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Jurnal Ilmiah Dinamika Rekayasa (DINAREK)
Published by Universitas Jenderal Soedirman
ISSN : 18583075     EISSN : 25276131     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering
DINAREK is a scientific journal published by Engineering Departement of Jenderal Soedirman University. DINAREK is a peer reviewed nasional journal in Indonesian, published two issues per year (February and August). DINAREK is to publish high-quality articles dedicated to all aspects of the latest outstanding developments in the field of engineering. Its scope encompasses the engineering of signal processing, electrical (power), electronics, instrumentation & control, telecommunication, Geological Engineering, Civil Engineering, Computing and informatics, and Industrial Engineering.
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Articles 270 Documents
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Analisis Deformasi Vertikal Dan Horisontal Tanah Lunak Di Bawahpiled-Geogrid Supported Embankment Adhe Noor Patria
Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.2.33

Abstract

Soft soil was easily founded in Indonesia. it was a low permeability soil. Constructing building such as embankment, roads on this kind of soil often faced problems. They were long term settlement, long term construction time and consolidation. Some method could be good alternative to overcome these problems such the usage of vertical drains, soil reinforcement, orsoil stabilization. This research carried out numerical simulation on piled-geogrid supported embankment. The simulation used Plaxis version 7.2 software to calculate some iterations. Used in this software as soil parameter input was Mohr-Coulomb Soil Model. Plane strain model was used for floating piles and geogrid. The results showed that the usage of floating piles and geogrid could reduce soil deformation. The reduction in horizontal deformation during contructing embankment were 60 to 68 % for rigid embankment and 80 to 60 % for interface embankment. Meanwhile the reduction in vertical deformation during contructing embankment were 60 to 65 % for rigid embankment and 80 to 65 % for interface embankment..
Optimasi Operasi Pembangkit Listrik Tenaga Air (PLTA) Menggunakan Linear Programming Dengan Batasan Ketersediaan Air Winasis Winasis; Hari Prasetijo; Giri Angga Setia
Dinamika Rekayasa Vol 9, No 2 (2013): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2013
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2013.9.2.67

Abstract

One of hydro power plant operational problem is how to maximize available water resouces to gather optimal electric power generation. Water availability which is limited and can be stored in a reservoir will influence electrical energy generated by the plant. This paper present a new approach of short term optimization of hydro power plant operation. The objective function is to maximize energy which is produced by power plant on scheduling operation period, with consider water resource availability in reservoir as operational constraint. The optimization problem is formulated in Linear Programming Method, in which this method is a commonly used to solve optimization problem in hydro power plant. Based on simulation results on Ketenger Hydro Power Plant using water flow data on June 1st 2013 shows that this method can be used to solve hydro power plant operation optimization problem well. Electrical energy as main objective function is maximized and all prevailing constrain is satisfied. On this short term operation (24 hour) simulation, total energy can be produced is 96121,55 kWh, or 1427 kWh (1,51%) greater comparing with real generation condition with 96694 kWh.
Pemanfaatan Sedimen Waduk Mrica Untuk Bahan Baku Bata Merah Nastain Nastain; Paulus Setyo Nugroho
Dinamika Rekayasa Vol 5, No 2 (2009): Dinamika Rekayasa - Agustus 2009
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2009.5.2.24

Abstract

Volume of water storage reservoir conditions Mrica from year to year decreases due to sedimentation. Efforts to reduce sediment in the reservoir has been done by way of flushing (flushing) periodically through the drawdown culvert (DDC), where the outcome is less effective and causes a lot of losses. This research was conducted in order to exploit the reservoir sediments Mrica for raw materials of red brick as an alternative effort to reduce sediment in the reservoir, as well as empowerment of communities around the reservoirs. Methods of research carried out by making a brick specimens made from sediments that were collected at the upstream, middle and downstream of the reservoir storage area. Laboratory tests conducted to determine the physical characteristics of sediment and the characteristics of the bricks produced. The results showed that: (1) Sediment basin headwaters Mrica coarse-textured sand with a sand content of 53%, the middle area is a sand-textured sand content of 62%, and the downstream region of 69% silt-textured with fine sand content of 31% , (2) Sediment that can be molded into bricks is a sedimentary rock containing 40% sand, with the color after the fire is reddish brown and smell of the less savory, (3) Depreciation is the largest dimension of the brick after the fire occurred on the bricks that  were made of sediment downstream areas, ie an average of 21%, and (4) The compressive strength of bricks produced very little that is equal to 0.5% of the minimum standards required by the SNI 15-2094-2000.
Pengaruh Beban Kendaraan sebagai Beban Terbagi Rata terhadap Deformasi Geogrid sebagai Perkuatan Embankment Adhe Noor Patria
Dinamika Rekayasa Vol 8, No 1 (2012): Dinamika Rekayasa - Februari 2012
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2012.8.1.57

