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Anita Setyowati Srie Gunarti
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anitassgunarti@gmail.com
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+6281323206332
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Jl. Cut Meutia No. 83 Bekasi
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INDONESIA
BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
ISSN : 23025891     EISSN : 25793187     DOI : https://doi.org/10.33558/bentang
Core Subject : Engineering,
BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil is theoritical and applied Civil Engineering journal for scientific publication issued twice in every volume (January and July). First published in January 2013, already indexed by Dimensions, Google Scholar, Base, Garuda, and Sinta. BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil is the journal open access. BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil p-ISSN: 2302-5891, e-ISSN: 2579-3187 is a peer-reviewed, scientific journal published by Universitas Islam 45 Bekasi. FOCUS & SCOPE: Structural Engineering Construction Engineering & Management Geotechnical Engineering Transportation Engineering Water Resources Engineering
Articles 452 Documents
Comparison of ET₀ Estimation Methods in a Humid Tropical Region: The Kuranji Catchment, Indonesia Edwina Zainal; Zufrimar Zufrimar; Ridho Prananda; Suratni Afrianti
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11066

Abstract

Many studies have evaluated various evapotranspiration (ET₀) estimation methods globally; however, it is necessary to assess how accurately these methods can function in tropical catchment area (DAS), especially in areas with limited data, such as the Kuranji catchment in Padang, Indonesia. This study aims to the performance of four ET₀ estimation methods—FAO-56 Penman-Monteith (PM), Hargreaves-Samani, Priestley-Taylor, and MOD16A2 satellite-derived ET₀—under varying data constraints typical of humid tropical environments. Using ground observations from BMKG’s Padang station, ERA5-Land reanalysis, and streamflow records from the Kuranji weir, we compute daily ET₀ (2015–2022) and assess impacts on hydrological modeling. Results show that while FAO-56 PM remains the most accurate (MAE = 0.0 mm/day, NSE = 0.82), Priestley-Taylor performs best among simplified methods (MAE = 0.3 mm/day, NSE = 0.79) when radiation data are available. Hargreaves-Samani overestimates ET₀ by 12–14% due to humidity neglect, while MOD16A2 exhibits higher uncertainty (±0.4 mm/day) from cloud contamination. This study recommends hybrid approaches combining ground and reanalysis data to improve accuracy in data-scarce tropical catchments, supporting climate-resilient water management in Padang and similar regions.
Comparative Study of Equivalent Static Analysis and Dynamic Response Spectrum Analysis on 5-Storey Mall Building in Magelang Sutantra Hartono; Yosafat Aji Pranata
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11076

Abstract

The Aloon-Aloon Mall Magelang is a five-story building located in an earthquake-prone zone due to the meeting of the Eurasian and Indo-Australian Plates. This condition requires a structural design that meets earthquake resistance standards. However, there is no specific study related to the seismic response of the building based on local conditions. Therefore, this study is important to evaluate the performance of structures against earthquake loads in order to improve safety and reduce potential losses. Earthquake-resistant buildings are buildings that are designed and constructed with the aim of minimizing damage from earthquakes. This research aims to determine the performance of structures against earthquake loads based on SNI 1726:2019 regulations. The evaluation process is carried out with 3-dimensional modeling of buildings using ETABS software. This research analyzes the seismic response of a 5-storey mall building in Magelang City using the equivalent static analysis method and spectrum response. Structural modeling was conducted using ETABS and SAP2000, focusing on the deformation and internal forces in beams and columns due to earthquake loads. The analysis results based on both static equivalent and spectrum response programs were conducted to compare the two methods used. Based on the analysis, the response spectrum analysis resulted in a larger dislacement in the x-direction of 29.85 mm compared to the equivalent static analysis of 24.95 mm. Magelang Mall is stable to the earthquake loads that occur and there is no need to repair the structure.
Analisis Perkuatan Jalan dan Lereng Menggunakan Shearkey dan Soil Nailing Pada Program PLAXIS 2D Selvia Merinda; Masdar Helmi; Andius Dasa Putra; Mohammad. Isneini; Vera Agustriana Noorhidana
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11211

