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ANALISIS PUSHOVER GEDUNG BLOK B PASAR SAWAHLUNTO Nugroho, Fajar; Andrano, Reza; Maizir, Maizir
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.23-34

Indonesia is a country with a high risk of earthquakes. Earthquake vibrations can cause ground shifts, which, in turn, affect building structures. To assess the level of risk for building damage, it is necessary to conduct a collapse scheme analysis and seismic performance evaluation of buildings. In this study, the author examined one of the earthquake-prone areas, Sawahlunto City, located in West Sumatra Province, Indonesia. The focus of the research is Block B of the Sawahlunto Market, a building that serves as a hub for community economic activities. The analysis employed is pushover analysis. The research methods include data collection, load calculations, 3D modeling, and static pushover analysis. Structural modeling was carried out using SAP2000 software. The structural performance level was evaluated based on SNI 1726-2019 and ATC-40 standards, and the mechanism of structural collapse was analyzed using plastic hinge formation. The analysis results show that the capacity curves in the X and Y directions have almost identical shapes, indicating that the structural stiffness along both axes is nearly the same. The performance points in the X and Y directions classify the building structure under the immediate occupancy category. This indicates that the building is highly capable of withstanding earthquakes with no significant damage.

Coral Reef Status after the 2018 Sunda Strait Tsunami Using the CPCe Program: A Case Study of Tanjung Lesung Banten Anzani, Luthfi; Minsaris, La Ode Alam; Wilujeung, Alya Dina; Rahardjo, Cakra; Hasidu, La Ode Fajar; Nugroho, Fajar
Jurnal Perikanan dan Kelautan Vol. 28 No. 1 (2023): February
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Tsunami that swept the Tanjung Lesung coast in 2018 caused Anak Krakatau to collapse in Sunda Strait which hit the coastal areas of Banten and Lampung. Tanjung Lesung is one of the worst areas affected. Tsunami in Tanjung Lesung has taken lives, damaged infrastructure, and caused terrible natural damage. One of the damages affecting residents' lives in the Tanjung Lesung coastal community is exposure to the marine ecosystem. The main ecosystem that has the highest productivity level is the coral reef. Coral biota is the main benthic biota of reefs that are directly affected by earthquakes and tsunamis. However, until now there has been no data on the status of coral reefs after the 2018 Sunda Strait tsunami. Therefore, researchers feel the urgency of this research is high enough to determine the condition of coral reefs after the Sunda Strait tsunami in Tanjung Lesung. There are 3 research stations for data collection before the tsunami, and we conduct research in those 3 stations again after the tsunami. Then we added 3 research stations again, so there are 6 research stations. Observation of coral reefs uses the Line Intercept Transect (LIT) method. The line transect is made by stretching a roll meter with a scale parallel to the coastline along 25 meters with three replications with an interval of about 0-5 meters between replications so the total observed transect was 75 meters. The deterioration of coral reef conditions at three research stations (1-3) proved that the tsunami waves affected the damage to coral reefs. This has an impact on the diversity of coral reef species inhabitants that have decreased. Disturbance form coral-damaged structure and composition changes of the base substrate as habitat can have an impact on reef fish and coral reef inhabitants. So that this research is expected to be a reference for policymakers in determining rehabilitation steps for areas affected by the 2018 Sunda Strait tsunami.

MANAJEMEN PRODUKSI PESAWAT TERBANG TANPA AWAKUNTUK MENUNJANG KEMANDIRIAN INDUSTRIPERTAHANAN Subarjo, Abdul Haris; Setiabudi, Dedet Hermawan; Santoso, Djarot Wahju; Nugroho, Fajar; Retnowati, Nurcahyani Dewi
Hikamatzu | Journal of Multidisciplinary Vol. 1 No. 2 (2024): multi science and knowlegde
Publisher : Hikamatzu | Journal of Multidisciplinary

