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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 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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Geoelectric Methods to Determine the Location of Old Graves Aco Wahyudi Efendi
Bulletin of Computer Science and Electrical Engineering Vol. 3 No. 1 (2022): June 2022 - Bulletin of Computer Science and Electrical Engineering
Publisher : Indonesian Scientific Journal

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25008/bcsee.v3i1.1147

Abstract

Gunung Selendang site is known for being classified as a burial site containing human bones, based on excavation findings in the form of a jug tomb (tajau), including; Limbs, hip fragments, jaw fragments, teeth, skull fragments, and small bone fragments that are difficult to identify. In general, the Tajau shape at this point consists of two groups, namely the slender Tajau group with wavy lips with a diameter of 23.5 cm and the chubby Tajau group with simple, unadorned lips with a diameter of 22 cm. Geophysical methods widely used in exploration include seismic, magnetic, gravitational, electrical, and electromagnetic resistance methods. The geoelectric method is one of the geophysical exploration methods that can be used to study the properties of a geothermal system, determine the lithology of rock layers, deposit locations, flow patterns, and the distribution of geothermal fluids below the earth's surface.From this material it can be clearly seen in the color of the soil layer and shows a collection of urn-shaped material in this color at a depth of up to 2 meters and according to the knowledge that from the side of the soil to a depth of 2 meters a collection of Urns with ancient fragments found.
ANALISIS PERKUATAN KOLOM PASCA KEBAKARAN PADA GEDUNG DPRD KALIMANTAN TIMUR Aco Wahyudi Efendi
JURNAL RIVET Vol 2 No 01 (2022): Juni 2022
Publisher : Program Studi Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (748.883 KB) | DOI: 10.47233/rivet.v2i01.412

Abstract

Dalam rangka memenuhi kebutuhan tersebut maka perlu dilakukan Investigasi dan Assesment pada gedung D Komplek Kantor DPRD Provinsi Kalimantan Timur yang bertujuan agar aktivitas yang terjadi dapat berjalan dengan baik. Adapun Investigasi dan Assesment ini merupakan salah satu upaya owner untuk dapat menunjang pencapaian sasaran. Dapat diketahui tingkat keamanan dan stabilitas bangunan gedung serta langkah-langkap yang perlu diambil untuk pemeliharaan dan memperbaiki/memperkuat strukturnya bila dianggap perlu. Dari hasil analisis struktur dengan konsep kapasitas layan Gedung dan mengunakan hasil investigasi metode NDT menggunakan f’c 20 MPa dan hasil jumlah kebutuhan tulangan pada tiap struktur secara garis besar Gedung DPRD masih dalam kondisi layak guna, namun pada segmen ruangan yang telah mengalami kebakaran pada lantai satu dilakukan analisis khusus dengam melakukan pengurangan mutu beton dan baja pasca terinteraksi dengan suhu besar sesuai dengan beberapa penelitian dan jurnal melakukan penurunan mutu hingga 40-50% dimana f’c dimasukkan menjadi f’c 10 MPa dan tegangan leleh minimun dan minimun pada baja tulangan ruangan tersebut diturunkan menjadi 50% fy 120 MPa dan fu 195 MPa.
Structural Design Tuak River Pedestrian Suspension Bridge Anchor Block Type Rigid Symmetric with LISA Aco Wahyudi Efendi
Elektriese: Jurnal Sains dan Teknologi Elektro Vol. 12 No. 01 (2022): Artikel Riset Periode April 2022
Publisher : Information Technology and Science (ITScience)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1159.477 KB) | DOI: 10.47709/elektriese.v12i01.1572

Abstract

Anchor blocks are one of the components and elements that are very risky for suspension bridge construction, because almost The ability The Suspension bridge resistance rests on the cables held in place by the anchor block. This anchor block behavior study is to find out the major stress information occurring in the anchor block elements. In this research, the researcher refers to the Circular Letter of Design Criteria for Rigid Symmetrical Pedestrian Suspension Bridge, and conducts structural modeling using the finite element method-LISA program on anchor blocks. Condition of the anchor block after receiving the appropriate tensile force from the round table at a span of 96 meters, the tensile force of the suspension bridge cable is 664.6 kN, resulting in a stress of 6.184 N/mm2 on the concrete surface of the anchor block using the concrete grade is fc 30 MPa, in the suspension cable of the bridge there is a tension of 22.26 N/mm2 at the point of work. The results of the analysis of the anchor block used on the Tuak River Suspension Bridge with a span of 96 m can meet the required criteria, namely the axial load-bearing capacity, which is greater than the maximum axial force that occurs in the Borpile configuration. In the analysis of the finite element method using the LISA FEA device, a significant stress occurs in the anchor block section with the suspension bridge cable as shown in Figure 9, this occurs because of the large tensile force on the suspension bridge cable and the ability of the anchor block to remain in a stable condition is known.
Behavior Analysis of Building Structures After a Fire with FEA LISA V.8 Aco Wahyudi Efendi
Kurva S : Jurnal Keilmuan dan Aplikasi Teknik Sipil Vol 10, No 1 (2022)
Publisher : Department of Architecture, Faculty of Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (822.151 KB) | DOI: 10.31293/teknikd.v10i1.6413

