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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Kurva S : Jurnal Keilmuan dan Aplikasi Teknik Sipil Dinamika Bahari: Journal of Maritime Dynamic Jurnal Ekologi, Masyarakat dan Sains Bulletin of Computer Science and Electrical Engineering (BCSEE) SELODANG MAYANG Journal of Metallurgical Engineering and Processing Technology Teknik: Jurnal Ilmu Teknik dan Informatika International Journal of Advanced Science and Computer Applications Jurnal Sintesis: Penelitian Sains, Terapan dan Analisisnya Jurnal Rivet: Riset dan Invensi Teknologi Journal of Innovation Research and Knowledge Elektriese: Jurnal Sains dan Teknologi Elektro Nusantara Civil Engineering Journal Media Bina Ilmiah Journal of Railway Transportation and Technology OKTAL : Jurnal Ilmu Komputer dan Sains Journal of Research and Inovation in Civil Engineering as Applied Science Journal of Science and Education Research Sainstech Nusantara
Aco Wahyudi Efendi
Civil Engineering, Faculty Of Engineering, Tridharma University Balikpapan
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Transportation Other

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Analysis Surface Structure Improvement of Runway Threshold 07-25 Using FAARFIELD EFENDI, ST., MT, Ir.ACO WAHYUDI
Teknik: Jurnal Ilmu Teknik dan Informatika Vol. 1 No. 2 (2021): Oktober : Teknik: Jurnal Ilmu Teknik dan Informatika
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/teknik.v1i2.56

Abstract

Runway or runway is an area used by aircraft to take off. The length of the runway depends on the size of the aircraft served. Runway has a pavement structure that can withstand the weight of an aircraft when it wants to fly. This study discusses the damage to the surface structure of the Threshold 07 and Threshold 25 runways at the Sultan Aji Muhammad Sulaiman (SAMS) runway in Sepinggan Balikpapan. Damage to the pavement surface often results from significant heat temperatures from the aircraft when taking off. Visual observations show that there are problems with the Threshold 07 and Threshold 25 pavement surfaces, the damage that occurs is the change in the surface shape of some segments, where the surface deformation eleves are up to 40 mm. Test results from Coredrill samples show that there are internal problems in the asphalt mixture, namely high asphalt content and low density value. By looking at the conditions above, there are problems caused by external and internal factors of the existing pavement, especially the surface conditions namely Threshold which is a location where the load is in MTOW conditions and the aircraft is moving slowly as well as high temperatures (environment and pavement)
Noise exposure impact zone hue modeling using LISA FEA V.8 EFENDI, ST., MT, Ir.ACO WAHYUDI
Teknik: Jurnal Ilmu Teknik dan Informatika Vol. 2 No. 2 (2022): Oktober : Teknik: Jurnal Ilmu Teknik dan Informatika
Publisher : LPPM Sekolah Tinggi Ilmu Ekonomi - Studi Ekonomi Modern

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51903/teknik.v2i3.153

Abstract

This study aims to obtain data on the impact of noise pollution by conducting a noise test from the operation of the PLTD and modeling it to get the noise impact hue. Finite element software modeling the impact of noise generated from the operation of PLTD to determine the hue of the noise impact. LISA, a popular finite element analysis application, was used to estimate and complete this study using the finite element model. Noise data retrieval, some data is carried out according to the engine power load during production and the machine stops with a certain distance reference to the affected area, namely residential areas, with a zone radius of up to 100 m from the machine point. The condition of the impact of noise exposure that occurs, where in general the area that has a major impact on settlements is a linear area of openings at the noise source because noise waste is free to come out of building openings without any obstacles. , so that the nominal sound impact that occurs without these obstacles, the average noise value is above the 70 dB.A threshold with the category of very disturbing.
GEOTECHNICAL INVESTIGATION OF TIDAL FLOODING-RELATED ROAD SUBSIDENCE ON THE BONTANG-KUALA ROAD SECTION Aco Wahyudi Efendi; Tukimun, Tukimun; Rizki Satria Putra; Amir Wardana
Journal of Innovation Research and Knowledge Vol. 5 No. 6 (2025): Nopember 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Bontang-Kuala road in East Kalimantan Province faces major problems due to daily tidal flooding and significant road subsidence. The objective of this study is to conduct a geotechnical analysis of the current conditions and develop more efficient solutions. Field surveys, soil investigations, and numerical analysis using the finite element method were employed in this study. To validate soil parameters, a back-analysis was conducted using ten years of subsidence data, which indicated a subsidence of 39.58 cm. The analysis results showed that conventional embankment reinforcement cannot withstand the required traffic load and may collapse. There are three treatment options: Pile slab structure, pile embankment with soil fill, and pile embankment with mortar foam fill. It was proven that each option meets the stability and technical design settlement requirements.
Investigation of the Collapsed Dolphin Structure of the Mahakam Bridge Using Bathymetry and Side-Scan Sonar After Collision Efendi, Aco Wahyudi
JURNAL RIVET Vol 5 No 02 (2025): Desember 2025
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v5i02.2324

