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All Journal TEKNIK Rotasi MEDIA KOMUNIKASI TEKNIK SIPIL JURNAL KARYA TEKNIK SIPIL Al-Jami'ah: Journal of Islamic Studies Semesta Teknika Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Journal of Geoscience, Engineering, Environment, and Technology Teras Jurnal Turbo : Jurnal Program Studi Teknik Mesin BERDIKARI : Jurnal Inovasi dan Penerapan Ipteks Indonesian Journal of Islamic Literature and Muslim Society Rang Teknik Journal SIKLUS: Jurnal Teknik Sipil Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Adabiyyat: Jurnal Bahasa dan Sastra Journal of Mechanical Engineering The International Conference on Education, Social Sciences and Technology (ICESST) Eduvest - Journal of Universal Studies Warta LPM Jurnal Teknik Sipil
Sukamta Sukamta
Departemen Teknik Sipil FT. UNDIP Jl. Prof. H. Soedarto SH., Tembalang, Semarang 50275
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Karakteristik Pembakaran Briket Kokas Lokal Pada Beberapa Temperatur Karbonasi Setiabudi, Dedet Hermawan; Himawanto, Dwi Aries; Sukamta, Sukamta
Jurnal Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Jurnal Semesta Teknika

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Abstract

In order to investigate the better carbonization process that used in foundry application, this research was performed the materials of this research are the local coke that usually used in Ceper Klaten. This local coke was pressed into cylindrical shape and then carbonize in the three variation  carbonized temperature i.e. 100 0C, 200 0C  and 300 0C as long as one hour then taken into furnace to find the combustion characteristics.The result shows that carbonization process has the optimal temperature.
Karakterisasi Aliran Uap-Kondensat pada Saluran Mendatar Berdasarkan Pengukuran Temperatur Sukamta, Sukamta; Indarto, Indarto; Purnomo, Purnomo; Rokhmat, Tri Agung
Jurnal Semesta Teknika Vol 17, No 1 (2014): MEI 2014
Publisher : Jurnal Semesta Teknika

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Abstract

The objective of the current investigation is to find out temperature distribution regimes in a horizontal pipe when condensation process is happened.  The research was conducted at Pusat Studi Ilmu Teknik Universitas Gadjah Mada. The experiment apparatus consists of an inner annulus pipe made from copper (din = 17.2 mm, do = 19 mm) with the length of 1.8 m. The outer annulus pipe is a galvanized iron pipe (din = 108.3 mm, do = 114.3 mm) with the length of 1.6 m. Thermocouples type K 36 TT OMEGA with chromel (+) and alumel (-) materials were used as temperature sensors, to detect the spread of temperature in radial or axial direction along the pipe. The measurement ranged from -50 to 260 oC, with an accuracy of 0.01 °C. A data logger of RX 40 serial (OMRON, 20 Channels) was used to read and record temperature data with the sampling rate of 5 Hz. In the experiment, the water (H2O)was heated using a boiler to generate steam which was then flowed and condensed inside the annulus pipe to form a steam-condensate two-phase flow in horizontal pipe. On the other hand, the water was used as a coolant in the outer of annulus pipe. The results indicated that the temperature distribution regimes are influenced by axial posisition.The farther distances from the inlet the lower the temperatures being recorded which indicate the increase of film condensate thickness. Such phenomena can affect slugging in the location.
Identifikasi Pola Aliran Dua Fasa Uap-Kondensat Berdasarkan Pengukuran Beda Tekanan pada Pipa Horisontal Sukamta, Sukamta; Indarto, Indarto; Purnomo, Purnomo; Rohmat, Tri Agung
Jurnal Semesta Teknika Vol 13, No 1 (2010): MEI 2010
Publisher : Jurnal Semesta Teknika

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Abstract

An experiment of two-phase flow patterns of steam-condensate based on differential pressure measurement in horizontal tube was conducted by varying the flow rate of the steam. The experiment utilised annulus pipe with inner section test pipe was made from copper and outer section was made from Galvanized Iron Pipe (GIP) wrapped with a 10-mm-thick insulation. The pipe was 1.6 meter length, and 4 inch outer diameter and 17 mm inner diameter. The two-phase flow regime was investigated based on pressure gradien between its inlet and outlet. In order to support the result, visualition was conducted using a ¾ inch diameter and 1.3 m length of transparent pipe connected with the test pipe section. Five variations of steam flow rate ranging from 0.00211361 m3/s to 0.007078511 m3/s were selected. The results show that for lowest steam flow rate, stratified flow pattern was identified while for the ot her variations, stratified, wavy, plug and slug flow pattern were observed. Wavy flow pattern occured on transition of stratified to slug or plug. Annular flow pattern was not observed in this experiment. Generally speaking, an increase in steam flow rate resulted in a more significant pressure gradient signals.
Simulasi CFD Aliran Stratified Air-Udara pada Pipa Horisontal Sukamta, Sukamta; Thoharudin, Thoharudin; Nugroho, Dedy Melianto
Semesta Teknika Vol 21, No 2 (2018): NOVEMBER 2018
Publisher : Semesta Teknika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.212227

