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All Journal Jurnal Planologi Sultan Agung Rekayasa Mesin Sinergi Rekayasa Sipil Jurnal Ilmiah Manajemen dan Bisnis (JIMB) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Teknik Mesin Teras Jurnal Faktor Exacta The Spirit of Society Journal : International Journal of Society Development and Engagement BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Jurnal AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Astonjadro Jurnal Abdi Insani International Journal of Advanced Technology in Mechanical, Mechatronics and Material (IJATEC) International Journal of Community Service International Journal of Innovation in Mechanical Engineering and Advanced Materials Eduvest - Journal of Universal Studies SAINTEK Jurnal Pengabdian Masyarakat Nasional Prosiding Seminar Nasional Ilmu Teknik Proceeding of The International Conferences on Engineering Sciences Jurnal Teknik Sipil
Agung Wahyudi Biantoro
Universitas Mercu Buana
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Evaluation of FIR bandpass filter and Welch method implementation for centrifugal pump fault detection Romahadi, Dedik; Feleke, Aberham Genetu; Adinarto, Tri Wahyu; Feriyanto, Dafit; Biantoro, Agung Wahyudi; Rachmanu, Fatkur
SINERGI Vol 29, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.2.007

Abstract

The motivation for this research is the high vibration observed during the operation of the centrifugal cooling water pump. Our study aims to assess the pump's state and check the vibrations to ensure the factors underlying the fault of the centrifugal pump in the alkaline chlorine factory. While previous studies have primarily used spectral amplitude results from the Fast Fourier Transform to analyze engine vibrations, we propose a different approach in this study. We employ the Finite Impulse Response (FIR) Bandpass Filter and the Welch Method, a practical analytic approach. The ISO 10816-3 standard is a benchmark of the RMS value to determine the pump's condition. The FIR Bandpass Filter and Welch Method prove to be highly effective in describing and modifying the vibrational signals of the centrifugal pump. The approach is particularly beneficial as it is consistent across sample rate settings, reduces the vibration of amplitude low, produces a smoother spectrum with only the primary frequency component, and segments the vibration signal into the frequency band-aids to identify the primary vibration source. The diagnostic results reveal increased vibrations at 1x, 2x, and ball pass frequency (BPF), indicating impeller damage and disappearance. Post-repair, the vibration value experiences a significant drop, as per the fault analysis results, further confirming the high effectiveness of our approach. These findings have practical implications for the maintenance and fault diagnosis of centrifugal pumps, providing a reliable and effective method for identifying and addressing issues. 
Application of Ultrasonic and Coating Material Thickness Testing on Post-Fire Steel Construction Citra, Zel; Antonius; Biantoro, Agung Wahyudi
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.02.12

Abstract

Steel has advantages over other construction materials, including flexibility and processing time. Steel has better elasticity and relatively faster processing time compared to reinforced concrete. However, the weakness is that steel is also very susceptible to temperature changes. If a steel material experiences an increase in temperature, for example, if it is directly exposed to fire, its yield and tensile strength will decrease drastically. This can cause the function of the steel material as a structural element to change. In early 2023, a fire occurred in a steel construction tower used for animal feed processing, PT. XYZ in the Lampung area. As a result of the fire, there is a concern about the risk of structural failure, which could cause worker fatalities in the building. So, it is necessary to test the thickness of steel tower structural elements such as columns, beams, and bracing using the Non-Destructive Test method with an Ultrasonic Material Gauge and Material Coating Thickness. The test samples were taken in as many as 20 samples with the test structure including column elements, beam elements, and bracing at each level or elevation of the fire-affected floor. Test sample include WF200X100X5,5x8, WF250X125X6X9, WF300X150X6,5X9, WF400X200X8X13, HB400X400X13X21 and Pipe Ø6”. The results of the post-fire steel structure measurement, the thickness of columns, beams, and bracing from 20 samples, showed that 95% still met the thickness tolerance of 0.7 mm- 1.2 mm based on the SNI 07-0329-2005. The thickness of the post-fire coating, 95% steel structural coating, did not meet the standards below 240mm. Only 5% met the minimum coating thickness standards, such as pipe bracing Ø6" with a coating thickness of 397 microns. And for repair, repainting is recommended. Repainting must be done to prevent corrosion and restore the structure's safety.
ANALISIS BEBAN PENDINGINAN RUANG GARDU TRAKSI STASIUN LEBAK BULUS BERDASARKAN STANDAR SNI 6389-2011 DAN ASHRAE GUNAWAN, JEFRI; BIANTORO, AGUNG WAHYUDI
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 7 No. 2 (2021)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/ame.v7i2.4936