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

Bangsa Indonesia memiliki keinginan untuk membangun suatu industri pertahanan yang kuat dan mandiri tidak bergantung pada Bangsa lain. Dengan Manajemen Industri pertahanan yang kuat dan mandiri maka kedaulatan dan kewibawaan suatu negara berpengaruh dalam mempertahankan negaranya. Undang-Undang RI no.16 Tahun 2012 menyatakan industri pertahanan meliputi empat bidang yaitu industri alat utama, industri komponen utama dan penunjang, industri komponen dan pendukung serta industri bahan baku. Salah satu produk industri alat utama pengembangan dan produksi Pesawat Terbang Tanpa Awak oleh Badan Usaha Milik Negara (BUMN) dan Badan Usaha Milik Swasta (BUMS). Untuk itu maka diperlukan manajemen produksi UAV pada industri dalam negeri tersebut dalam mendukung kemandirian industri pertahanan menjadi objek penelitian. Penelitian menggunakan metode kualitatif dengan pendekatan studi pustaka. Metode penelitian kualitatif dapat menyediakan data yang kaya dan holistik, menyediakan pemahaman atas proses yang berkelanjutan, berfokus pada studi pustaka dalam konteks tertentu, menginterpretasikan dan menjelaskan lebih dalam mengenai data kualitatif. Data-data yang diperoleh dikondensasi dan dianalisis menggunakan teknik analisis deskripsi kualitatif.

Coral Reef Status after the 2018 Sunda Strait Tsunami Using the CPCe Program: A Case Study of Tanjung Lesung Banten Anzani, Luthfi; Minsaris, La Ode Alam; Wilujeung, Alya Dina; Rahardjo, Cakra; Hasidu, La Ode Fajar; Nugroho, Fajar
Jurnal Perikanan dan Kelautan Vol. 28 No. 1 (2023): February
Publisher : Faculty of Fisheries and Marine, Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Tsunami that swept the Tanjung Lesung coast in 2018 caused Anak Krakatau to collapse in Sunda Strait which hit the coastal areas of Banten and Lampung. Tanjung Lesung is one of the worst areas affected. Tsunami in Tanjung Lesung has taken lives, damaged infrastructure, and caused terrible natural damage. One of the damages affecting residents' lives in the Tanjung Lesung coastal community is exposure to the marine ecosystem. The main ecosystem that has the highest productivity level is the coral reef. Coral biota is the main benthic biota of reefs that are directly affected by earthquakes and tsunamis. However, until now there has been no data on the status of coral reefs after the 2018 Sunda Strait tsunami. Therefore, researchers feel the urgency of this research is high enough to determine the condition of coral reefs after the Sunda Strait tsunami in Tanjung Lesung. There are 3 research stations for data collection before the tsunami, and we conduct research in those 3 stations again after the tsunami. Then we added 3 research stations again, so there are 6 research stations. Observation of coral reefs uses the Line Intercept Transect (LIT) method. The line transect is made by stretching a roll meter with a scale parallel to the coastline along 25 meters with three replications with an interval of about 0-5 meters between replications so the total observed transect was 75 meters. The deterioration of coral reef conditions at three research stations (1-3) proved that the tsunami waves affected the damage to coral reefs. This has an impact on the diversity of coral reef species inhabitants that have decreased. Disturbance form coral-damaged structure and composition changes of the base substrate as habitat can have an impact on reef fish and coral reef inhabitants. So that this research is expected to be a reference for policymakers in determining rehabilitation steps for areas affected by the 2018 Sunda Strait tsunami.

PENGARUH PENAMBAHAN SILIKA FUME TERHADAP KUAT TEKAN BETON A, Arman; Mulyati, Mulyati; Nugroho, Fajar; Fakhrizal, Fakhrizal; Fadhil Azman, Hanif
Jurnal Teknologi dan Vokasi Vol 2 No 1 (2024): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2024.2.1.9-16

The development of technology in Indonesia is currently experiencing a fairly rapid development, especially in the construction sector. Concrete is one of the construction materials that is often used in various types of construction such as buildings, bridges, roads, dams and other civil infrastructure. Concrete consists of a mixture of coarse aggregate, fine aggregate, cement, water and sometimes concrete can also be added with chemicals and non-chemicals in certain ratios. Therefore, this study aims to determine the effect of the addition of Silica fume on the compressive strength of concrete. In this study using Silica fume with percentages of 0%, 4%, 7%, and 10% of the cement weight with 1 sample for each percentage. Examination of the physical properties of the concrete material is carried out in the Civil Engineering laboratory of ITP and testing of the compressive strength of concrete is carried out in the laboratory of the Department of Public Works. This research uses the standard material of SNI 7656-2012. The test object used is a steel cylinder with a diameter of 150 mm x a height of 300 mm. Based on the results of the compressive strength test of concrete carried out at the Department of Public Works laboratory at the age of 28 days from normal concrete, the compressive strength value was 27.03 MPa, concrete with the addition of 4% Silica fume experienced an increase in compressive strength of 1.59% with the obtained value The compressive strength is 27.46 MPa, the concrete with the addition of 7% Silica fume has decreased the compressive strength by 8.38% with the obtained compressive strength value of 24.76 Mpa, and the concrete with the addition of 10% Silica fume has decreased the compressive strength by 26.89% with the obtained compressive strength value of 19.76 Mpa. From this data it is known that the optimum compressive strength value is obtained with the addition of 4% Silica fume, which is 27.46 Mpa. After conducting this research, it can be concluded that the addition of Silica fume to the mixture for making concrete can be carried out with the provisions for the addition of Silica Fume below 4% of the weight of cement.