Abstract

Soft soil such as clay was sensitive soil. Public contructions built in this kind of soil would face some problemssuch as long period consolidation time, unstable embankment slope, not easily compacted and high level settlement. Some solution that could be suggested were the usage of vertical drain, or the usage of geosynthetics material such as geogrid combined with floating  piles.Analysis was carried out by using plaxis version 7.2. soil for embankment and embankment foundation was modelled in plane strain. Also geogrid andfloating piles were modelled in palne strain too. Surcharge load on top of embanknet were variated, they were 20, 35 and 50 kPa. The simulation was carried out in staged contruction mode.Final vertical displacement in geogrid due to 50  kPa vehicle load as surcharge load and long term load period (in this case excess pore water pressure was small) was -0,9062 m for  rigid embankment and -1,4206 for interface embankment. The difference occured due to slip at the interface of geogrid and soil. It  leaded to adding soil mass supportd by geogrid, furthermore the deflection of geogrid became bigger.
Efektifitas Wire Rope Sebagai Perkuatan padaDaerah Momen Negatif Balok Beton Bertulang Tampang T Yanuar Haryanto
Dinamika Rekayasa Vol 7, No 2 (2011): Dinamika Rekayasa - Agustus 2011
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2011.7.2.47

Abstract

The loss due to collapsing structure includes not only materialsbutalso take lives. In thecase of structure function changing that may cause increasing loads, it is required to put efforts instrengtheningthe structure elements in order to increase the capacity and hence to avoid the possibility of collapsing. The objective of this research was to study thebehavior of T-sectional reinforced concrete beamstrengthenedin the negative momentregionwithwire rope and mortar composite. The test was carried out to three T-sectional beams: without wire rope reinforcement (BK), with 2 wire rope reinforcements (BP1), and with 4 wirerope (BP2) reinforcements. The type of wire rope was Independent Wire Rope Core (IWRC) with10 mm diameter. The testing method used was two points static loading with flens positions below (the flens part experienced tensile stress). Results showed that the maximum load carryingcapacity of BP1 and BP2 specimens increased by ratios of 1.59 and 2.03 to the BK specimen respectively. However, the increase was achievedafter the development and propagation of highcracking. Ductility of BP1 and BP2 specimens decreased by ratios of 0.62 and 0.36 to the BK specimen respectively. The initial stiffness of BP1 and BP2 increased byratios of 1.09 and 1.08 to the BK specimen respectively.The effective stiffness ofBP1 and BP2 specimensdecreased by ratios of 0.88 and 0.92 to the BK specimenrespectively. Stress occurred in the wire rope based on the analysis results of Response-2000 and the layer method have not reached 50% ofthe ultimate stress resulted from the preliminary test. In general, unless improvement was given to the stiffness characteristics of thewire rope, its contribution would not become optimum.
Penentuan Supplier Resin Dengan Menggunakan Analytical Network Process Septian Ricky Adi Pratama; Dwi Iryaning Handayani; Yustina Suhandayani
Dinamika Rekayasa Vol 11, No 1 (2015): Jurnal Ilmiah Dinamika Rekayasa - Februari 2015
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2015.11.1.91

Abstract

Pengambilan keputusan multikriteria adalah proses pemilihan suatu alternatif terbaik dari beberapa allternatif yang ada berdasarkan sejumlah kriteria dari suatu permasalahan. Pemilihan supplier yang terjadi pada PT. KTI divisi particle board selama ini hanya bersifat objektif, sehingga terjadi berbagai permasalahan didalam produksi yang disebabkan kualitas bahan baku (resin) tidak sesuai dengan standar yang ditetapkan perusahaan. Selain itu terjadi keterlambatan pengiriman, hal ini berpengaruh terhadap umur resin (live time resin) dimana kualitas resin juga akan menurun. Masalah yang lain ialah mengenai respon atau tanggapan dari supplier terhadap keluhan-keluhan perusahaan. Setiap supplier resin memiliki kekurangan dan kelebihan dalam setiap kriterianya, ada 4 kriteria yang harus dipenuhi setiap supplier resin yaitu kualitas (Quality), pengiriman (Delivery), respon (Responsiveness) dan harga (Cost). Penelitian ini memodelkan hubungan saling mempengaruhi dan dependency antar kriteria dan alternatif supplier, menerjemahkan preferensi pengambilan keputusan dalam bentuk skala numeric dan mensintensis hasil berupa prioritas alternatif supplier. Metode ANP digunakan untuk memodelkan hubungan tersebut dan mendapatkan prioritas dari penilaian pengambil keputusan dengan pembentukkan super matriks. Super matriks didapatkan dari perbandingan berpasangan elemen yang dipengaruhi terhadap elemen yang mempengaruhinya. Hasil yang diperoleh adalah bobot prioritas global untuk alternatif supplier yang menunjukkan urutan terpilihnya. Suppiler PT PAI menduduki peringkat pertama, diikuti supplier PT. DOVER, dan urutan ketiga  PT. ARUKI dan urutan keempat AICA.
Perkuatan Fondasi Telapak Dengan Turap Sumiyanto Sumiyanto; Paulus Setyo Nugroho
Dinamika Rekayasa Vol 5, No 1 (2009): Dinamika Rekayasa - Februari 2009
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2009.5.1.15