Abstract

Gardu traksi Stasiun Lebak Bulus dijaga suhu ruangan dan kebersihannya untuk mempertahankan umur pakai peralatannya. Baterai untuk suplai daya sistem 110 VDC idealnya beroperasi pada suhu 20℃ untuk umur pakai 20 tahun karena setiap kenaikan 8℃ umurnya menjadi separuhnya. Suhu ruangan pada tahun 2019-2020 berkisar antara 29.3- 34.6℃ sehingga umur operasinya hanya 38% dari desainnya. Selain itu, terjadi beberapa kali kerusakan pada rectifier, pengisi daya baterai dan RTU (remote terminal unit) sepanjang 2019-2020 yang disebabkan oleh suhu ruangan yang tidak ideal dan berdebu. Untuk menjaga umur peralatan, diperlukan mesin pendingin udara dengan kapasitas sesuai dengan beban pendingin yang diperlukan untuk suhu ruangan 20℃. Sehingga perlu dilakukan analisis beban pendingin meliputi perhitungan beban pendingin dari luar melewati selubung bangunan dan perhitungan beban pendingin total. Metode analisis deskriptif digunakan dengan menghitung nilai OTTV (Overall Thermal Transfer Value) dan beban pendingin berdasarkan Standar SNI 6389-2011 dan ASHRAE. Peralatan yang digunakan antara lain portable thermo-hygrometer dan digital laser distance. Hasilnya, nilai OTTV dari ruang gardu traksi sebesar 8,7 W/m2, sesuai dengan standar SNI 6389-2011 OTTV yaitu  35 W/m2. Kemudian total beban pendingin sebesar 269.318,22 BTU/h, sehingga dibutuhkan mesin pendingin udara dengan kapasitas 22,44 TR = 29,92 PK untuk mendinginkan ruang gardu traksi pada suhu 20℃.
Kondisi Struktur Tower Baja Terdampak Kebakaran Melalui Inspeksi Secara Visual Zel Citra; Antonius Antonius; Biantoro, Agung Wahyudi
Prosiding Seminar Nasional Ilmu Teknik Vol. 1 No. 2 (2024): Desember : Prosiding Seminar Nasional Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/prosemnasproit.v1i2.40

Abstract

Building fires can significantly degrade the strength and integrity of steel structures, so post-incident evaluation is crucial to ensure building safety and feasibility. This study aims to evaluate the condition of the steel tower structure after the fire through a visual inspection method. A total of 35 structural elements were examined, including columns, beams, and bracing, to identify damage caused by heat exposure. The inspection results showed that 6 elements (17%) were in the category of Acceptable, 8 elements (23%) Needs Attention, 5 elements (14%) Not Acceptable, and 1 element (3%) Not Applicable because they had been removed. Steel columns generally remain upright without deformation, but suffer damage to the protective layer (coating). In contrast, most blocks lose their protective layers, are directly exposed to fire, show early signs of corrosion, and some suffer severe damage such as flange tears and cuts. These findings confirm the importance of systematic documentation and classification of element conditions as the basis for technical decision-making for structural improvement. Visual inspection proved effective as an initial step in the evaluation process, providing a relevant initial picture of the extent of damage and the need for intervention. This study recommends follow-up in the form of advanced structural analysis and material testing to ensure the feasibility of reusing the affected steel elements.
ANALYSIS OF THE EFFECT OF PENSTOCK DIAMETER ON HYDROCOIL TURBINE PERFORMANCE IN SUKAJAYA VILLAGE, LEMBANG DISTRICT, WEST JAVA alif, irfan alif; Biantoro, Agung Wahyudi
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 3 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i3.18244