Abstract

Inspection of DPRD D office building by building inspection procedures using non-destructive inspection (NDT) method. By using the finite element method, the element discretization approach is used to solve the problem of finding the displacement of vertices/relations/lattices and structural forces. Discrete element equations are related to the matrix method for structural analysis and the results obtained are identical to those of classical analysis for structures. The discretization can be done with one-dimensional, two-dimensional or three-dimensional elements. LISA, a popular finite element analysis application, was used to estimate temperature rise for three different heat exchanger models. From the results of the behavior occurring in normal and post-combustion columns, it can be seen that there is a significant change in stress due to axial loading of the column and that the displacement behavior also changes quite significantly.Pemeriksaan bangunan gedung kantor DPRD D dengan metode pemeriksaan gedung menggunakan metode non-destructive inspection (NDT). Dengan analisis menggunakan Metode Elemen Hingga pendekatan diskritisasi elemen untuk menyelesaikan masalah pencarian perpindahan simpul/hubungan/kisi dan gaya struktural. Persamaan elemen diskrit terkait dengan metode matriks untuk analisis struktur dan hasil yang diperoleh identik dengan analisis klasik untuk struktur. Diskritisasi dapat dilakukan dengan elemen satu dimensi, dua dimensi atau tiga dimensi. LISA, aplikasi analisis elemen hingga yang populer, digunakan untuk memperkirakan kenaikan suhu untuk tiga model penukar panas yang berbeda. Dari hasil perilaku yang terjadi pada kolom normal dan pasca pembakaran terlihat adanya perubahan tegangan yang signifikan akibat pembebanan aksial kolom dan juga perilaku perpindahan yang berubah cukup signifikan.
DAMAGE IDENTIFICATION SEGAH BRIDGE PIER DUE TO SHIP IMPACT Aco Wahyudi Efendi
Selodang Mayang: Jurnal Ilmiah Badan Perencanaan Pembangunan Daerah Kabupaten Indragiri Hilir Vol 8 No 2 (2022): JURNAL SELODANG MAYANG
Publisher : Badan Perencanaan Pembangunan Daerah Kabupaten Indragiri Hilir Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47521/selodangmayang.v8i2.255

Abstract

Identification of damage or often referred to as on-site structural forensic testing, using visual observation methods and testing of existing materials using the Non Destructive Test method, in addition to check condition the geometry of the bridge after a ship hit. Conducted to determine the extent of damage to the Segah Bridge P2 pier after it was struck by a pontoon vessel carrying coal material across the Segah Bridge. To conduct this research, in addition to collecting data from the visual survey and some field testing, the results were analyzed using LISA FEA to determine the behaviors and stresses encountered during the incident. This investigation was conducted by collecting data from the on-site visual inspection followed by an inspection using the NDT tool to determine the material condition of the elements of the struck bridge, namely the P2 pierhead of the Segah Bridge. After collecting data, it proceeds by performing a microstructural analysis using the FEA software, namely LISA FEA V.8. From the results of the research and data processing, it can be seen that the damage behavior resulting from the numerical analysis using LISA FEA is very similar to the conditions in the field, which of course is obtained from very detailed and measurable parameters and data collection, so that the behavior corresponds to the actual state. Identifikasi kerusakan atau sering disebut dengan structural forensik testing, menggunakan metode observasi visual dan pengujian material yang ada menggunakan metode Non Destructive Test, selain untuk memeriksa geometri jembatan setelah ditabrak kapal. Dilakukan untuk mengetahui tingkat kerusakan dermaga P2 Jembatan Segah setelah ditabrak kapal ponton yang membawa material batubara melintasi Jembatan Segah. Untuk melakukan penelitian ini, selain mengumpulkan data dari survei visual dan beberapa pengujian lapangan, hasilnya dianalisis menggunakan LISA FEA untuk mengetahui perilaku dan tekanan yang dihadapi selama kejadian. Penyelidikan ini dilakukan dengan mengumpulkan data dari inspeksi visual di lapangan yang dilanjutkan dengan inspeksi menggunakan alat NDT untuk mengetahui kondisi material elemen jembatan yang tertimpa yaitu pierhead P2 Jembatan Segah. Setelah data terkumpul, dilanjutkan dengan melakukan analisis mikrostruktur menggunakan software FEA yaitu LISA FEA V.8. Dari hasil penelitian dan pengolahan data dapat diketahui bahwa perilaku kerusakan yang dihasilkan dari analisis numerik menggunakan LISA FEA sangat mirip dengan kondisi di lapangan, yang tentunya diperoleh dari parameter dan pendataan yang sangat detail dan terukur. , sehingga perilaku sesuai dengan keadaan sebenarnya.
Computing steel frame analysis of behavior semi-rigid connection Aco Wahyudi Efendi
International Journal of Advanced Science and Computer Applications Vol. 2 No. 1: March 2023
Publisher : Utan Kayu Publishins

