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MEDIA KOMUNIKASI TEKNIK SIPIL

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Published by Universitas Diponegoro

ISSN : 08541809 EISSN : 25496778 DOI : -

Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

Media Komunikasi Teknik Sipil (ISSN 0854-1809) published twice in a year, in July and December. The article can be product of researches, scientific thoughts or case study, in civil engineering and isnâ€™t formed by politics, commercialism, and subjectivity unsure. This scientific journal contains articles of thought and research results in Civil Engineering that have never been published in scientific journals or other media.

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Articles 471 Documents

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Penerapan Optimasi Parameter pada Metode Exponential Smoothing untuk Perkiraan Debit Santosa, Budi; Suharyanto, Suharyanto; Legono, Djoko
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 18, Nomor 1, PEBRUARI 2010
Publisher : Department of Civil Engineering, Diponegoro University

Exponetial smoothing is a technique that is very easy to apply and very effective as forecasting tool. However it requires the estimation of a parameter in order to get good acceptable result. The paper present the optimization is performed by using LINGO 11. The Resulted parameter gives predicted values closestto the observed data, and produces very good prediction as indicated in the MAE and MSE values better than other methods. Keywords : Discharge prediction, Parameter optimization, Exponential smoothing Â Abstrak Â Exponential smoothing adalah suatu metode yang sangat mudah untuk diterapkan dan sangat efektif dalam peramalan. Akan tetapi, penerapan metode Exponential smoothing ini memerlukan perkiraan parameter smoothing yang tepat. Dalam paper ini disajikan teknik optimasi parameter untuk memperkirakan parameter smoothing yang menghasilkan error yang minimum. Dalam optimasi yang digunakan LINGO 11. Parameter yang dihasilkan memberikan hasil prediksi yang paling dekat dengan data observasi , serta memberikan hasil yang lebih baik sebagaimana ditunjukkan dengan nilai MAE dan MSE dibanding dengan metode lain. Kata-kata Kunci : Perkiraan debit, Optimasi parameter, Exponential smoothing

Pemodelan Perilaku Tegangan dan Regangan Beton pada Suhu Tinggi dengan Software LUSAS Suryanita, Reni; Rahmadhan, Wahyu; Kamaldi, Alfian
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 25, Nomor 1, JULI 2019
Publisher : Department of Civil Engineering, Diponegoro University

The concrete structure exposed to high temperatures can affect the strength of the structure. Limitations in the experimental method can be solved by mathematical modeling. This study aims to identify the stress and strain behavior that occurs at high-temperatures. The model is a cylindrical concrete with a diameter of 150 mm and a height of 300 mm. The concrete strength design is 25 MPa. The temperatures of the model are 100 Â°C, 200 Â°C, 300 Â°C, 400 Â°C, 500 Â°C, 600 Â°C, and 700 Â°C. The model analysis using LUSAS v. 16 Software to observe the properties of the concrete material due to exposure to high temperatures. The results of the study get the higher the temperature received by concrete, the strength of the concrete decreases. Concrete that burned to a temperature of 300 Â°C still had 82% available power, and at a temperature of 700 Â°C, the remaining concrete strength was 30%. The strain increases to 423% from normal conditions at a temperature of 700 Â° C. Therefore, the results of the study can be used as a reference for structural engineers to know the behavior of the concrete that exposure to high temperatures.

Perhitungan Faktor Beban Gaya Lingkungan untuk Analisa Struktur Anjungan Lepas Pantai dengan Metoda LRFD Tawekal, Ricky L
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 12, Nomor 3, Edisi XXX, OKTOBER 2004
Publisher : Department of Civil Engineering, Diponegoro University

Up to this moment, structural design of offshore platforms in Indonesia is carried out by using API RP2A standard which is originally used for Gulf of Mexico environment. This will result in an over designed structure since the environment in Indonesia is less severe compare to the environment in Gulf of Mexico. Therefore, the environmental load factors that specified in API RP2A LRFD should be reviewed and determined based on local environmental condition. In this paper, a model of 4-leg jacket structure is used to determine environmental load factor based on environmental condition at South East Sumatera Area. Structural analysis is carried out by using SACS (Structural Analysis Computer System) software. Keywords: load and resistance factor design, offshore structures, load factorPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3886[How to cite: Tawekal, R.L., 2004, Perhitungan Faktor Beban Gaya Lingkungan untuk Analisa Struktur Anjungan Lepas Pantai dengan Metoda LRFD, Jurnal Media Komunikasi Teknik Sipil, Volume 12, Nomor 3, pp. 12-26]

