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Jurnal SImetri Rekayasa
Published by Universitas Harapan Medan
ISSN : 2715890X     EISSN : 27165035     DOI : 10.35447
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Dalam Jurnal SIMETRI REKAYASA Membahas mengenai scope: Teknik Sipil Teknik Mesin Teknik Elektro Teknik Industri
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 83 Documents
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SIMULASI PENGONTROLAN DAN MONITORING ALIRAN MINYAK DENGAN MENGUBAH KECEPATAN POMPA Indra Roza; Teguh Vikriandi Tarigan; Ervin Panggabean
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Abstract

With the development of technology, then every industry is eager to make tools that can help employees and industrial management, one of which is a tool in the field of control. In the world of palm oil industry, oil control is needed to control the flow of oil to the plant. With automatic oil control, the oil flow rate to the plant can be controlled according to the needs of the plant. Currently there are still many palm oil industries that have not controlled the oil flow pump automatically. Although the industry includes a large industry, it still uses manual control. Then comes the idea to design the pump control automatically by using PLC. Here the test by raising and lowering the frequency for motor pump speed can change. From the test results that have dilakuakan can be concluded that a pump that is given a frequency greater than the frequency given by PLN, then the pump speed will increase according to the given by the PLN, then the pump speed will decrease according to the frequency given by the inverter. But if the pump is given a frequency smaller than the frequency frequency given by the inverter. In the simulation of controlling and monitoring the flow of oil by changing the speed of the pump can be applied in the industry, because the control in this way is very simple and can be applied in the palm oil industry
ANALISA PERBANDINGAN EFESIENSI PENGGUNAAN ENERGI LISTRIK ANTARA SUPPLAI LISTRIK PLN DAN GENSET DI RSU MUHAMMADIYAH SUMATERA UTARA Indra Roza; Agus Almi; Anas Dary Arinto; Pratowo Aji
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Abstract

Energy distribution of electricity to consumers are sometimes susceptible to interference, both internal and external threats. Due to a disturbance sometimes consumers feel particularly aggrieved General Hospital because it can disrupt the operational process including Muhammadiyah General Hospital. Therefore, a lot of the General Hospital that use generators as a backup energy when there is a sudden interruption of PLN. However, for the operation of the generator and energy costs are not small. This study aims to determine how much energy use efficiency ratio of the electric generator to the electricity energy in terms of technical and economical at the General Hospital in the North Sumatra Muhammadiyah Mandala By Pass Medan. Given the comparative assessment, expected General Hospital, North Sumatra Muhammadiyah can make efficient use of electrical energy so as to reduce financing for the electricity.
ANALISIS PENERAPAN PROGRAM KESELAMATAN KERJA DALAM USAHA MENINGKATKAN PRODUKTIVITAS KERJA DENGAN PENDEKATAN FAULT TREE ANALYSIS DAN HAZARD AND OPERABILITY STUDY Yetti Meuthia Hasibuan; Rini Halila Nasution; Uun Novalia Harahap; Rafika Apriani Pratiwi; Wan Krisman Hia
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Abstract

PT. Sumatra Hakarindo in its operation is not free from problems encountered such as work accidents, occupational diseases and the negative impact of the industry on the surrounding environment, so the level of human work safety as a factor of production is needed so that optimal productivity can be achieved. The application of work safety programs for workers is an important supporting effort in production activities. The work safety program system consists of several program elements and their supporters. In this study the measurement of the results of work safety efforts and the safe T value, the frequency level to express the number of accidents that occur every 1,000,000 hours worked from the employee's "work hours" home. The safe T value is a measurement that aims to compare the results of the accident reduction rate achieved for that work. From the implementation of the Occupational Health program at PT. Sumatra Hakarindo can be said to have been implemented quite well. Accidents that occurred in 2018 -2020 were 15,13,11 accidents. With a frequency rate from 2018-2020 it is 64.6; 49.9; 36,1. The severity level that occurred in 2016-2018 was 458.9; 284.2; 233,2. With a safe T value in 2018 it is known - 950.2 in 2019 it is - 1098.2. The decrease in accident rates and the severity of accidents from year to year will increase labor productivity.
Kajian Desain Struktur Balok Pada Gedung Bertingkat Berdasarkan SNI 2847:2013 pada Gedung Menara BRI Medan Yusrizal Lubis; Diana Suita
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