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ijasca.v2i1.17

Abstract

Semi-rigid connections are very economical compared to other connections because they can prevent the frame from breaking immediately due to brittleness without endangering the entire structure. Steel frame construction is one of the types of construction described in the building codes for simple seismic buildings. The research on the use of this semi-rigid connection uses one of the computer software that uses the finite element method, namely ANSYS ED.9, by taking validation models from experimental and manual calculation analysis and using 35 research models with different loads, positions and number of bolts and types of portal bracing. The ability to survive on the gantry due to side loads is dominated by the number and position of the bolts and the type of gantry stiffener used, this is evident from the different models, with the rise ratio in each model ranging from 0.7852 to 2.5900 and in ranges of softening compared to clamped stiffeners, which experience a decrease in stress, with the same ratio.
Behavior of railroad bearing due to temperature and load using LISA FEA Aco Wahyudi Efendi; Akbar Zulkarnain; Dadang Sanjaya Atmaja
Journal of Railway Transportation and Technology Vol. 1 No. 1 (2022): May
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.879 KB) | DOI: 10.37367/jrtt.v1i1.1

Abstract

A very important element of railway is the rail bearing, different types of rail bearings that we know in Indonesia are wooden rail bearings, concrete rail bearings. In this study, the stress behavior that occurs in the two types of railway bearings due to the load and the occurring temperature effect is to be checked. It was found that the stress occurring in bearings with different materials, namely concrete and wood, when the The nominal stress can be seen on the concrete bearing is 11.87 N/mm2, on the wooden material the bearing load is 10.41 N/mm2. As for the temperature effect, it looks similar to the temperature of 80 °C for each material, but it can be seen that the temperature effect spreads from the surface due to the friction between the railroad tracks and the railroad wheels.
Behavior of Rail Ballast Layer Using Mortar Foam with LISA-FEA Aco Wahyudi Efendi; Yahya Do; Natriya Faisal Rachman
Journal of Railway Transportation and Technology Vol. 1 No. 2 (2022): November
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (601.29 KB) | DOI: 10.37367/jrtt.v1i2.8

Abstract

In the development of railroads, geosynthetics can be introduced in or under the stabilizer layer or sub ballast, foam mortar has become one of the trends in the construction sector in replacing the foundation layer as an excellent alternative. The researcher conducted a comparative analysis on railroad ballast by using a substitute for conventional railroad ballast material, namely granular material using mortar foam, conducting research on the stresses that occur and the value of the decrease that occurs in ballast using mortar foam. From the results of the analysis of this study, it was found that there was an increase in the ability of ballast with mortar foam material compared to granular material, the decrease in stress that occurred and a decrease in the deformation value in railroad construction gave an option to use conventional ballast substitutes.
Buffer stops behavior due to rail impact loads with LISA FEA Aco Wahyudi Efendi; Chi Weijia
Journal of Railway Transportation and Technology Vol. 2 No. 1 (2023): March
Publisher : Politeknik Perkeretaapian Indonesia Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37367/jrtt.v2i1.20

Abstract

The buffer stop also offers a gradual deceleration to the train, lowering the chance of passenger harm and railway damage. The buffer stop's conduct is critical for the train system's safety and integrity. The researcher conducted an analysis of the behavior of the buffer stop after being hit by an oncoming train and experienced failure in braking by using solid steel materials and with an additional layer of rubber on the head end of the train stop buffer. With reference to the impact force parameters that have been calculated in previous studies so that it can be viewed from the stress that occurs and the value of the lateral movement that occurs at the buffer stops.From the results of the analysis of this study it is known that an increase in the ability of the buffer stops by replacing steel material with rubber does not provide a significant increase, however, thickening the flange and web of the buffer stops provides a significant increase in capability with a ratio of 3,582 to the applied stress. and increased ability to reduce the length of the drift by a ratio of 2,478.
Simulation of fire exposure behavior to building structural elements using LISA FEA V.8. Aco Wahyudi Efendi
International Journal of Advanced Science and Computer Applications Vol. 2 No. 2: September 2023
Publisher : Utan Kayu Publishins

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47679/ijasca.v2i2.31

Abstract

The purpose of this work is to evaluate the most generally used techniques for measuring the thermal conductivity of concrete, as well as to consider the variables influencing the thermal conductivity of cement-based materials. Based on previous research indicating that the pattern of heat flow can be modeled in a numerical analysis program and provide a hue of coverage and differences in indoor temperature conditions, as well as the impact that occurs on several elements in the room, a heat simulation analysis was performed in this study due to a fire. The researchers in this study simulated the flow pattern from the temperature that occurred due to fire in a room measuring 4000x4000 mm with a wall thickness of 200 mm with Hebel/light brick material, floor plate thickness was 120 mm, and the size of the building column structural elements was 400x400 mm with the material reinforced concrete. According to the simulation results of a fire that occurred in the middle of the room with two conditions for installing hebel walls, namely covering the building structure columns and those behind the building structure columns, there is an increase in the temperature of the column with a ratio of 1.062 in the two conditions where the temperature of the wall lining the column is 6.28% lower than the temperature of the wall behind the column, while the heat flux magnitude that occurs is lower.
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