Abstract

Reinforcement Foundation is a method to increase the capacity of supporters, so they can support the load of the building. This is required for buildings located on soft ground. Strengthening this foundation is also needed if the structure above will be increased so that the burden of building work increased. In this study, attempted to strengthen the foundations of the method by placing the sheet piles on the side of the foundation. Tests performed on two-dimensional model in the laboratory, by comparing the carrying capacity of  the foundation with sheet piles and without sheet piles. Strengthening the foundation carried out with 3 (three) length variation of plaster  that is: L / B = 0.75, L / B = 1.00 and L / B = 1.25. B, and 3 (three) variations in the location of plaster, which is in distance S / B = 0.5, S / B = 1.0 and S / B = 1.5. Test results showed that the installation of sheet piles can increase the capacity of foundation support. The results of this study showed the longer the higher the sheet piles supporting capacity building, with the results of 33%, 55% and (80% -100%), one each for L / B = 0.75; 1.00 and 1.25. However, increased capacity is not much influenced by the location of plaster especially for short plaster of L / B = 0,75 and L / B = 1,00. While for L / B =1,25, where the sheet piles getting close to the foundation, increase capacity increased as well.
Analisis Kerja Rele Overall Differential pada Generator Unit I PLTA Ketenger PT Indonesia Power UBP Mrica Hari Prasetijo; Firman Arif Romadhona
Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.2.38

Abstract

Plant has two important equipment that are the generator and transformer. Therefore, it should be protected well by the overall differential relay. This relay must be reliable from the disturbances that might arise. In this study a simulation was conducted to obtain and test the overall differential relay setting at generator unit 1 PLTA Ketenger. Modelling was done with MATLAB Simulink 7.0.1 to check the overall differential relay protection system from potentialproblems. The model was given several disturbances, namely 1) short circuit fault in the security area, 2) short circuit fault outside the security area, and 3) lightning disturbances when damaged arrester. From the simulation results, the overall differential relay operating current is 1.73 A (primary side) and 1.64 A (secondary side). The results show that the overall differential relay provides a good response, except in the lightning fault with a current above 9x109 A (going the mismatch). For handlingthis problem another arrester should be added.
Penurunan Nilai Half Cell Potential Beton dengan Bahan Tambah FlyAsh dan Ca(C18H35O2)2 Maryoto, Agus
Dinamika Rekayasa Vol 10, No 2 (2014): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2014
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2014.10.2.82

Abstract

Serangan korosi pada tulangan baja di dalam beton bertulang dapat diinisiasi oleh ion klorida. Semakin banyak ion klorida yang meresap ke dalam beton, laju korosi pada beton bertulang semakin tinggi. Tingkat Ke-potensi-an korosi ini bisa diukur dengan melakukan uji half cell potential. Fly ash merupakan bahan yang mempunyai butir lebih halus dibanding semen mampu memperkecil diameter kapiler beton. Sementara itu senyawa stearate bila diaplikasikan pada beton mampu meningkatkan ke-hydrophobic-an beton. Studi ini meneliti tentang pengaruh penggunaan fly ash dan calcium sterarate / Ca(C18H35O2)2 pada beton. Investigasi ini menggunakan benda uji balok beton bertulang ukuran 11.4 x 15.2 x 28.0 cm sebanyak 15 buah. Baja tulangan yang digunakan merupakan baja ulir diameter 16 mm. Dua buah tulangan dalam balok beton bertulang yang terletak dibawah berfungsi sebagai katoda dan satu buah tulangan yang terletak di atas berfungsi sebagai anoda. Hasil uji half cell potential menunjukkan bahwa beton dengan kandungan fly ash dan calcium stearate dapat menurunkan tingkat kepotensian beton dari serangan korosi. 
Prediksi Sudut Gesek Internal Tanah Berdasarkan Sudut Dilatasi Pada Uji Geser Langsung Sumiyanto Sumiyanto; Gandjar Pamudji; Hery Awan Susanto
Dinamika Rekayasa Vol 1, No 1 (2005): Dinamika Rekayasa - Agustus 2005
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2005.1.1.4

Abstract

Shear strength parameters of soils are cohesion (c) and internal friction angle (�). Direct shear test is a method to determine these parameters. Data from this test are shear stress and thickness change of soil. In practice, only the maximum shear stress will used to determine the shear strength parameter. The major objective of this research is to develope a formula for prediction internal friction angle (ϕ) by dilatation angle (α). Result of this research is a prediction formula of internal friction angle, as : α = arctan (µ + tan α)/(1- µ tan α  by µ= 0,55. Dilatation angle (α) for this formula was determined at maximum shear stress.. Validations of ϕ predicted by this formula have maximum error 16,76%, average error 5,59% and standard deviation error 4,75%. Cohesion (c) values can calculated by Mohr-Coloumb Formula.

Page 8 of 27 | Total Record : 270

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