Abstract

The turbine used in this study is a reaction turbine called hydrocoil turbine. In hydrocoil turbines require penstock pipe components to support turbine performance, the size of the penstock pipe has its own potential. Errors in determining the diameter of the penstock can affect the performance of hydrocoil turbines. The purpose of this study is to perform penstock comparison using ansys with a diameter of 6 inches, 8 inches and 10 inches and determine the diameter of the penstock to get the best hydrocoil turbine performance. This study was conducted using Computational fluid dynamics (CFD) method which includes torque, turbine power, and efficiency, the results of the analysis of the calculation of the highest torque value obtained by the 10-inch penstock at 150 rpm rotation of 398.51 Nm, and the torque value obtained by the 8-inch penstock at 150 rpm rotation of 282.47 Nm, the lowest torque value obtained by the 6-inch penstock at 950 rpm rotation of 51,061 Nm. Then the highest power value obtained by the 10-inch penstock at 950 rpm rotation of 27279.53 Watts and the power obtained by the 8-inch penstock at 950 rpm rotation of 21861.41 Watts, the lowest power obtained by the 6-inch penstock at 950 rpm rotation of 5077.16 Watts. So that the highest efficiency value obtained by 10-inch penstock at 950 rpm rotation of 90.58% and the efficiency value obtained by 8-inch penstock at 950 rpm rotation of 72.59 %, the lowest efficiency value obtained by 6-inch penstock at 950 rpm rotation of 16.85 %. It can be concluded from the values already obtained, penstock with a diameter of 10 inches has the highest value to get the best turbine performance, followed by penstock diameter of 8 inches has the highest value Number 2 and penstock with a size of 6 inches has the lowest value, proven by the speed varied according to the diameter of the penstock and constant discharge indicates that the larger the diameter of the penstock will produce the best turbine performance.
Assessment of Steel Structure Connections After Fire Exposure Through Bolt Torque Testing and Dye Penetrant Inspection Zel Citra; Antonius Antonius; Agung Wahyudi Biantoro
Proceeding of the International Conferences on Engineering Sciences Vol. 2 No. 1 (2025): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v2i1.41

Abstract

In 2022, a significant fire incident occurred at a steel tower structure in an industrial plant in Lampung, Indonesia, raising serious concerns about the structural integrity and serviceability of the affected steel framework. Fire exposure is known to alter the properties of steel, weaken bolt pretension, and cause defects in welds, underscoring the necessity of thorough post-fire assessments. Nondestructive testing (NDT) methods are crucial in evaluating the safety and stability of structures after fire exposure, as they can detect potential weaknesses without compromising the material further. This study employed two field inspection methods: the bolt torque test and dye penetrant inspection (DPI). A total of 21 bolts (Tor-1 to Tor-21) were tested for their integrity. The results showed that, while all bolts were present, more than half were found to be loosened, indicating the need for re-tightening to restore the specified torque and maintain the required preload for the bolted connections. In addition, 20 welded joints (DP-1 to DP-20) were examined using DPI to detect surface defects. The inspection revealed that 10 welds (50%) exhibited surface defects exceeding 5 mm in length, indicating areas where the welds had been compromised by the fire exposure. Seven welds (35%) were found to be in acceptable condition, while 2 welds (10%) were incomplete or had poor bonding. These findings suggest that while the bolted joints can be restored through corrective re-tightening, the welded joints require more extensive evaluation, local repairs, or even rewelding to ensure their structural integrity. This study highlights the importance of NDT methods in post-fire structural evaluations and recommends periodic inspections and targeted rehabilitation to ensure the long-term reliability and safety of industrial steel structures.
Penilaian Kondisi Kekerasan dan Kekuatan Struktur Baja Eksisting Menggunakan Pengujian Leeb Hardness (Studi Kasus : Bangunan Baja Penyimpanan) Zel Citra; Antonius Antonius; Agung Wahyudi Biantoro; Herol Herol; Risma Apdeni
Prosiding Sains dan Teknologi Vol. 5 No. 1 (2026): Seminar Nasional Sains dan Teknologi (SAINTEK) ke 5 - Februari 2026
Publisher : DPPM Universitas Pelita Bangsa

