Article Per Year (5 Year)
p-Index From 2021 - 2026
0
P-Index
This Author published in this journals
All Journal Journal of Civil Engineering ELECTRON JISO : Journal of Industrial and Systems Optimization
Dwi Prasetya
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

Published : 5 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search

 1 
EVALUASI SISTEM PENTANAHAN INSTALASI LISTRIK RUMAH TINGGAL Dwi Prasetya; Asmar Asmar; Rudy Kurniawan
ELECTRON : Jurnal Ilmiah Teknik Elektro Vol 1 No 1 (2018): ELECTRON, November 2018
Publisher : Jurusan Teknik Elektro Fakultas Teknik Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/electron.v1i1.388

Abstract

Pentanahan merupakan bagian dari instalasi listrik rumah tinggal. Pemasangan instalasi listrik di Indonesia telah diatur sesuai dengan (Persyaratan Umum Instalasi Listrik PUIL 2000), dan peraturan lain yang mendukung. Sistem pentanahan bertujuan mengamankan peralatan-peralatan maupun instalasi listrik dengan cara mengalirkan arus gangguan ke tanah. Pentanahan yang sesuai standar yaitu untuk seluruh sistem tidak boleh lebih dari 5 ohm, dan untuk daerah yang resistansi jenis tanahnya tinggi, pentanahan total boleh mencapai 10 ohm. Tujuan dalam penelitian ini untuk mengetahui nilai tahanan pentanahan rumah tinggal yang terdapat di kecamatan Gabek kota Pangkalpinang dengan kondisi jenis lapisan tanah rawa. Teknik pengumpulan data yaitudengan pengamatan, dokumentasi dan pengukuran. Pengukuran menggunakan metode 62%. Sampel data yang digunakan yaitu perumahan penduduk dengan rincian, kelurahan Selindung 25 sampel dan kelurahan Selindung Baru 5 sampel. Hasil pengukuran, nilai tahanan pentanahan terendah 11 ohm, dan tertinggi 950 ohm. Berdasarkan analisis data statistik dan dengan menggunakan metode uji t satu sampel (one sample t test), hasil analisis dengan menggunakan t hitung dan t tabel serta tingkat signifikansi 95% maka H0 ditolak. Untuk selang kepercayaan 95% nilai tahanan pentanahan instalasi listrik rumah tinggal di kecamatan Gabek terletak diantara 134.0113 dan 325.1887 ohm.
PERENCANAAN PEMELIHARAAN MESIN PRODUKSI DENGAN MENGGUNAKAN METODE RELIABILITY CENTERED MAINTENANCE (RCM) (Studi Kasus: PT. S) Prasetya, Dwi; Ardhyani, Ika Widya
JISO : Journal of Industrial and Systems Optimization Vol. 1 No. 1 (2018): Desember 2018
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v1i1.7-14

Abstract

PT. S is a company that produces steel pipe. As a manufacturing company, the company relies heavily on its production machines, one of the main engines in this company is  mill 303. However, the high frequency of failure and downtime caused the production decreased. This research use reliability centered maintenance (RCM) method. This method is used to determine the machine maintenance schedule as well and the interval optimal time. The stages of this research begin with determining the critical machine then make the system description followed by FMEA analysis, ABC analysis to determine critical component, FTA analysis, analysis of time distribution up to interval optimum maintenance. The result of this research is known 11 critical component with highest RPN value. 11 components that have been identified then analyzed the distribution of the time to failure and distribution of the time to repair and get the value of MTTR and MTTF. Bearing drive roll is the component with the highest RPN value of 512, the MTTR value of 3.56259, the MTTF value of 730,537 and the optimal maintenance interval of 504.64 hours.
3D non-linear finite element analysis of concentrically loaded high strength reinforced concrete column with GFRP bar Adhi Dharma Prasetyo; Bambang Piscesa; Harun Alrasyid; Dwi Prasetya
Journal of Civil Engineering Vol. 35 No. 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i1.7421

