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Dedi Purwanto Indra Kusuma
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RESWARA: Jurnal Riset Ilmu Teknik
Published by Lembaga Penelitian dan Pendidikan (LPP) Kalibra
ISSN : -     EISSN : 30259444     DOI : https://doi.org/10.70716/reswara
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation
RESWARA: Jurnal Riset Ilmu Teknik is a leading scholarly platform that examines the strategic role of engineering disciplines in advancing the Sustainable Development Goals (SDGs). The journal is dedicated to publishing recent research, innovations, and engineering solutions that support sustainable development. The editorial board welcomes manuscripts based on theoretical frameworks and empirical research. The journal scope covers scientific knowledge and research-based information, including applied research and recent developments in engineering research and development. The primary focus includes Civil Engineering and Spatial Planning, Industrial Engineering, Electrical Engineering and Informatics, Earth Science Technology, and Naval Architecture. All manuscripts published in RESWARA undergo a double-blind peer review process. The final decision on manuscript acceptance rests with the Editorial Board, based on recommendations from independent peer reviewers.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 157 Documents
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Occupational Safety and Health Risk Assessment Using the Five-Step HIRADC Approach in Landfill Waste Management Operations Sri Rahmaniah; Indra Komara; Achmad Chusnun Ni'am; Yuli Panca Asmara
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.759

Abstract

Landfill operations involve interconnected physical, chemical, biological, ergonomic, and mechanical hazards associated with waste transportation, unloading, heavy-equipment operation, waste spreading and compaction, leachate treatment, landfill-gas management, and vector and odor control. This study aimed to identify occupational hazards, assess their risk levels, and develop an integrated control and monitoring framework for operational activities at Wonokerto Landfill, Pasuruan Regency, Indonesia. A descriptive observational design was applied using an extended Five-Step Hazard Identification, Risk Assessment, and Determining Control (HIRADC) framework covering hazard and exposed-person identification, risk assessment based on probability and severity, control selection according to the hierarchy of controls, assignment of responsibilities, and performance monitoring. A total of 143 hazards were identified across ten operational stages, comprising 4 (2.8%) low-risk, 43 (30.1%) moderate-risk, 81 (56.6%) high-risk, and 15 (10.5%) very-high-risk hazards. The most prevalent mechanisms were transportation and vehicle accidents (26.6%), heavy-equipment interactions (17.5%), chemical and gas exposure (14.0%), and slips, trips, and falls (12.6%). Very-high-risk hazards were concentrated in waste unloading and transportation, waste spreading and compaction, landfill-gas management, and travel to waste-collection locations. The findings indicate that safety management should prioritize engineering and physical-separation controls, supported by administrative measures, emergency preparedness, competent supervision, and appropriate personal protective equipment. Integrating risk prioritization, Bow-Tie Analysis, responsibility assignment, and performance indicators can strengthen control implementation, verification, and continual improvement.
Optimalisasi Lean-Green Construction Untuk Minimasi Jejak Karbon pada Proyek Overpass Kota Medan Mei Brilian Harefa; Jimmi Roy Tampubolon; Ferdinand Sinuhaji
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.770

Abstract

Urban overpass projects require substantial volumes of concrete, reinforcing steel, precast components, heavy equipment, and logistics. When workflow is poorly controlled, waiting, repeated movement, rework, and excess material increase resource consumption and carbon emissions. This study quantifies the emission baseline and determines process-improvement priorities by integrating Lean Construction and Green Construction. A mixed case-study design was applied using MC-0 quantities, an A1-A5 Life Cycle Assessment boundary, Value Stream Mapping, the Waste Assessment Model, a waste-emission source matrix, and engineering expert consensus. The project inventory comprises 1,448.07 m³ of concrete, 171,713.30 kg of reinforcing steel, and 18 girders. A1-A3 emissions amount to 324.35 tCO₂e for concrete and 285.04 tCO₂e for reinforcing steel. Including girders, A4 transportation, and A5 construction activities raises the project baseline to 806.78 tCO₂e. The current-state VSM records a total lead time of 1,253.68 minutes and a process cycle efficiency of 45.32%. The future state reduces lead time to 1,068.55 minutes and increases efficiency to 53.17%. WAM ranks waiting as the dominant waste, followed by transportation and defects/rework. The expert-consensus scenario targets reductions of 40% in rework, 55% in equipment idle time, 10% in inefficient transportation, and 45% in material waste, avoiding 19.25 tCO₂e. The findings demonstrate that carbon management in infrastructure construction must combine low-carbon material decisions with workflow stabilisation, rework prevention, idle-time reduction, and logistics synchronisation.
Evaluasi Faktor Penentu Kelayakan Huni Rumah Pascabencana Hidrometeorologi di Kabupaten Aceh Barat Hilma Erliana; Ade Dwinta; Cut Liliiza Yusra; Raina Parmitalia Dinda
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.780

