation) software by evaluating the results of the composition and distribution of water discharge. This research aims to evaluate the irrigation inflow released by the operation of the Palasari Reservoir to serve the Palasari Irrigation Area. Calculations for irrigation water demand in the Palasari Irrigation Area were carried out by the existing global crop plan, as well as modeling simulations with six rice field plots that were irrigated directly by the Palasari Reservoir using RIBASIM. Based on the results of model simulations, the existing discharge cannot fulfill water demands in the Palasari Irrigation Area. Hereafter, with the simulated annual average irrigation water demand of the Palasari Irrigation Area of 9.915 Mcm (0.314 m3/s), it still runs into a water shortage of 4.049 Mcm (0.128 m3/s) with a shortage rate of 40.76%.
Analysis and Design of Solar Power Plants as Energy Source for Green Hydrogen Production at PLTU Banten 2 Labuan Permana, Indra Setia; Devianto, Hary; Gusnawan, Pri Januar; Nainggolan, Irwan Firmanto
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.v15i1.20002

Abstract

Climate change is a global challenge that demands collective efforts, including from Indonesia, which aims to reduce greenhouse gas emissions by 31.89% through domestic efforts and 43.20% with international support. As part of a state-owned company, PLN contributes to this effort by integrating hydrogen business development into its strategic program. PLTU Banten 2 Labuan has a hydrogen plant with the potential to produce excess hydrogen for economic use. This research simulates three hydrogen production schemes to optimize performance and cost efficiency. The analysis reveals significant differences in terms of CAPEX, OPEX, LCOH, NPV, PI, IRR, DPP, and carbon emissions. Scheme 4, despite having the lowest emissions and OPEX, has very high CAPEX, with the highest LCOH of 7.41 USD/kg and poor financial performance (negative NPV of -217,908.33 USD, IRR of 3.62%, and PI of 0.59). Scheme 2, with the lowest LCOH of 3.79 USD/kg, is attractive but results in high carbon emissions (318,864 kg CO₂e). Scheme 5, with moderate CAPEX and LCOH of 4.03 USD/kg, performs best overall, showing positive financial indicators NPV of 163,593.97 USD, PI of 3.14, IRR of 32.62%, and a short DPP of 3.2 years. Scheme 5 is the most optimal and recommended for further implementation.
Information System for Managing Goods and Web-Based Sales Transactions in Retail Businesses Using the Waterfall Method Firdaus, Muhammad Ariq; Suharso, Wildan
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.v15i1.20044

Abstract

The rapid development of information technology has created both opportunities and challenges for businesses, especially in the retail sector. In an effort to improve operational efficiency and service quality, information systems are an important requirement that cannot be ignored. Queen Cell and Queen Baby Shop, two retail business units operating in Tanggamus Regency, still run inventory management and sales transactions manually. The process often causes various problems such as delays in recording, stock mismatches, and financial report errors. To overcome these problems, this research designs and implements a web-based information system specifically designed for the needs of managing goods and sales transactions. The system development methodology uses the SDLC waterfall model approach because it is considered suitable for project needs with clear and stable specifications from the start. The system developed has two types of users, namely ad- min and employees, with the main features being product data management, transaction recording, and sales report processing. The imple- mentation results show that the system can run as expected and is able to significantly improve work efficiency and data accuracy. In addition, the system supports multi-platform access through the web so that it is flexible to use on various devices. It is hoped that this in- formation system can be a sustainable solution for small to medium scale retailers in facing the challenges of digitalization.
Soil Improvement Using Bamboo Leaf Ash and Cement on Triaxial UU Testing Azana, Shafira Yuli; Rahayu, Wiwik; Sagitaningrum, Fatiyah Hakim; Kabidiyono, Era Agita
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.v15i1.20727

Abstract

Soft soils, particularly those classified as low-plasticity silt (ML) according to ASTM D2487, pose considerable challenges in geotechnical engineering due to their low shear strength, high compressibility, and limited bearing capacity. This study evaluates the effectiveness of bamboo leaf ash (BLA), Portland Composite Cement, and their combination as stabilizing agents for ML-type soft soil. Laboratory investigations were conducted to assess changes in physical and mechanical properties, including Atterberg limits, specific gravity, compaction characteristics, and unconsolidated undrained (UU) triaxial shear strength. Four stabilization mixtures were analysed: untreated soil, soil with 10% BLA, soil with 5% cement, and a mixture of soil with 10% BLA and 5% cement. The results indicate that BLA alone enhances the internal friction angle from 11.03° to 38.84°, primarily through physical densification, but reduces cohesion from 64.49 kPa to 46.12 kPa. Cement treatment increases both cohesion 55.38 kPa and the friction angle 49.16° due to hydration and the formation of a cementitious bond. The combination of 10% BLA and 5% cement yielded the highest cohesion 102.59 kPa and a friction angle of 31.79°, highlighting the synergistic effect of pozzolanic reactions between reactive silica in BLA and calcium compounds from cement hydration. The study concludes that the BLA–cement mixture significantly improves the mechanical behaviour of soft silty soil, offering a sustainable and effective alternative to conventional soil stabilization methods, particularly when supported by controlled parameters such as ash fineness, burning temperature, and curing duration.

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