Abstract

Two-phase flow can be found in industries, such as petroleum, electricity generation. In geothermal power plants, two-phase flow occurs from a mixture of water and steam which should be avoided in the piping system because it can cause equipment damage in the operating system. Therefore, an operator and engineer need a knowledge of flow patterns, phenomena and characteristics of the two-phase flow. One of the methods to predict the flow pattern is ud\sing the Computational Fluid Dynamic (CFD). This CFD simulation was modeled using Ansys Fluent 15.0 software to determine the changes of Stratified flow characteristics. The model used is Volume of Fluid (VOF). The fluid type is water and air. The variation of superficial water velocity JL of 0.025 m/s - 0.1 m/s while the superficial air velocity (JG) of 0.05 m/s - 1 m/s. The pipe used is an acrylic of 19 mm diameter and length of 1000 mm. The simulation results show that: (1). Stratified flow occurred for the low velocity of the liquid and gas phases. It was shown by the water and air are clearly separated. (2). Flow patterns are not stable, but it can change depending on the superficial velocity of gas and water. (3). The larger of JG causes the wave height because of Bernoulli’s effect so that it will make the stratified wavy or ripple flow pattern. (4). The frequency of stratified-wavy and ripple waves will tend to decrease when the JL increases, while the effect of JG is insignificant. Furthermore, it can be concluded that the speed of gas must be regulated so as not too large to the speed of water.
Korelasi Signifikan antara Kecepatan Superfisial dan Viskositas Cairan Menggunakan Pola Aliran Dua Fase pada Pipa Mini dengan Kemiringan 30 Derajat Sukamta, Sukamta; Sudarja, Sudarja
TURBO [Tulisan Riset Berbasis Online] Vol 8, No 1 (2019): Juni 2019
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.81 KB) | DOI: 10.24127/trb.v8i1.917

Abstract

This paper present a novel result of significant correlation between superficial velocity and viscosity on two-phase flow pattern in mini channel with slope of 30o against horizontal.             This research used glass mini pipe 1.6 mm diameter and 130 mm length with a slope of 30 ° to the horizontal position. The working fluid used is air - water with glycerin of 40%, 50%, 60%, 70% concentration. Liquid superficial velocity JL = 0.033 - 4.935 m / s and gas superficial velocity JG = 0.025 - 66.3 m / s. High-speed Camera was used to visualize the flow pattern.Summing up the result, it can be concluded that gas/water superficial velocity and viscosity of liquid effected significantly to form a flow patterns. In this paper, flow pattern of plug, bubbly, slug annular, annular, and churn were successfully found. Flow pattern maps showed that the distribution of different flow patterns due to the increased viscosity. Comparing with previous studies showed that there is a good agreement result.Keywords: high-speed, superficial velocity, viscosity, flow pattern.
Peningkatan Kemandirian Desa Melalui Pembangunan Instalasi Perpipaan Air Bersih dari Sumber Mata Air ke Rumah Penduduk Sukamta, Sukamta; Sudarja, Sudarja; Nurrahman, Budi; Kamiel, Berli Paripurna; Sudarisman, Sudarisman
Berdikari: Jurnal Inovasi dan Penerapan Ipteks Vol 7, No 1 (2019): February
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/bdr.7152

Abstract

Community empowerment program to make a village independent is very important. Village independence could be seen from various aspects, and one of which is the aspect of independence in the provision of clean water. Clean water supply activities in Balong Hamlet, Donoharjo Village, Ngaglik Sub- District, Sleman Regency are community empowerment activities in order to make Balong Hamlet independent on the aspect of the ability to provide clean water. This activity began with a survey and data collection of local residents’ water needs, followed by calculation of clean water requirements, design of clean water supply and distribution systems, implementation of piping installation, commissioning tests, economic analysis, and its contribution in making the village independent of clean water. This activity produces a piping system for clean water from the spring to the houses of Balong hamlets with a population of approximately 203 households. On average, each household needs 600 liters/day so it requires 121.8 m3 /day or 3654 m3 /month. The price of standard clean water for the Drinking Water Company (PAM) is Rp1,960.00/m3 , so the hamlet has saved Rp7,161,840.00/month or Rp85,942,080.00/year. Thus, this activity has made Balong Hamlet contribute significantly to the independence of Donoharjo Village.
AL-‘ALĀQAH BAYN AL-NUTQ WA AL-HURŪF FĪ AL-MASĀHIF AL-MABNIYYAH ‘ALĀ AL-RASM AL-‘UŚMĀNĪ: Dirāsah ‘An Al-HKam Warā’a Ikhtilāf Rasm Ba’d Al-Kalimāt Al-Qur’āniyyah ‘Alā Al-Rasm Al-‘Imlā’ī Sukamta, Sukamta
Indonesian Journal of Islamic Literature and Muslim Society Vol 3, No 2 (2018)
Publisher : IAIN Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (401.143 KB) | DOI: 10.22515/islimus.v3i2.1540