The BRI Medan Tower Building is a multi-storey building consisting of 12 floors and 2 basements, so that in planning the structure it must be designed to be strong and safe enough to withstand the load carried and withstand external influences on the structure. Previously, the BRI Medan Tower Building was a building with old design standards. Thus, this thesis aims to evaluate the design of beam structures in existing buildings based on SNI 2847:2013 concerning Requirements for Structural Concrete for Buildings. The method used is the beam analysis method using SNI 2847:2013. From the analysis results, it is found that the evaluation of beam analysis calculations obtained with the results in the field is the same. The installed compression reinforcement has not yielded so that the beam cross section is a tension controlled section. The flexural reinforcement distance in the beam is D10-200. The results of the evaluation of the beam analysis calculation obtained the amount of tensile reinforcement 14D25 and 4D25 and compression reinforcement 12D25 has been able to carry the load on the beam, so it can be concluded that the results of the planning have met the applicable requirements. SNI 2847:2013 can be used for planning reinforced concrete structures because the results obtained at the time of planning with the results in the field are the same.
PENGGUNAAN OLI BEKAS SEBAGAI BAHAN TAMBAH TERHADAP KARAKTERISTIK MARSHALL PADA DAUR ULANG OLI BEKAS Yusrizal Lubis; Kartika Indah Sari
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Recycling methods can be used to reduce road construction costs. One of the recycling methods is mixing asphalt with used oil (lubricating oil), this method has been used by several AMP (Asphalt Mixing Plate) companies for asphalt mixtures. However, there is no reference / reference for the percentage of the oil mixture that is commonly used as an asphalt mixture. It is feared that an inappropriate oil mixture will cause damage or make the asphalt mixture not according to the specified specifications such as the stability and flow value of the asphalt mixture. The method used is an experiment, where 15 test objects are made using asphalt pen 60/70 to determine the KAO, after the KAO value is obtained, then used oil is mixed with variations of 1%, 2%, and 3%. From this research, the value of Stability and Flow in used oil mixtures with a variation of 1% Used oil obtained a stability value of 1033,936 kg and a flow of 3,21 mm, with the addition of 2% used oil, a stability value of 1037,246 kg and a flow of 3,25 were obtained. mm, the addition of 3% used oil obtained a stability value of 1040,142 kg and a flow of 3,30 mm. As the variation of the mixture of Stability and Flow values ​​increases, the percentage of addition of used oil mixture at 1%, 2%, 3%, Stability and flow values ​​meet the 2010 general specifications (revision 3), where the stability value has a minimum of 800 and the flow value a minimum of 2 and a maximum of 4. From the results of the marshall test of used oil mixtures, which start from a variation of 1% to 3% seen from the marshall parameters and data processing, the variation that is used as the optimum asphalt content in used oil added ingredients is the used oil variation of 3%.
Pengaruh Lentur Balok Sloof Beton Bertulang Pada Struktur Kolam Renang Pada Apartement Mansyur Residence Kartika Indah Sari; Yusrizal lubis; Juli Ratna Sari
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

Reinforced concrete is a combination of concrete and steel reinforcement, which work together for the given load. Steel reinforcement will provide a strong tensile that is not owned by concrete. In the design of reinforced structures, the most important thing when doing the design is the loan that occurs due to the load that the structure is holding. Flexible concrete structures should be designed to have sufficient rigidity to limit borrowing that might weaken the strength or serviceability of the structure under working loads. The first step is analyzing reinforced concrete beams by calculating the external forces (Ultimate Moment) using the SAP2000 application with known materials from the data and working drawings, then comparing the results of the calculation of internal forces with the moment of resistance on materials with MuMn requirements. The calculation of the moment of resistance (Mn) is based on (SNI 2847: 2013). After calculating the Momentum and nominal limits, Mu = 9.0304 kN.m < Mn = 66,832 KN.m, so as to secure the construction of the concrete sloof against the loan.
Penataan Distribusi Air Permukaan untuk Efisiensi Penggunaan dan Pemanfaatan Air Di Desa Hamparan Perak Yudha Hanova; Rizky Franchitika
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