Abstract

Indonesia has diverse geological and geographical conditions, with many hilly and sloping areas utilized as roadways. In Lampung Province, there is a national road connecting Liwa City and Padang Tambak that passes through hilly terrain and several landslide-prone areas. This study aims to analyze the landslide potential and design slope and road reinforcement using shear keys, soil nailing, and shotcrete through the PLAXIS 2D program and manual analysis methods in accordance with SNI 8460:2017, considering both static and seismic conditions. The PLAXIS 2D analysis results indicate that the existing road and slope have a landslide potential with a safety factor of 1.474 < 1.5 (minimum standard SF), requiring reinforcement to improve stability and meet the minimum safety standard. Based on the study results, the most suitable reinforcement considering the existing conditions includes the use of shear keys, soil nailing, and shotcrete. The reinforcement modeling using PLAXIS 2D shows a global safety factor of 1.787 > 1.5 for static conditions and 1.217 > 1.1 for seismic conditions. This design has proven effective in enhancing slope stability, both through manual and numerical analysis. This research is expected to serve as a reference for landslide risk mitigation in the study area and other similar regions, thereby reducing risks and improving public safety.
Model of Landslide Mitigation using Analytical Hierarchy Process (AHP) in Kubang Tangah Area, Sawahlunto, West Sumatra Farid Akmal; Andriani Andriani; Bayu Martanto Adji
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11327

Abstract

The Kubang Tangah area in Sawahlunto, West Sumatra, has a high risk of landslides due to steep topography, high rainfall, and human activities that affect slope stability. This study aims to determine effective landslide mitigation strategies using the Analytical Hierarchy Process (AHP) method involving ten disaster experts. The three stages of mitigation analyzed include before, during, and after the disaster. The results of the investigation showed that several slope points had safety factor values below 1.25, indicating that the research location was prone to landslides. The AHP analysis produced mitigation priority weights: pre-disaster mitigation (0.41), during-disaster mitigation (0.39), and post-disaster mitigation (0.20). The main strategies prioritized in the pre-disaster stage were reforestation, construction of slope drainage systems, and determination of landslide-prone zones in spatial planning. This approach provides priority recommendations to support more targeted and efficient mitigation planning in Kubang Tangah. For the total weight, the highest mitigation value was obtained, namely, victim evacuation and repair of facilities and infrastructure (12.519), creation of evacuation routes (11.934), and determination of assembly points (10.413).
Integrated Urban Drainage Analysis for Flood Mitigation Using HEC-RAS 6.0: A Case Study of Kaliakah Village, Jembrana Regency Tri Hayatining Pamungkas; Ni Kadek Astariani; Putu Doddy Heka Ardana; I Kadek Oky Wahyudi Putra; I Wayan Diasa
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11557

Abstract

Kaliakah Village in Jembrana Regency faces seasonal flooding due to land use changes and inadequate drainage systems. Inundation frequently occurs, especially in the Cempaka Road area, as surface runoff and channel sedimentation increase. This study aims to evaluate the existing drainage channel's storage capacity and redesign its cross-section using HEC-RAS 6.0 software to accommodate the planned flood discharge for a 5-year return period. Hydrological analysis was conducted based on rainfall data with discharge calculations using the Rational method, while hydraulic evaluation was conducted through HEC-RAS modeling. The results showed that the planned flood discharge of 0.46 m³/second with a concentration time of 0.38 hours could not be accommodated by the existing channel, specifically at STA 0+100–0+300 which experienced overflow. Therefore, a redesign of the channel was carried out using a 60x80x120 cm U-ditch, which was proven to be able to accommodate the discharge safely and efficiently in an effort to mitigate regional flooding.
the Optimization of Plastiment 83 AM Dosage to Improve the Strength and Microstructure of Normal Concrete Supriyanto; Chatarina Niken; Suripto Dwi Yuwono; Suyadi Suyadi; Mohammad. Isneini
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11657