Abstract

The use of High Strength Concrete (HSC) material in Reinforced Concrete (RC) column has become widely used.HSC was found to be durable, strong in compression, but it has low ductility. This low ductility of HSC can be improved byproviding confinement. However, for HSC with concrete strength higher than 70 MPa, additional clause for confinement in ACI318-19 generates denser arrangement of transverse bars and eventually creates weak planes between the concrete core and thecover. These weak planes can trigger early cover spalling. To reduce the utilization of confining bars, high-strength Glass FiberReinforce Polymer (GFRP) bar can be used. However, the performance of GFRP bar varies significantly from their uniaxialbehavior in tension or compression to the real performance when it is used as the main reinforcement. For that reason, thispaper tries to investigate the behavior of HSC RC column with bars made of conventional steel rebar and with GFRP bars. Dueto limited data on the strain gauge reading on the GFRP bars from the available test result, an inverse analysis is carried outto determine the best stress-strain curve for GFRP bars used as the main reinforcement. For that purpose, an inhouse finiteelement package called 3D-NLFEA is used. From the comparisons, it was found out that the peak load, softening behavior, andthe concrete core enhancement prediction agrees well with the test result. From the inverse analysis, only 25% and 45% of theGFRP bar yield strength can be deployed when loaded under compression and tension, respectively.
Strength reduction factor evaluation of the circular reinforced concrete column with varying eccentricity ratio (e/h) Wahyuniarsih Sutrisno; Mudji Irmawan; Dwi Prasetya
Journal of Civil Engineering Vol. 35 No. 1 (2020)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v35i1.7430

Abstract

This paper presents strength reduction factor evaluation of circular reinforced concrete column with varyingeccentricity ratio (e/h) using the first-order-reliability-methods. The resistance properties of the reinforced concrete column isestimated using the monte-carlo simulation with random normally distributed material properties. Only dead and live loadcombination considered in the analysis. The parameters being investigated when evaluating the resistance of the reinforcedconcrete column are the concrete compressive strength, steel yield strength, coefficient of variation for both the concrete andsteel materials, reinforced concrete column size, and the longitudinal reinforcement ratio. When evaluating the strengthreduction factor, the safety index values are 3.0, 3.5, and 4.0. From the analysis, it was found out that the strength reductionfactor, for e/h higher than one and with safety index equal to 3.0, was equal to 0.9 which agrees well with the ACI 318 strengthreduction factor for tension-controlled region. However, for e/h lower than one and safety index equal to 3.0, the strengthreduction factor was equal to 0.6 which was lower than the ACI 318 strength reduction factor for compression-compressioncontrolled region.
DUCTILITY EVALUATION OF REINFORCED CONCRETE COLUMN MADE OF NORMAL- TO HIGH-STRENGTH CONCRETE UNDER CONSTANT AXIAL LOAD LEVEL COMBINED WITH FLEXURAL LOADING USING NONLINEAR SECTIONAL FIBER BASED MODEL Bambang Piscesa; Dwi Prasetya; Mudji Irmawan; Harun Alrasyid
Journal of Civil Engineering Vol. 34 No. 1 (2019)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v34i1.7461

Abstract

This study presents the ductility evaluation of reinforced concrete column made of normal-strength material using various empirical stress-strain model with nonlinear sectional fiber based analysis. The purpose is to evaluate the confinement requirement for reinforced concrete column under high axial load level. The concrete strength considered in the analysis are varies from 30 to 70 MPa while the steel reinforcing bar yield strength considered is only 400 MPa. The ductility is evaluated by using the customized ductility index measurement. The ratio of the concrete cover to the concrete core is set to 0.1 but not more than 40 mm. Attard and Setunge’s concrete constitutive model is used in this investigation. Cover spalling behavior is considered in the analysis by including the restrained shrinkage effect on the concrete strength and the softening behavior. From this study, it was found that extra confinement is necessary to maintain the expected minimum level of ductility.
Co-Authors Adhi Dharma Prasetyo Asmar Asmar Bambang Piscesa Harun Alrasyid Ika Widya Ardhyani Mudji Irmawan Rudy Kurniawan Wahyuniarsih Sutrisno