Abstract

Hydrometeorological disasters that struck West Aceh Regency at the end of 2025 caused extensive housing damage, highlighting the need to identify the factors influencing housing habitability as a basis for rehabilitation and reconstruction priorities. This study investigated the influence of economic conditions, disaster vulnerability, housing physical condition, and social conditions on the habitability of housing following hydrometeorological disasters. A total of 187 households were selected using a purposive-proportional sampling technique. Data were collected through questionnaires and field observations and analyzed using multiple linear regression. The results showed that the regression model explained 78.2% of the variance in housing habitability (R² = 0.782), with all independent variables having a significant simultaneous effect on housing habitability. Partially, the physical condition of the house was identified as the most influential factor, followed by disaster vulnerability, while economic and social conditions did not show significant effects. These findings indicate that the level of physical building damage and the vulnerability of occupants are the primary determinants of housing habitability in post-hydrometeorological disaster areas. This study proposes an integrated housing habitability evaluation model that combines building physical conditions and disaster vulnerability to support more objective and evidence-based housing rehabilitation and reconstruction prioritization.
The Influence of Work Safety Culture on The Performance of Heavy Equipment Operators in The Heavy Equipment Rental Industry at PT. Buana Orbit Sejahtera Rikson Mitro Jaya Pasaribu; Hery Irwan
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.788

Abstract

The heavy equipment rental industry operates in high-risk environments characterized by dynamic hazards and complex machinery management. Although occupational safety culture is critical in high-hazard sectors, empirical evidence focusing on heavy equipment operators in the rental industry remains limited. This study aims to quantitatively analyze the influence of occupational safety culture on the work performance of heavy equipment operators at PT. Buana Orbit Sejahtera. An explanatory quantitative survey was conducted among 50 heavy equipment operators selected through purposive sampling based on active employment status, a minimum of one year of operational experience, and completion of mandatory safety induction. Data were collected using structured five-point Likert-scale questionnaires. Data analysis included Pearson product-moment validity testing, Cronbach’s Alpha reliability testing, classical assumption tests using Shapiro–Wilk normality and Glejser heteroscedasticity tests, simple linear regression, hypothesis testing, and coefficient of determination analysis. The results indicated that the research instruments were valid and reliable, while the regression model satisfied the classical assumptions. Simple linear regression demonstrated that occupational safety culture had a positive and statistically significant effect on operator performance. The coefficient of determination (R²) was 0.656, indicating that 65.6% of the variance in operator performance was explained by occupational safety culture, while 34.4% was attributable to other factors. In conclusion, occupational safety culture serves not only as an accident-prevention mechanism but also as a strategic determinant of operator performance, operational discipline, and workforce productivity in the heavy equipment rental industry.
Comparison of Speedometer Test Results between Static and Dynamic Methods in Two-Wheeled Motorcycle Type Approval I Made Cahyana Wiryanata; Aris Budi Sulistyo; I Gusti Bagus Eka Nitiyasa; I Wayan Yogi Arta
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.795

Abstract

Vehicle speedometer testing is an important component of vehicle type approval to ensure that the indicated speed is evaluated using standardized testing procedures. At the Indonesian Vehicle Testing and Certification Center (BPLJSKB), speedometer testing can be conducted using a static method with a speedometer tester or a dynamic method based on a GPS/GLONASS antenna. The different measurement environments and principles may produce variations in the resulting speedometer values. This study aimed to compare speedometer test results obtained using static and dynamic methods for a two-wheeled motorcycle under controlled testing conditions. A quantitative comparative method with an experimental approach was employed. Each testing method was repeated 25 times at reference speeds of 40 km/h and 80 km/h, resulting in 100 observations. The data were analyzed using descriptive statistics, normality and homogeneity tests, an Independent Samples t-test, and Cohen’s d effect size analysis. The results showed no statistically significant difference between the static and dynamic methods, with p-values of 0.15 at 40 km/h and 0.10 at 80 km/h. The mean differences were 0.13 km/h and −0.17 km/h, respectively, while the absolute Cohen’s d values were 0.41 and 0.47. These findings indicate statistically comparable results under the experimental conditions, although they do not establish full interchangeability between the two methods.
Rooftop Water-Tank Operational Mass Effect on Seismic Compliance of a 7-Story RC Special Moment Frame Florindo da Costa Martins; Taufiqurrohman Taufiqurrohman; Sergio Gandhi Lourdes Belo; Cosme Soares Fraga
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.838