Abstract

This study investigates the collapse of the dolphin (fender) structure of the Mahakam Bridge in Samarinda, Indonesia, following a collision with a timber-laden pontoon ship. High-resolution bathymetry and side-scan sonar (SSS) techniques were employed to map debris distribution, quantify structural damage, and assess risks to bridge integrity and navigational safety. The dolphin structure, critical for pier protection, suffered catastrophic failure, with debris fields extending 42.6–51.5 m laterally and covering 617.7–721 m². Bathymetric surveys revealed elevation anomalies of 1–1.5 m at depths of 4.5 m, while SSS identified cylindrical debris (diameter: 8 m) consistent with dolphin components. Integration of these methods enabled precise debris localization (00°50′13.29″ S, 117°18′24.51″ E) and informed relocation recommendations for navigation aids. The findings underscore the efficacy of remote sensing in turbid riverine environments and provide a framework for post-collision infrastructure assessment.
PEMODELAN PENURUNAN TANAH DI IBU KOTA NEGARA NUSANTARA MENGGUNAKAN ANALISIS NUMERIK METODE ELEMEN HINGGA LISA V.8 Aco Wahyudi Efendi
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 12 No. 1 (2023)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.12.1.5643.21-29

Abstract

The IKN area is dominated by hilly areas and broad plains, Seeing the various soil characteristics and varying land elevations, disasters such as landslides and land subsidence often occur. This study validates the results of LISA against a geotechnical analysis program that is very often used and specifically for geotechnical software. It is hoped that the results of this study can contribute to the geotechnical world, especially to become a new treasure using the finite element method LISA. Forr the point of view the settlement that occurs is 0.0623 meters, where at analysis using geotechnical software, the settlement that occurs at the same point in the review is 0.0633 meters, there is an insignificant difference with a ratio of 1.016 from the results of the geotechnical software with the results of LISA V.8 FEA.
FORENSIC INVESTIGATION Of THE SAMARINDA IBU dan ANAK HOSPITAL BUILDING: STRUCTURAL SETTLEMENT ANALYSIS Aco Wahyudi Efendi
JURNAL RIVET Vol 4 No 02 (2024): Desember 2024
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v4i02.1678

Abstract

In initiatives to enhance the quality of infrastructure, especially with regard to building stability and the avoidance of structural failure, the safety and comfort of visitors has taken center stage. In order to improve infrastructure, older or decaying buildings are frequently reinforced or renovated. This may entail repairing accumulated damage without requiring total demolition. In order to guarantee the structure's dependability and safety, these remodeling initiatives require careful assessment and study. Concerns over apparent settlement of the Ibu dan Anak Hospital building in Samarinda have been brought up, highlighting the significance of assessing structural integrity to guarantee ongoing safety and functionality. The purpose of this study is to conduct a thorough structural audit of the building in order to find any possible hazards and suggest any necessary improvements. The study assessment the building's stability and forecasts future settlement by simulating its behavior under various circumstances, including dynamic and static load scenarios, using sophisticated modeling software such as GEOSLOPE-GEOSTUDIO (Student Version). According to the aforementioned analytical results, there are signs that the hard soil layer is not reached by the pile depth, which causes settlement. Over the course of the following year, the settlement increased from 15.89 cm in the first 178 days to 17.64 cm. The analysis indicates that the settlement will stay at 31.65 cm for the next five years, therefore after 1,780 days, it is deemed stable.
Investigation for Collapsed Navigation Structures in The Mahakam River Delta by Bathymetry and Sonar Aco Wahyudi Efendi
JURNAL RIVET Vol 5 No 01 (2025): Juni 2025
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v5i01.2062