Optimasi Biaya dan Waktu dalam Penyusunan Jadwal Pelaksanaan Proyek (Studi Kasus Proyek Pembangunan Gedung Pusat Kegiatan Mahasiswa Universitas Diponegoro Semarang) Amat Pawiro, Dadiyono; Suharyanto, Suharyanto; Atmojo, Pranoto Samto
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 2, DESEMBER 2014
Publisher : Department of Civil Engineering, Diponegoro University

Execution of conctruction project executed to pass selected project management system from planning phase until operation phase. Unfavorable scheduling system can cause the project to be inefficient. Execution of a construction project often needs to accelerate the duration of the project. Every effort to expedite the implementation of the project in general will result in increased project costs. This provides the necessary conditions so that the business dilemma that the project can be completed with optimum cost and time. The intention and purpose of this research is to accelerate the execution time by using the method of CPM overtime, so we get the optimal time and cost. This research method by forming a linear equation of the trajectory of the crisis and then analyzed by linier program LINDO. The results on the building construction projects the PKM Universitas Diponegoro obtained optimum time of 133 days with a total cost of Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Rp. 6,252,074,822,-

Meningkatkan Daya Dukung Landfill dengan Serbuk Limestone Andriyani, Utari Wessy; Solichin, Solichin
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 3, Edisi XXXIII, OKTOBER 2005
Publisher : Department of Civil Engineering, Diponegoro University

Laboratories testing to stabilization difficulty soil especially landfill was conducted. As stabilization material are used limestone, with various composition of landfill soil added limestone starting 8 % to 40 % from landfill soil weight. Based on the result testing data can be conclusion that the best composition is landfill soil + 24 % limestone. In this composition the value of ultimate bearing capacity is increase 493.388 % And allawable bearing capacity increasing up to 493.388 %. In this best composition the value of soil parameters: cohesion (Cuu) increase 493,8 %, liquid limitÂ (LL) decrease 12.52 %, OMC decrease 10.8 %, dry unit weight (gd) increase 14.27 %, specific gravity (GS) increase 4.8 % and compression index (Cc) decrease 15,7 %. So that limestone can be used such stabilizationÂ alternative material for landfill.Keywords : Limestone, stabilization, difficult soilPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3918[How to cite: Andriyani, U.W. dan Solichin, 2005, Meningkatkan Daya Dukung Landfill dengan SerbukÂ Limestone, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 3, pp. 13-18]

Studi Karakteristik Campuran Aspal Beton Lapis Aus (AC-WC) Menggunakan Aspal Penetrasi 60/70 dengan Penambahan Lateks Thanaya, I Nyoman Arya; Puranto, I Gusti Raka; Nugraha, I Nyoman Sapta
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Asphalt on pavement in long term may undergo hardening, so it needs addition of additive that can make it remain flexible. This experiment tried to produce asphalt concrete wearing course (AC-WC) using asphalt penetration 60/70 with the addition of latex, with aim to know the characteristic of AC-WC mix at the optimum of asphalt content with addition ofÂ latex in variation of 0%, 2%, 4%, 6%, 8%, and 10% of the total binder. Latex was initially mixed with the asphalt, then the aggregates were proportioned based on ideal grading. The samples were produced in hotmix process. The density of latex was found 0.977 with dry rubber content of 61.95%. The optimum of asphalt content that was 5.7%, where all Marshall characteristics were met. It was chosen the mix with 4% latex by total binder where all properties of asphalt binder were still met. It was obtained that the Stability valueÂ was 1439.26 kg (â‰¥ 800 kg), Flow 3.84 mm (2-4 mm), Marshall Quotient 379.66 kg / mm (â‰¥ 250 kg / mm), VIMÂ 4.437% (3-5%), VMA 15.280% (â‰¥ 15%), VFB 70.961 (â‰¥ 65%). The mixture that contains latex had better resistance to deformation under dynamic creep loading at 40 Â°C.

Kajian Model Angkutan Sedimen pada DAS Serayu Berdasarkan Model Matematik 1 Dimensi Kusuma, M. Syahril Badri; Salim, Hang Tuah; Gusman, Aditya Riadi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 3, Edisi XXXVI, OKTOBER 2006
Publisher : Department of Civil Engineering, Diponegoro University