Abstract

The origin of Arabic letters is to write them down as spoken, without adding or subtracting, and without exchanging or changing, thus called standard letters. However, there are a number of words in the Quran that have deviated from this rule written in Ottoman letters. This article discusses the Qur’anic words written by maintaining their authenticity, and the wisdom behind the differences in writing the Quranic words. Using a historical analysis of Qur’anic writing based on seven dialects, it’s concluded that the writing of the Qur’an based on Ottoman letters is intended to maintain the authenticity of the words it uses because it was written as reported by the Prophet. The spelling rules of Ottoman letters lead the Qur’anic words to be read in different ways, which caused in three reasons, namely: there is one word has two readings but is written in one letter; there is one word with two writings that can be written in two letters, and there is one word that has a lot of reading and is written based on this reading. It shows the miracle of Quranic numbers written in Ottoman letters.
Optimasi Distribusi Lubang Pada Balok Baja Kastela Partono, Windu; Sukamta, Sukamta; Hardiyati, Siti; Budi, Listiyono
TEKNIK Vol 39, No 1 (2018): (July 2018)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1156.574 KB) | DOI: 10.14710/teknik.v39i1.12234

Abstract

Balok baja kastela adalah profil baja yang dikembangkan dari profil I yang dipotong bagian badan dan disambung lagi sedemikian rupa sehingga membentuk lubang pada bagian badan.  Bentuk lubang profil balok baja kastela pada umumnya adalah persegi enam (heksagonal). Pembuatan balok baja kastela perlu memperhatikan jarak antar lubang agar balok mempunyai kemampuan menahan beban tertinggi. Tulisan ini menyajikan hasil penelitian untuk menentukan jarak antar lubang yang optimum pada balok baja kastela dengan mempertimbangkan distribusi tegangan, deformasi, dan kelelehan pada balok tersebut. Penelitian diawali dengan perhitungan menggunakan metode Elemen Elemen Hingga (Finite Element Method /FEM) kemudian dilanjut dengan pengujian di laboratorium. FEM dilakukan untuk menentukan ukuran dan jarak antar lubang optimum pada balok kastela. Variasi sudut bukaan lubang dilakukan antara 45o sampai 70o. Hasil analisis FEM kemudian diujikan di laboratorium dengan ukuran dan jarak antar lubang optimum untuk mengevaluasi perbedaan hasilnya. Hasil penelitian menunjukkan lubang profil dengan kemiringan antara 45o sampai 70o sebaiknya dibuat dengan jarak antar lubang antara 0.1 sampai 0.25 dari tinggi profil balok kastela dengan distribusi lubang terbaik adalah antara 5 sampai 7 lubang per meter.
Dampak Kemiringan Dinding Silo Terhadap Distribusi Tegangan Dinding pada Corrugated Steel Silo Berkapasitas 4650 Ton Widyanto, Susilo Adi; Sukamta, Sukamta; Yurianto, Yurianto; Suprihanto, Agus
ROTASI Vol 20, No 2 (2018): VOLUME 20, NOMOR 2, APRIL 2018
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (721.42 KB) | DOI: 10.14710/rotasi.20.2.89-94

Abstract

Konstruksi silo dirancang untuk menyimpan butiran. Idealnya sumbu vertikal silo maupun dindingnya tegak lurus terhadap bidang dasarnya sehingga beban dinding hanya berupa gaya radial akibat ketinggian kolomnya.  Miringnya konstruksi silo menyebabkan terjadinya beban gabungan pada dinding pada arah kemiringannya. Paper ini membahas pengaruh kemiringan konstruksi silo pada gaya yang bekerja pada dinding. Silo yang diobservasi dengan kapasitas penyimpanan sebesar 4650 ton, dengan diameter 19 m dengan ketinggian 20 m. Dari hasil pemodelan FEM, distribusi tegangan pada dinding yang berbeda ketebalannya relatif lebih besar dibandingkan tegangan yang terjadi pada dinding ganda pada bagian dibawahnya. Tegangan maksimum terjadi pada daerah sambungan baut antara dinding dan stiffener. Pada kemiringan 10o tegangan maksimum dinding mencapai sekitar 45 kg/mm2 baik pada dinding ganda maupun di lokasi dinding yang berbeda ketebalannya.
Studi Eksperimental Kekuatan dan Perilaku Sambungan Kolom pada Struktur DfD (Design for Disassembly) Fitriani, Intan; Sukamta, Sukamta; Nurhuda, Ilham
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 21, Nomor 2, DESEMBER 2015
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (738.624 KB) | DOI: 10.14710/mkts.v21i2.11237