ANALISIS PUSHOVER GEDUNG BLOK B PASAR SAWAHLUNTO Nugroho, Fajar; Andrano, Reza; Maizir, Maizir
Jurnal Teknologi dan Vokasi Vol 3 No 1 (2025): Jurnal Teknologi dan Vokasi
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jtv.2025.3.1.23-34

Indonesia is a country with a high risk of earthquakes. Earthquake vibrations can cause ground shifts, which, in turn, affect building structures. To assess the level of risk for building damage, it is necessary to conduct a collapse scheme analysis and seismic performance evaluation of buildings. In this study, the author examined one of the earthquake-prone areas, Sawahlunto City, located in West Sumatra Province, Indonesia. The focus of the research is Block B of the Sawahlunto Market, a building that serves as a hub for community economic activities. The analysis employed is pushover analysis. The research methods include data collection, load calculations, 3D modeling, and static pushover analysis. Structural modeling was carried out using SAP2000 software. The structural performance level was evaluated based on SNI 1726-2019 and ATC-40 standards, and the mechanism of structural collapse was analyzed using plastic hinge formation. The analysis results show that the capacity curves in the X and Y directions have almost identical shapes, indicating that the structural stiffness along both axes is nearly the same. The performance points in the X and Y directions classify the building structure under the immediate occupancy category. This indicates that the building is highly capable of withstanding earthquakes with no significant damage.

Coral Reef Status after the 2018 Sunda Strait Tsunami Using the CPCe Program: A Case Study of Tanjung Lesung Banten Anzani, Luthfi; Minsaris, La Ode Alam; Wilujeung, Alya Dina; Rahardjo, Cakra; Hasidu, La Ode Fajar; Nugroho, Fajar
Jurnal Perikanan dan Kelautan Vol. 28 No. 1 (2023): February
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Tsunami that swept the Tanjung Lesung coast in 2018 caused Anak Krakatau to collapse in Sunda Strait which hit the coastal areas of Banten and Lampung. Tanjung Lesung is one of the worst areas affected. Tsunami in Tanjung Lesung has taken lives, damaged infrastructure, and caused terrible natural damage. One of the damages affecting residents' lives in the Tanjung Lesung coastal community is exposure to the marine ecosystem. The main ecosystem that has the highest productivity level is the coral reef. Coral biota is the main benthic biota of reefs that are directly affected by earthquakes and tsunamis. However, until now there has been no data on the status of coral reefs after the 2018 Sunda Strait tsunami. Therefore, researchers feel the urgency of this research is high enough to determine the condition of coral reefs after the Sunda Strait tsunami in Tanjung Lesung. There are 3 research stations for data collection before the tsunami, and we conduct research in those 3 stations again after the tsunami. Then we added 3 research stations again, so there are 6 research stations. Observation of coral reefs uses the Line Intercept Transect (LIT) method. The line transect is made by stretching a roll meter with a scale parallel to the coastline along 25 meters with three replications with an interval of about 0-5 meters between replications so the total observed transect was 75 meters. The deterioration of coral reef conditions at three research stations (1-3) proved that the tsunami waves affected the damage to coral reefs. This has an impact on the diversity of coral reef species inhabitants that have decreased. Disturbance form coral-damaged structure and composition changes of the base substrate as habitat can have an impact on reef fish and coral reef inhabitants. So that this research is expected to be a reference for policymakers in determining rehabilitation steps for areas affected by the 2018 Sunda Strait tsunami.