This paper present comparisonÂ study of several mathematical model for sediment transport, e.g. Yang (1973), Ackers-White (1973), Madden (1963), Vanony-Duboys (1975), Schocklitsh-Toffaleti (1966), Meyer-Peter-Muller (1948) dan Colby (1964). The study was supported by 1 dimensional mathematical model named HEC6. Model Calibration and verification were done by using field data measurement that was taken at Mrica Reservoir in 1992-1993 and 2002-2003. Based on this study, it is found that the best assessment for the sedimentation process in the upstream of the reservoir is shown by Yang model (1973), meanwhile the best assessment for the sedimentation process in the downstream of the reservoir is shown by Colby model (1964).Keywords: sediment transport, one dimension mathematical model, Serayu riverPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3952[How to cite: Kusuma, M.S.B., Salim, H.T. dan Gusman, A.R., 2006, Kajian Model Angkutan Sedimen pada DAS Serayu Berdasarkan Model Matematik 1 Dimensi, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 3, pp. 260-276]

Faktor yang Mempengaruhi Keberhasilan Penerapan Teknologi Bidang Jalan dengan Kontrak Rancang Bangun Hendrawan, Hendra
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 1, JULI 2018
Publisher : Department of Civil Engineering, Diponegoro University

Research and development in the roads sector is one of the coaching tasks of roads authority. To disseminate the results of research or technology that has been developed required the transfer of technology which one of them through technology implementation project. In the Year 2015-2017 Institute of Road Engineering has carried out the technology transfer process through limited project of implementation technologyÂ by using Design and Build contract. In the implementation project there are some constraints or factors that affect the implementation performance so that the resulting output is not optimal. The purpose of the study is to identify the critical determinants of project success of technology implementation with Design and Build contract and to give weighting. The method used in the study is descriptive qualitative analysis using data collection tools in the form of interviews and questionnaires to further analyzed by Analytical Hierarchy Process method. The results of the study showed that the factors that affect the successful of implementation technology projects is qualification of providers. The sub aspect that is considered has big influence is the financial ability for the qualification aspect, and the basic knowledge to the technology developed for technical aspect.

Uji Kemampuan Bangunan Pengaman Mengurangi Longsoran pada Balas Rel akibat Banjir Atmojo, Pranoto Samto; Sachro, Sri Sangkawati; Budieny, Hary
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 1, JULI 2013
Publisher : Department of Civil Engineering, Diponegoro University

Ballast rail has a vital fuction to support the trainâ€™s load and its dynamic forces. This load is then distributed to the subgrade layer through pile of gravel under the ballast. Most of the design about the gravel layer (ballast) doesnâ€™t take into account the effect of flood overflow on the rail, which is very likely to occur during rainy season. The Flood flows above the rail will reduce the ballast stability and then eroded. Part or most of the gravel were flushed out, thus resulting the ballast to be weak and may collapse, which is vey dangerous to the train traffic. Its therefore requires to investigate stability of the ballast under flood flow above the rail condition and any measure or improvement required by Hydraulic Modeling. The research is conducted at Hydraulic Laboratory, Diponegoro University. The model prototype is refer a tract rail at Mangkang-Semarang KM.12, with scale of 1:5. Its shown that the ballastÂ without a safety structure will start to scour when water level h1 = 15 cm , meanwhile with the structures Type 1 and Type 1 + 1 its start scour h1 = 17 and 19 cm respectively. The safety structure is able to scouring decrease , ie at the variation of h1 = 19 cm , there are 68.50 cm without structure, and with structure Type 1 and Type 2 areÂ 29 andÂ 26 cm respectively. This research shown that it needs to installing safety structure (sill) to reduce the danger cause of flood flow over the rail, especially at the flood prone area. The Management of train traffic could adopt this result how to protect of ballast scour cause of flood.

Model Hubungan Kapasitas Rekatan Balok Beton Bertulang yang Diperkuat GFRP-S terhadap Lama Perendaman Air Laut Sultan, Mufti Amir; Djamluddin, Rudy
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 25, Nomor 1, JULI 2019
Publisher : Department of Civil Engineering, Diponegoro University

The construction of structures with reinforced concrete materials in coastal environments will face constraints in the form of chloride influences which can lead to a decrease in strength and even damage. One of the most popular reinforcement methods today is using a corrosion resistant Glass Fiber Reinforced Polymer (GFRP) material. This study was conducted to investigate the behavior of GFRP-S rectifying capacity in reinforced concrete beam reinforcement in 1, 3, 6, and 12 months. The test specimens consist of 10 reinforced beams with dimensions (15x20x330) cm that has been reinforced with GFRP-S in the bending area. Beams without immersion symbolized B0, immersion 1, 3, 6, and 12 months each given symbols B1, B3, B6 and B12. The test specimen is loaded statically until it fails. To record the data when testing is installed strain gauge and LVDT. From the result of the research, it can be seen that there is a decrease of GFRP-S rectification capacity in the test specimen after soaking in seawater. The value of the decrease in the capacity of the bonding can be predicted by using the equation

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