Abstract

Rooftop water tanks are near-universal in Indonesian multi-story buildings, yet the mass of stored water is frequently omitted from the seismic mass definition applied in structural design. Whether this omission is consequential depends on the seismic hazard of the site, and hazard across the Indonesian archipelago varies widely between regions. This study examines how the inclusion of rooftop operational water mass alters the code-compliance status of a fixed 7-story reinforced concrete Special Moment Resisting Frame (SMRF) when assessed at three locations of increasing hazard: Yogyakarta, Kupang, and Atambua. A three-dimensional model was constructed in ETABS Version 21 and subjected to modal response spectrum analysis in accordance with SNI 1726:2019, with output post-processed in MATLAB R2023b. Two operational states were compared: an empty tank (baseline) and a full 18,000 kg tank (governing condition). Design base shear increased by 13.8%, 14.6%, and 15.9% at Yogyakarta, Kupang, and Atambua, respectively. Maximum inter-story drift ratios rose from 1.65% to 1.95% at Yogyakarta, from 2.10% to 2.55% at Kupang, and from 2.40% to 2.85% at Atambua, against an allowable limit of 2.00%. The most consequential finding is that drift exceedances in Kupang and Atambua pre-exist the full-tank condition; operational mass enlarges an existing deficit rather than creating one. Operational mass acts as an aggravating factor in high-hazard zones. Furthermore, while element capacity checks were beyond the scope of this linear analysis, the systemic failure to satisfy drift limits indicates a fundamental stiffness deficiency, strongly suggesting that member proportioning transferred from moderate-hazard Java is inadequate for eastern Indonesia.
Residual Structural Performance of Spun Pile-Supported Wharves under Long-Term Marine Corrosion: A Multi-Parameter Assessment Kohar Yudoprasetyo; Afif Navir Refani
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.856

Abstract

Long-term marine corrosion can progressively reduce the strength, stiffness, and deformation capacity of prestressed-concrete spun piles, but individual material or global-response parameters do not by themselves provide a complete condition assessment of aging pile-supported wharves. This study develops a multi-parameter residual-performance assessment by re-analyzing previously established corrosion-dependent material models and nonlinear pushover results for two representative wharf configurations: PSW-A with vertical Ø700 mm spun piles and PSW-B with vertical and batter Ø600 mm spun piles. Three exposure states were considered: 0, 50, and 75 years, corresponding to corrosion degrees of 0, 12.20, and 18.56%. At 75 years, the reported cover-concrete strength, core-concrete strength, and PC-bar yield strength retained approximately 40.21%, 82.87%, and 91.64% of their initial values. The effective pile stiffness factors decreased to 0.789-0.799, while lateral capacity decreased by approximately 25-28%. Ductility retention was only 0.667 for PSW-A and 0.660 for PSW-B. The comparison shows that the batter-pile system can retain relatively high peak-displacement and stiffness ratios while still experiencing greater lateral-capacity loss and strain concentration. The proposed normalized assessment provides a practical screening framework for inspection and maintenance prioritization, while remaining a deterministic, model-based preliminary approach requiring field validation.
Comparative Structural Integrity Assessment of Buried Gas Pipelines at Road Crossings Based API RP 1102 for Minimum Safe Burial Depth Hary Munandar; Larasati Rizky Putri; Tono Sukarnoto; Sentot Novianto; Azka Aulia
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.859