Abstract

Presently, the construction project is encountering numerous issues, including the concrete quality deviating from specifications due to the extended distance from the Batching Plant to the project site, as well as an excessive use of admixtures intended to prevent the concrete from freezing initially. This study aims to optimize the dose of type D admixture, namely Plastiment 83 AM, in increasing the compressive strength and normal concrete microstructure. Concrete was tested with variations in admixture dosage (0%, 0.15%, 0.25%, 0.35%, and 0.40%) as well as mixing time (15 minutes, 2 hours, 4 hours, 6 hours, and more than 6 hours). The tests included compressive strength analysis at 7, 14, 28, and 56 days of age, as well as microstructure analysis using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The results showed that the optimal admixture dose of 0.15% in the first 2 hours and 0.10% in the next 2 hours produced the highest compressive strength of 19.84 MPa at 56 days of age, an increase of 17% compared to control concrete without admixtures which only reached 16.96 MPa. This value also exceeded the target value of 18.68 MPa. SEM analysis showed that the optimum dose caused a denser concrete microstructure with evenly distributed pores, and FTIR showed an increase in the intensity of Si-O peak, signifying better Calcium Silicate Hydrate (C-S-H) gel formation. On the other hand, overdose of admixture (0.40%) and more than 6 hours of mixing time resulted in segregation of the material, high porosity, and decrease in compressive strength by as much as 12.99 MPa (decrease by 23% compared to control concrete). A dosage of 0.15% of Plastiment 83 AM during the first 2 hours and 0.10% during the next 2 hours is recommended in this study to achieve optimum concrete performance.
Stabilisasi Pasir Menggunakan Limbah Cair Tahu untuk Meningkatkan Faktor Daya Dukung Tiang Nur Rohmatin; Agata Iwan Candra
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11671

Abstract

Loose sand has limited capacity to support structural loads due to weak interparticle interlocking and its non-cohesive behavior. This study aimed to evaluate the effect of stabilization using tofu wastewater on the improvement of point resistance and bearing capacity factor of small-scale pile foundations in loose sand. The testing was conducted using a pile-driving test under two conditions: untreated sand with water as the control and treated sand with tofu wastewater. The results showed that the treatment with tofu wastewater increased the point resistance by up to 4.6 times, yielding a maximum bearing capacity factor of 951.56, compared to 228.92 in the control condition. Statistical analysis indicated a highly significant difference between the two treatments (p-value = 2.2 × 10⁻²⁰). The empirical correction to the theoretical Meyerhof value ranged from 3.8 to 5.4, indicating that using conventional bearing capacity factor values without adjustment may lead to inaccurate estimation of pile bearing capacity. These findings demonstrate that tofu wastewater effectively improves the mechanical behavior of loose sand by inducing calcium carbonate precipitation through enzymatic activity, and it has potential as an environmentally friendly and economical soil improvement method.
Analisa Hasil Pembacaan Tekanan Air Pori dan Rembesan terhadap Keamanan Bendungan (Studi Kasus : Bendungan Bendo) Dea Putri Arifah; Dyah Ari Wulandari; Hari Nugroho
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11682

Abstract

Embankment dams are susceptible to seepage problems that can trigger internal erosion and structural failure. This study analyzes the relationship between reservoir water level elevation and seepage behavior of Bendo Dam using three years of continuous monitoring data (December 2021–November 2024). The analysis integrates pore water pressure measurements and seepage discharge records at two representative operational scenarios: elevations +196.82 m and +220.62 m. Using second-order polynomial regression, the study calculates hydraulic gradient (i) and seepage index (QI) according to ICOLD and SNI 8065:2016 guidelines, and maps the phreatic line. Results show QI = 0.03 (at reservoir elevation +196.82 m) and QI = 0.01 (at reservoir elevation +220.62 m), both substantially below the critical threshold (QI ≤ 1), indicating safe seepage conditions. The phreatic line consistently remains within the filter zone and positioned lower than Dupuit–Forchheimer theoretical predictions, confirming the effectiveness of the clay core in controlling seepage. Average hydraulic gradients (0.70 and 1.43) at low and normal reservoir elevations remain below the critical threshold (2.5–3.0). High regression coefficients (R² ≈ 1) demonstrate stable seepage behavior with no evidence of internal erosion. In conclusion, Bendo Dam operates safely under current conditions. To ensure long-term safety assurance, continued monitoring and model refinement remain essential.
Evaluasi Kondisi Geologi dan Efektivitas Grouting Fondasi Bendungan Bagong Muhammad Rizqi Uwais Al Qorni; Kresno Wikan Sadono; Sukamta Sukamta
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11683