Abstract

DfD building system is a new approach in construction. Using DfD building system can reduce construction waste and reuse building components. This research examines the strength and behaviour of DfD column connections. Two types column connections were studied.The first connection employed H shaped steel elements bolted to the column while the second connection was bolt and plate connection. The behavior of columns with connections was compared to that of without connection. This study was carried out to investigate the strength, crack patterns, and failure mechanisms of precast concrete with dry joint on DfD column structure. All specimens were subject to normal force applied with an eccentricity of 67 mm. The test results indicate that both columns with connections were able to withstand design loads. This study also confirmed that the shear strength calculation of corbel based on SNI 03-2847-2002 section 13.9 was conservative to use as the value was still smaller than that obtained from this experiment.
Co-Authors Adi Putra, Kukuh Cahya Aditya Sage Pamungkas Agus Jamal Agus Suprihanto Agus Winarno, Agus Agustina, Nurhaliza Aliputa, Henu Satya Ami tri Fatrin Anderika Pradhita Andru Fajar Febrianto Andryan Mistavhirul P Angga Alfiannur Alfiannur Ari Dwiearto, Hasan Asy Arif Hidayat As’ari, Muhammad Agung Asshidiqie, Muhammad Rony Atikasari, Tiara Cahya Ay Lie Han Ay Lie, Han Bagus Acung Bilahi Baharudin, Irfan Bobby Rio Indriyantho Budi Rohmad Wijayanto Budiyantoro, Cahyo Caroko, Novi Darwin Hartono Dedet Hermawan Setiabudi, Dedet Hermawan Dianugrah, Rizki Dimas Prasetyo Nugroho Doni Apriadi Putera Dwi Aries Himawanto Elfrida Gresih Lumbantobing Erista, Dicky Fajar Wahyu Putranto Ferry Hermawan Fitri Wahyuni Galih Widyarini Gunawan Budiyanto Han Ay Lie Han Ay Lie Harahap, Yudani Alamsyah Hardi Wibowo Hardi Wibowo Hari Nugroho Hazim, Muhammad Fadhlurrahman Himawan Indarto Holyness Nurdin Singadimedja Husda, Syamsul Muarif Ilham Abadi, Ilham Ilham Nurhuda Inabah, Redha Fatki Indarto Indarto Indrastono Dwi Atmanto Intan Fitriani Junaedi Utomo Kamiel, Berli Paripurna Kamila Shaomi Nazila Khrisnawan Arief Wicaksono Kresno Wikan Sadono Krisna Harimurty Kuni Saadati Lisatia Dian Pithaloka Listiyono Budi Liza Azizah M. Yudi Purnawan Maemunah Mashuri Amin D. Muhammad Razi Muzthohidun, Muhammad Nasmiarta, Zhafarina Malaha Nauval Rabbani Nicolaus Iyowau Nugroho, Dedy Melianto Nuroji Nuroji Nurrahman, Budi Parang Sabdono Parang Sabdono Parang Sabdono Patrick Matheus Permana, Agung Pratama, Sadewa Eka Purnomo Purnomo Purwanto Purwanto Purwanto Purwanto R Dian Chintami R.Risang Haryo C.D. Rini Marlina, Rini Rudi Yuniarto Adi Rudy Suryanto, Rudy S. Wisnu B. Sanggabuana Satria K Septesen Nababan Shomad, Muhammad Abdus Sidqi Muhammad Siti Hardiyati Sri Sangkawati Sachro Sri Tudjono Sri Tudjono Subandono, Bagus Sudarja Sudarja Sudarja, Sudarja Suharyanto Sulistya, Krisna Suprapto Suprapto Suryanto, Arwan Susilo Adi Widyanto Syaiful Anshari Thoharudin, Thoharudin Tri Agung Rohmat Tri Agung Rokhmat, Tri Agung Triana Setianingrum Tunggal Bagas Yuliawan Utama, Nafi Ananda Utomo, Jati Wicaksono, Dwi Aji Widyasmoro, Widyasmoro Windu Partono Yudo Prasetyo Yulfyandika Manggala Putra Yulita Arni Priastiwi Yurianto Yurianto