Abstract

The structural integrity of buried gas pipelines at road crossings is critically affected by external vehicular loads, particularly under shallow burial conditions. Existing studies predominantly rely on single analytical approaches, which may not adequately capture the complex soil pipe interaction and load transfer mechanisms. This study addresses this gap by proposing a comparative multi method framework to determine the minimum safe burial depth of pipelines. A 12 inch gas pipeline is evaluated using three complementary approaches, API RP 1102, CEPA analytical method, and three dimensional Finite Element Analysis (FEA). The analysis integrates realistic operational parameters, soil properties, and heavy vehicular loads up to 50 tons, with structural performance assessed against ASME B31.8 allowable stress criteria. Results reveal a consistent attenuation of stress with increasing burial depth across all methods. The CEPA method provides conservative predictions, indicating a maximum stress ratio of 69.9% SMYS at 0.7 m, while FEA captures more realistic stress redistribution, yielding lower stress ratios (59.55%). Notably, depths below 0.7 m exhibit significantly higher stress levels, approaching critical limits, particularly under combined loading scenarios. This study establishes 0.7 m as the minimum safe burial depth, validated through multi method agreement. Furthermore, it demonstrates that integrating analytical and numerical approaches enhances reliability in pipeline design. For shallow installations, structural protection systems are essential to mitigate load induced stress and vibration.
Strength Analysis of a 6-Inch Gas Pipeline Under Deflection Using ASME B31.8 Strain-Based Design: A Case Study at KP.03+500 Hary Munandar; Larasati Rizky Putri; Tono Sukarnoto; Sentot Novianto; Azka Aulia
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.861

Abstract

Natural gas transmission pipelines are susceptible to deflection due to ground settlement, heavy traffic loads, and surrounding construction activities. This study evaluates the structural response of a 6-inch API 5L X52 gas pipeline experiencing a vertical deflection of 9 cm over a chord length of 370 cm at KP.03+500. The assessment uses the sagitta-based radius of curvature together with a strain-based framework. The revised calculation separates longitudinal bending strain from extensional strain. The measured geometry gives a radius of curvature of 1905.9 cm and a deflection angle of 11.12°. The longitudinal bending strain is 0.0186%, the extensional strain is 0.0296%, and the combined longitudinal strain is 0.0482%, below the material yield strain of 0.1760% and the adopted 0.25% normal-operation criterion. The elastic bending stress is 37.9 MPa, while the hoop stress due to MAOP is 36.77 MPa. Sensitivity analysis indicates that the yield-strain threshold is reached at approximately 19.3 cm and the 0.25% strain criterion at approximately 23.5 cm. The measured 9 cm deflection therefore retains a calculated yield-strain margin of approximately 10.3 cm. The assessment provides an analytical screening framework for field integrity evaluation while recognizing limitations associated with single-point measurement and simplified pipe-soil interaction.
Numerical Validation of the Stress-Strain Curve of JIS SM490 Steel in the Strain Hardening Range Using Finite Elements Resky Ahmad; Data Iranata; Aniendhita Rizki Amalia
RESWARA: Jurnal Riset Ilmu Teknik Vol. 4 No. 4 (2026): RESWARA: Jurnal Riset Ilmu Teknik, October 2026
Publisher : Lembaga Penelitian dan Pendidikan (LPP) Kalibra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70716/reswara.v4i4.872

Abstract

SM490 steel is a structural steel that complies with JIS G3106 and is widely used in bridges and civil engineering structures due to its combination of strength, ductility, and good weldability. Before being applied to more complex analyses, the finite element model (FEM) for this material must be compared with experimental data to determine its reliability. This study developed an FEM model using Abaqus to simulate the true stress-true strain curve of SM490 steel under monotonic tensile loading and quantitatively evaluated the results against secondary experimental data. Validation was performed at nine points within the strain range of 2.151–7.450% using Mean Absolute Error (MAE), Root Mean Squared Error (RMSE), Mean Absolute Percentage Error (MAPE), Normalized RMSE (NRMSE), and the coefficient of determination (R²). The evaluation results yielded an MAE of 12.96 MPa, an RMSE of 17.17 MPa, a MAPE of 3.06%, an NRMSE of 3.14%, and an R² of 0.910, indicating good agreement between the numerical and experimental results. The largest error of 8.66% occurred at a strain of 2.279%, specifically in the transition region from the yield plateau to strain hardening. Conversely, the best agreement, with a MAPE of 0.90%, was obtained in the strain range of 5.0–7.5%. These results indicate that the FEM model used adequately represents the strain-hardening behavior of SM490, although evaluations in the elastic and yield plateau regions still require numerical results with higher resolution.

Page 15 of 16 | Total Record : 157

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