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

Abstract

Silo baja pada fasilitas industri beroperasi dalam lingkungan agresif serta menerima beban siklik jangka panjang yang dapat memicu degradasi sifat mekanik material. Oleh karena itu, evaluasi kondisi struktur eksisting diperlukan untuk menjamin keselamatan operasional tanpa mengganggu fungsi layanan melalui pengujian destruktif. Penelitian ini menyajikan studi kasus penilaian kekuatan baja pada silo berkapasitas 500T, 3500T, dan 5000T di sebuah pabrik di wilayah Tangerang menggunakan metode uji non-destruktif berbasis kekerasan. Pengujian dilakukan dengan alat uji kekerasan portabel pada beberapa ring ketinggian. Nilai kekerasan Leeb (HL) yang diperoleh dikonversi menjadi estimasi kuat tarik ultimit (fu) dan kuat leleh (fy). Hasil konversi kemudian dibandingkan dengan nilai rujukan baja struktural untuk menentukan tingkat reduksi kekuatan material yang diasosiasikan dengan korosi dan pengaruh operasional. Evaluasi menunjukkan bahwa secara umum kekuatan material masih berada dalam kisaran yang mendekati standar. Namun, tren penurunan kapasitas teridentifikasi cukup konsisten pada ring bagian bawah hingga menengah. Rata-rata reduksi terbesar terjadi pada silo 3500T yaitu sekitar 11%, diikuti silo 500T sebesar 7%, sedangkan silo 5000T menunjukkan penurunan paling kecil sekitar 5%. Perbedaan ini diduga berkaitan dengan variasi desain, mutu material awal, serta kondisi paparan lingkungan. Hasil penelitian menegaskan bahwa metode kekerasan non-destruktif efektif sebagai alat skrining awal dalam mengevaluasi kelayakan struktur silo baja yang masih beroperasi.
Identification of the Effect of Concrete Carbonation on the Strength of Cooling Tower Structures Using the Monte Carlo Simulation Method Agus Supiyat; Agung Wahyudi Biantoro
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 12 No 2 (2024): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (July 2024)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v12i2.9530

Abstract

Cooling Tower buildings are examples of construction that is directly exposed to adverse weather conditions that cause concrete damage in the form of carbonation. damage such as concrete cover spalling, cracks on the surface of concrete walls, and corrosion of reinforcement, Conditions like this need to be handled seriously because they have an impact on the structural safety factor of the building. This study aims to determine the effect of carbonation on the concrete structure of the Geothermal Power Plant Cooling Tower Building on Mount Salak which has experienced degradation of concrete quality due to carbonation. Concrete Analysis method to determine the relationship of the effect of carbonation on concrete strength in the Cooling Tower structure uses Monte Carlo simulation method based on measurements of concrete cover and carbonation depth. Monte Carlo simulation results to estimate the carbonation rate of concrete showed an average of 2.4 cm per year for a simulation period of 25 years. The average carbonation of concrete obtained from probability is 2.28. By repeating the simulation, an average value close to the estimate will be obtained from the coefficient of determination test results of 48.1%. The effect exerted by concrete quality on concrete carbonation is negative, meaning that better concrete quality will reduce concrete carbonation.
PEMANFAATAN PANEL SURYA DAN GREENHOUSE SEBAGAI SOLUSI PERTANIAN MODERN DI GANG HIJAU SWAKARYA Dian Rusdiyanto; Dian Widi Astuti; Galang Persada Nurani Hakim; Ahmad Firdausi; Freddy Artadima Silaban; Agung Wahyudi Biantoro
Jurnal Abdi Insani Vol 13 No 6 (2026): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v13i6.4001