Abstract

The foundation of Bagong Dam in Trenggalek Regency faces geological challenges characterized by lithological heterogeneity with high permeability (0.03-106.70 Lugeon) and variable rock mass strength. This study aims to evaluate the influence of geological characteristics on grouting performance by integrating permeability classification and multi-parameter rock quality assessment. The research utilized grouting trial data from three main zones (Right Abutment, River Bed, and Left Abutment) employing methods that include Lugeon permeability testing, RQD, core sampling, and UCS. Grouting effectiveness was evaluated using the Quíñones-Rozo (2010) classification system and RQD regression analysis. Results demonstrated a reduction in permeability from Medium-High class to Very Low-Low following grouting, with effectiveness values of 94.8% (Right Abutment), 90.79% (Left Abutment), and 78.91% (River Bed). Analysis revealed three depth-dependent response zones: shallow zone (5-15 m) with high variability but good efficiency, transition zone (15-25 m) with consistent performance, and deep zone (25-40 m) with high effectiveness. Correlation analysis between RQD and grouting effectiveness yielded R² = 0.254 (Effectiveness = 0.408·RQD + 61.30), indicating that RQD alone is insufficient as a standalone predictor, corroborated by the PH18 anomaly (RQD 35%, effectiveness 95.65%) which demonstrates the necessity of multi-parameter integration. These findings prove that integrated permeability assessment and rock quality evaluation provide a more reliable basis for assessing grouting performance compared to conventional approaches using a single parameter.
Seepage and Pore Pressure Response to Reservoir Level Fluctuations during the Impounding Phase of Karian Dam Fauji Rohman; Sri Sangkawati Sachro; Hari Nugroho
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 14 No 1 (2026): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (January 2026)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v14i1.11688

Abstract

Seepage-induced internal erosion and piping account for approximately 43% of embankment dam failures globally, with risk significantly elevated during the initial impounding phase when rapid reservoir level rise amplifies hydraulic gradient in the foundation. This hazard is particularly critical for dams with halloysite-rich clay cores constructed over pyroclastic rocks such as lapilli tuff, where the combination of high plasticity and heterogeneous permeability creates complex seepage pathways and delayed pore pressure response. This research aims to evaluate the seepage and pore water pressure responses to reservoir water level fluctuations during the initial impounding of Karian Dam (September 2023–May 2025) using 10 vibrating-wire piezometers and 1 V-notch weir for comprehensive field data collection. Data were analyzed with rigorous preprocessing to eliminate rainfall effects and isolate dam-driven seepage. Linear regression revealed a strong relationship between increasing reservoir elevation and seepage discharge: y = 0.2259x − 7.054 (R² = 0.9089), with seepage increasing from 3.3 l/s (elevation 46 m) to 8.3 l/s (elevation 67.97 m). Maximum Seepage Index 0.084 at elevation 70.85 m remained well below the safety threshold (QI < 1.0), confirming controlled piping risk. Upstream pore pressure substantially exceeded downstream values, indicating effective core hydraulic dissipation. The phreatic surface remained entirely within the dam body, confirming appropriate initial design. Integration of systematic multi-instrument monitoring, real-time regression analysis, and Seepage Index evaluation during the early filling phase represents a methodological advancement in Indonesian dam monitoring and supports the development of SCADA-based early detection systems for dam safety management in Indonesia.

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