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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 Research of Scientia Naturalis
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 and Management of Senayan PLTD Noise Pollution Efendi, Aco Wahyudi
Jurnal Ekologi, Masyarakat dan Sains Vol 4 No 2 (2023): Jul-Des 2023
Publisher : ECOTAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55448/kt0bf693

Abstract

PLTD activities must pay attention to environmental conditions on the important impacts that occur, specifically regarding the impact of noise that occurs from the operation of the machine. This study's intention is to quantify the degree to which the Senayan 101 MW PLTD's operation has an adverse effect on the neighborhood's noise levels. Constant Noise Type having a broad frequency range. It is advised to install a barrier made of concrete blocks 200 x 200 x 400 with a thickness of 300 mm as high as 6000 mm and a distance of 3000 mm in areas where the noise level is above 70 dB.A. This will help to reduce noise pollution by 20.05 dB.A, bringing the initial noise level down to 68.65 dB. A.
Availability of the Sangatta Pelangi Hill Slide Using Geoelectric Correlation on the Borlog Efendi, Aco Wahyudi
Journal of Science and Education Research Vol. 2 No. 1 (2023): Journal of Science and Education Research
Publisher : Yayasan Pendidikan Insan Mulia Utan Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62759/jser.v2i1.27

Abstract

The earth's surface moves downward from a point in a process known as land subsidence, which causes the elevation of the ground surface to drop or become lower than it was. The geoelectric technique is one way to investigate soil. Depending on the electrical characteristics of the rock, this technique is one of the geophysical exploration methods that can give a generalized (map) of a rock layer or formation and the depth of the rock layers. The goals of this study were to model landslide behavior and identify the soil layers using geoelectric data. The rock or hard soil zone has a high resistivity rating based on geoelectricity. As a result, evidence of topsoil to clay may be seen in Trace 1's rock or hard soil zones, which range in depth from 18.5 to 24.9 tie points and 40 to 120 tie points, respectively. The soil layer is unidirectional and uniform. This geoelectrical value is linear with the results of a soil survey performed using the drilling method, i.e., the soil properties are quite sturdy and strong at a depth of 10–20 meters, with NSPT at a depth of 10–17 and increases at that depth. than 20 m at NSPT 60, and because it has reached twice NSPT 60, this can be considered real rock.
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.
ChatGPT application in ground settlement analysis using LISA V.8 FEA Efendi, Aco Wahyudi
Research of Scientia Naturalis Vol. 1 No. 1 (2024)
Publisher : Yayasan Adra Karima Hubbi

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

Abstract

OpenAI, an artificial intelligence research center situated in Ohio, USA, created ChatGPT. The model can be used to create autonomous discussions in conversational apps, assist with content generation, and even assist with multi-language translation with various degrees of accuracy for each language. ChatGPT is increasingly being used in all scientific domains and has a good influence, as evidenced by past research findings. This research will use ChatGPT in the field of geotechnical engineering by studying the settlement of soil layers with spongy clay type and validating it with modeling using LISA V.8 FEA finite element analysis (license). It is expected that this research will provide similar results to previous studies in engineering and other social fields. This research was conducted to be able to determine and provide validation of the behavior of the subsidence that occurred using ChatGPT and Finite Element Method Software LISA FEA V.8 from the results obtained were in model (a) there was a decrease in soil up to 0.0206 mm and in model (b) there was a decrease of 0.0167 with a ratio of 0.811 and with the ChatGPT model obtained a decrease of 0.0226 mm with a ratio of 1.097.
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 21-29
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.
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.
Examination of Deflection and Cracking in Classroom 1A's Concrete Structures: a Case Study and Retrofit Approaches Wahyudi Efendi, ST., MT., ASEAN Eng., ACPE., APEC Eng., Ir. Aco
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 Akbar Zulkarnain Amir Wardana Andi Muhammad Ade Satriya Chi Weijia Dadang Sanjaya Atmaja ESWAN, TUKIMUN, Luzan, Irwan Faisal Muh Yusuf Natriya Faisal Rachman Rizki Satria Putra Safitri, Novia Yahya Do Zubran, Azan