Analisis CFD Aliran Dua-Fasa Uap Air pada Pipa Geothermal Horisontal Kumolosari, Eli; Dinaryanto, Okto; Wibowo, Teguh; Setiabudi, Dedet Hermawan; Nugroho, Fajar; Pinandhita, Lazuardy Rahendra; Kurniawan, Freddy
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 1 (2025): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i1.2647

Two-phase flow is a phenomenon that often found in various devices and fields, one of which is in the geothermal system. Two-phase flow parameters that are important to study include flow patterns, pressure drop, and water holdup. This study used the CFD method to obtain data on flow patterns, pressure drop, and water holdup in steam-water flow in horizontal pipes. Validation studies were conducted to obtain appropriate settings. The superficial velocities of steam and water were varied from 6-30 m/s and 0.05-0.1 m/s respectively. The results showed that the CFD results were in accordance with the experiments. Visually, the observed flow patterns were stratified-wavy flow and mist flow. Furthermore, the pressure drop and water holdup values obtained increased along with the increase in the JW value.

Coral Reef Status after the 2018 Sunda Strait Tsunami Using the CPCe Program: A Case Study of Tanjung Lesung Banten Anzani, Luthfi; Minsaris, La Ode Alam; Wilujeung, Alya Dina; Rahardjo, Cakra; Hasidu, La Ode Fajar; Nugroho, Fajar
Jurnal Perikanan dan Kelautan Vol. 28 No. 1 (2023): February
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Tsunami that swept the Tanjung Lesung coast in 2018 caused Anak Krakatau to collapse in Sunda Strait which hit the coastal areas of Banten and Lampung. Tanjung Lesung is one of the worst areas affected. Tsunami in Tanjung Lesung has taken lives, damaged infrastructure, and caused terrible natural damage. One of the damages affecting residents' lives in the Tanjung Lesung coastal community is exposure to the marine ecosystem. The main ecosystem that has the highest productivity level is the coral reef. Coral biota is the main benthic biota of reefs that are directly affected by earthquakes and tsunamis. However, until now there has been no data on the status of coral reefs after the 2018 Sunda Strait tsunami. Therefore, researchers feel the urgency of this research is high enough to determine the condition of coral reefs after the Sunda Strait tsunami in Tanjung Lesung. There are 3 research stations for data collection before the tsunami, and we conduct research in those 3 stations again after the tsunami. Then we added 3 research stations again, so there are 6 research stations. Observation of coral reefs uses the Line Intercept Transect (LIT) method. The line transect is made by stretching a roll meter with a scale parallel to the coastline along 25 meters with three replications with an interval of about 0-5 meters between replications so the total observed transect was 75 meters. The deterioration of coral reef conditions at three research stations (1-3) proved that the tsunami waves affected the damage to coral reefs. This has an impact on the diversity of coral reef species inhabitants that have decreased. Disturbance form coral-damaged structure and composition changes of the base substrate as habitat can have an impact on reef fish and coral reef inhabitants. So that this research is expected to be a reference for policymakers in determining rehabilitation steps for areas affected by the 2018 Sunda Strait tsunami.

PENGARUH PENAMBAHAN ABU AMPAS KULIT JAGUNG TERHADAP KUAT TEKAN DAN PENYERAPAN AIR PAVING BLOCK Misbah, Misbah; Nugroho, Fajar; Arman A, Arman A; Rinaldi, Donni
Ensiklopedia of Journal Vol 7, No 4 (2025): Vol. 7 No. 4 Edisi 1 Juli 2025
Publisher : Lembaga Penelitian dan Penerbitan Hasil Penelitian Ensiklopedia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33559/eoj.v7i4.3242

Paving block is one of the construction productions commonly used for pavement, yards, sidewalks, and others. Paving block molds in rectangular shape with a size of 20 cm × 10 cm × 6 cm as many as 36 pieces of plan quality, which is 8.5 MPa. Paving block printing using hydraulic press. The percentage of corn husk pulp ash as a substitute for cement is 0%, 2%, 4%, 6%, 8% with a mixture of 1 cement: 3 sand. Paving blocks are tested at 28 days of age and tested for compressive strength and water absorption. For compressive strength testing, paving blocks are cut into cube shapes measuring 5 cm × 5 cm × 5 cm, and tested using Unit Testing Machine (UTM) compressive testing equipment, while for water absorption testing on paving blocks using the initial mold size. In this study, a normal paving block compressive strength value of 2.19 MPa was obtained. The highest compressive strength value is obtained in 2% incremental variation with a compressive strength value of 2.03 MPa. As for normal paving block water absorption, an absorption value of 813.30% was obtained. The smallest water absorption value is obtained in a variation of 4% addition, which is 10.70%. Keywords: Paving Block, Corn Husk Pulp Ash, Strong Compression, Water Absorption

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