Abstract

Investigation of the Collapsed Dolphin Structure of the Mahakam Bridge Using Bathymetry and Side-Scan Sonar After Collision Aco Wahyudi Efendi
JURNAL RIVET Vol 5 No 02 (2025): Desember 2025
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v5i02.2324

Abstract

Integrated Geoelectric-Geotechnical Characterization For Landslide Mitigation In East Kalimantan, Indonesia Aco Wahyudi Efendi
JURNAL RIVET Vol 6 No 01 (2026): Juni 2026
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/rivet.v6i01.2703

Abstract

A significant landslide affecting Syarifuddin Yoes Road in the Kutai Basin, East Kalimantan, was triggered by elevated pore water pressure from leaking PDAM water infrastructure and inadequate surface drainage. This investigation integrated two-dimensional (2D) geoelectric resistivity surveys (Schlumberger configuration), Standard Penetration Tests (SPT), and visual inspection from 4-meter-deep test pits to characterize the 60-meter rotational failure mechanism. Visual analysis revealed a continuous soil flow. A robust inverse correlation was established: low-resistivity anomalies (1–50 Ohm-m) directly corresponded with low SPT N-values (2–8 blows/30 cm) and weak saturated clays. Borehole data detected groundwater at 4 meters, aligning with low-resistivity anomalies at 4.5 meters. This multi-method approach successfully identified the primary weak slip surface at a depth of 5 to 8 meters. The geoelectric method is recommended as an efficient, cost-effective initial benchmark for spatial subsurface characterization before costly intrusive boring. These integrated subsurface models substantiated the design of D600 Contiguous Bored Piles as a mitigation structure.
Examination of Deflection and Cracking in Classroom 1A's Concrete Structures: a Case Study and Retrofit Approaches Aco Wahyudi Efendi
Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID) Vol 5 No 1 (2026)
Publisher : Teknik Sipil, Politeknik Negeri Ketapangg

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/05d66b02

Abstract

Providing an emphasis on the second-floor slab and beams, this study provides a thorough investigation of the bending and cracking seen in the concrete structures of Classroom 1A at SDIT Auliya Balikpapan. In multi-story buildings, excessive deflection and critical fracture widths can seriously jeopardize serviceability, user comfort, and structural integrity [1], [2]. The present state of the structure was evaluated in detail utilizing a combination of Finite Element Method (FEM) analysis using LISA FEA and Non-Destructive Testing (NDT) techniques, such as Ultrasonic Pulse Velocity (UPV), Crack Width Test, Rebar Scanner Test, and Schmidt Hammer Test. The results showed that although the majority of the beams had acceptable crack widths and deflection, the second-floor slab had a considerable 30 mm deflection, which was more than the 19.44 mm allowed by SNI 2847:2019 [3], [4] , and some of the beams (R1.B1, R1.B2, and R2.B4) also had crack widths that were greater than the 0.41 mm threshold [5], [6]. Additionally, FEM analysis revealed stress concentrations in the slab that exceeded the nominal compressive strength of the concrete. In order to restore the classroom building's structural safety and long-term durability, a retrofitting solution utilizing Fiber Reinforced Polymer (FRP) is suggested, along with ongoing monitoring and possible reevaluation of design criteria.
Co-Authors Ahmad Athoillah Syaichul Ghulam Akbar Zulkarnain Amir Wardana Andi Muhammad Ade Satriya Azan Zubran Chi Weijia Dadang Sanjaya Atmaja ESWAN, TUKIMUN, Gilang Rahmat Aprianto Irwan Faisal Luzan Luzan, Irwan Faisal Muh Yusuf Muh Yusuf Najla Ayu Febrina Nasution Natriya Faisal Rachman Novia Safitri Rizki Satria Putra Safitri, Novia Syirly Adella Wijayanti Hariono Yahya Do Zubran, Azan