One of the efforts to increase the productivity of agricultural land in the Desa Lama is to manage surface water caused by excess rainwater. Arrangement of surface water on agricultural land will have a positive impact on plant growth because the water needs of plants can be fulfilled, especially in the dry season. The arrangement of the system aims to distribute surface water and rainwater evenly in agricultural areas. This study aims to analyze the arrangement of surface water on agricultural land with a catchment system as a medium for managing rainfall that falls so that farmers can utilize and distribute water to agricultural land by designing reservoirs. In the Desa Lama, Hamparan Perak District, Deli Serdang Regency. The method used in this study consists of, 1) Hydrological analysis such as analysis of maximum daily rainfall, return period rainfall, analysis of hourly rainfall distribution, and return period discharge. 2) Analysis of storage capacity. From the implementation of the design of the storage carried out in the field, it was obtained that the surface water storage capacity was 37.47 m3/s. Based on the hydrological analysis results, the storage capacity is the storage capacity for the 20 year return period.
Kajian Pondasi Sumuran pada Jembatan Bo'u Lahomi Kabupaten Nias Barat. Rizky Franchitika; Kartika Indah Sari; Yustinus Y.P Gulo
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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Abstract

The Bo'u Lahomi-West Nias Bridge is a bridge that spans 11.80 m. The sub-structure of the bridge consists of abutments and foundations. This evaluation was conducted to determine the bearing capacity of the well foundation and the safety factor against the working load along with an evaluation of the analysis of the amount of foundation reinforcement and pile cap. The safety factor for the bearing capacity of the well foundation is determined based on the comparison of the bearing capacity value of the well foundation > with the maximum load value that works on the foundation, while the safe factor for pile cap reinforcement and the well foundation is determined based on the strength value of the column > with the maximum load value received. In addition to field data, this analysis requires testing of soil parameters in the laboratory. The meters tested were specific gravity (Gs), filter analysis of moisture content, density, direct shear strength of the soil in the field. Based on the results of the analysis of the bearing capacity of the well foundation, it was found that the value of the bearing capacity of the pile foundation group was 2510,78 tons and the maximum load acting on the foundation was 1550,40 tons. 15 13, and shear reinforcement in the direction of X 10 – 140 and Y 10 – 100 and analysis of reinforcement on the well foundation obtained 35 D 19-250 principal reinforcement and spiral reinforcement 12 – 50 with a column strength of 7654.153 Ton > Pu = 1550.40 Tons, thus the bearing capacity of the well foundation on the bo'u bridge meets the requirements and is safe against the load received and the column cross-sectional design meets the requirements so that the size of the piles and reinforcement can be used.
Perbaikan Nilai CBR Tanah Lempung Lunak Dengan Stabilitas Dua Tahap dengan Menggunakan Abu Vulkanik Yusrizal Lubis; Diana Suita
Jurnal Simetri Rekayasa Vol 2 No 1 (2020): Article April 2020
Publisher : Universitas Harapan Medan

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Abstract

Soil with unfavorable characteristics often creates new problems, one of which is soft clay. Therefore, a soil improvement method is needed to change the characteristics of the soil. Two-stage stabilization using bukho rock ash and volcanic ash has the potential to overcome this problem. Based on the results of the study, the optimum CBR value was 9.245% from two-stage stabilization of soft clay soils with 12% bukho rock ash and 4% volcanic ash added. The addition of 6% bukho rock ash and 4% volcanic ash obtained 100% soil density. The addition of 9% bukho rock ash and 4% volcanic ash obtained 100% soil density. The addition of 12% bukho rock ash and 4% volcanic ash obtained 100% soil density. This shows that the effect of two-stage stabilization based on percentage variations can increase soil density.
Teoritikal Bentuk Bore Tsunami Menggunakan Metode Dambreak Dan Wavemaker Dengan Sistem DualSPHysics Kartika Indah Sari; Yusrizal Lubis; Ditya Andrean Supit
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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A tsunami is a large water wave with the impact of damage and destruction on facilities and infrastructure when it spreads to the mainland. In general, a tsunami approaching the coast forms a bore wave when a single uniform (solitary) wave in a tsunami breaks when it enters the coast. This research was conducted to determine the transition process of tsunami waves to form a bore, as well as to determine the characteristics of the tsunami bore shape. The bore tsunami research was carried out using the dambreak and wavemaker methods using the DualSPHysics simulation computational program, the dimensions of the open channel at the dambreak were 20.7 m x 1.43 m x 1.5 m. The beach modeling on the dambreak has dimensions of 12.7 m x 0.64 m with a slope of 1:20. The channel dimensions on the wavemaker are 135 m x 2 m x 5 m. The wavemaker beach model has dimensions of 60 m x 3 m with a slope of 1:20. The total number of particles in the dambreak simulation is 24,638,764. The simulation results provide information that the bore wave is the result of the transition of a solitary wave breaking as it approaches the shoreline. The wave height that was formed at the beginning of the formation will continue to increase in height until it approaches the shoreline

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