Abstract

This Community Service Program was conducted at Gang Hijau Swakarya Hydroponic Garden, Meruya Selatan Urban Village, Kembangan District, West Jakarta, with the aim of improving energy independence and urban agricultural productivity through the application of renewable energy technology and environmentally based crop protection systems. The activity began with a field observation to identify the main problems faced by the partner, namely a damaged solar power system and an open garden area without adequate protection from pests and dust. As a solution, the solar panel system was repaired and upgraded from six non-functional 100 Wp modules to eight 100 Wp modules, accompanied by the replacement of the panel box and the installation of two 12.8 V 100 Ah LiFePO₄ batteries connected in parallel to increase energy storage capacity. In addition, a 2 m × 11 m greenhouse covered with insect netting was constructed to maintain stable plant growth and protect crops from pest attacks and dust exposure. The program continued with training and mentoring for the partner and local community, covering an introduction to the solar panel system and hydroponic cultivation management. The questionnaire results showed an increase in participants’ knowledge and satisfaction regarding the use of solar energy and greenhouse construction. As the closing activity, the handover of the 2025 Kemdiktisaintek grant assets was conducted and witnessed by the Head of Meruya Selatan Urban Village.
Effectiveness Analysis of CCTV and Announcer on Accident Prevention In Construction OHS Culture Alfadin Azzahrawaani El Nauval; Agung Wahyudi Biantoro
Eduvest - Journal of Universal Studies Vol. 5 No. 10 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i10.51984

Abstract

This study aims to analyze the influence of Real-Time CCTV System, Announcer, Safety Leadership Program 4.0, and the work environment on Occupational Health and Safety (OHS) culture, as well as their impact on accident prevention in construction projects. The research adopts a quantitative approach using the Partial Least Squares Structural Equation Modeling (PLS-SEM) analysis technique. Data were collected through questionnaires distributed to respondents at construction sites and analyzed to test the validity, reliability, and relationships among variables in the structural model. The results indicate that the Safety Leadership Program 4.0 and the work environment have a significant influence on the development of an OHS culture. Meanwhile, the Real-Time CCTV System showed a near-significant influence, and the Announcer had no significant impact on OHS culture. Regarding accident prevention, the Real-Time CCTV System and Announcer demonstrated a direct and significant effect, while OHS culture, Safety Leadership Program 4.0, and the work environment did not show a significant direct influence. These findings suggest that technological approaches are more effective in providing immediate responses to potential hazards, whereas cultural development and leadership require more time and integrated strategies. In conclusion, this study highlights the importance of integrating technology, safety leadership, and a supportive work environment to build a strong OHS culture and sustainably reduce the risk of workplace accidents in construction projects.
Co-Authors A Hidayat Abdul Hamid Abdul Hamid Abdurrahman Auf Acep Hidayat Adinarto, Tri Wahyu Aditya Putra, Aditya Adnan, Mohd. Shalahuddin Bin Agus Supiyat Ahmad Firdausi Alfadin Azzahrawaani El Nauval Alief Avicenna Luthfie alif, irfan alif amat chaeroni Antonius Antonius Antonius antonius antonius Antonius Antonius Arif Kusnan Hidayanto Auf, Abdurrahman Bambang Darmono Basuki Dwi Effendy bin Muhd Noor, Nik Hisyamudin Budi Susetyo Cahyana, Babay J Chaeroni, Amat Citra, Zel D Vidayanti Dadang S. Permana Dafit Feriyanto Dedik Romahadi Desiana Vidayanti Dian Widi Astuti Dudi Subur rahman Effendy, Basuki Dwi Fadilla, Muhammad Riza Fahmi Hidayat Feleke, Aberham Genetu Freddy Artadima Silaban Galang Persada Nurani Hakim Gunawan, Jefri Hadi Pranoto Herol Herol Heru Maryanto Hidayanto, Arif Kusnan Indriany, Syilvia Iskendar Iskendar Jawu, Patricia Kanicia Kumbarasari, Shanti Maryanto, Heru Mawardi Amin Muhammad Isradi Nabila Afdal Nana Subarna, Nana Permana, D.S. Purbatin, Hari Rachmanu, Fatkur RB Abdul Majid Reni Karno Kinasih Rini Anggraini Risma Apdeni Rusdiyanto, Dian S Hidayat Subekti Subekti Subekti Subekti Subekti Subekti Sukardi, Indra Mahendra Z Citra