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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 393 Documents

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Instrumen Pengukuran Kinerja Inovasi Perusahaan Kontraktor di Indonesia Julison, Bernathius
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014
Publisher : Department of Civil Engineering, Diponegoro University

Within the framework of the company's innovation theory, the purpose of this research is to develop an instrument to measure the performance of innovation activities of construction companies in Indonesia. The performance of innovation activities of construction companies is measured based on its innovation index and its sustainable competitive advantage index, and stratified by qualification of construction companies (small, medium, and large). The company's innovation index is calculated based on the analysis of inputs, processes, outputs, outcomes and impact of the innovation. Company's sustainable competitive advantage index is calculated based on (1) the company's ability to maintain and improve its competitive advantage indicators in the last five years, and (2) the degree of scarcity, imitate difficulty, and replaced difficulty or unreplaceability of the output of innovation activities. Indicator of a company's competitive advantage that calculated in this study is the profitability, productivity and market share of the company

Perhitungan SCF Untuk Analisa Fatigue pada Sambungan Struktur Anjungan Lepas Pantai Tawekal, Ricky L.
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 2, Edisi XXXII, JUNI 2005
Publisher : Department of Civil Engineering, Diponegoro University

Fatigue is one of the failure modes on offshore structures that need to be monitored carefully. Fatigue analysis is usually carried out to predict the service life of structure due to fatigue on its joints. Fatigue damage is also depent on Stress Concentration Factor (SCF). SCF is the ratio of hotspot stress at joint to nominal stress on member. Hotspot stress is extreme stress occur at intersection of the joint. In this paper, the calculation of SCF at joint T is carried out by using Finite Element Method that available in ProEngineer Software.Â The resulted SCF based on Finite Element Method will be compared to calculated SCF based on empirical formula. In addition, SCF on joint T will also be compared to SCF on joint with tubular stiffener.Keywords: fatigue, failure mode, offshore structures, stress concentration factorPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3910[How to cite: Tawekal, R.L., 2005, Perhitungan SCF Untuk Analisa Fatigue pada Sambungan Struktur Anjungan Lepas Pantai, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 2, pp. 63-74]

Analisis Perbandingan Kontrak Tradisional dan Kontrak Berbasis Kinerja (KBK) Berdasarkan Risiko Persepsi Kontraktor dengan Metode Analytical Hierarchy Process (AHP) Fauziyah, Shifa; Wibowo, M. Agung; Suliantoro, Hery
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 1, JULI 2016
Publisher : Department of Civil Engineering, Diponegoro University

Two types of contracts that are used in the road project is a traditional contract (Unit Price) and performance based contract (Lump Sum). Both types of contracts have their own risks. Therefore, it is necessary to measure which type of contracts is more risky between traditional contract and performance-based contract from the perspective of the contractor using Analytical Hierarchy Process. Analytical Hierarchy Process (AHP) is a method used to find a weight where the intensity of the risks using traditional contract and performance-based contract can be measured and analyzed. This research took sample for project with a traditional contract is Kendal â€“ Semarang Road Project. While the samples for the project with a performance based contract is Semarang â€“ Bawen Road Project. The results of the calculation by the alternative assessment, are the higher rank is performance based contract which is 0.56 (56%), while traditional contract is the second with the total score 0.44 (44%). The mean is performance based contract more risky than traditional contract from the perspective of the contractor.

Prospek Kontribusi DAS Cikapundung Memenuhi Laju Permintaan Sumber Air Baku Metropolitan Bandung Sabar, Arwin
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 2, Edisi XXXV, JUNI 2006
Publisher : Department of Civil Engineering, Diponegoro University

Among major problems occurring in urban development, the most critical issue is the limitation of water resources as raw water for drinking water supply, especially its existing quantity. The groundwater contribution to fulfil raw water requirements in metropolitan bandung is realatively decreasing, The Cikapundung River, is an alternative source for raw water, is being used as primary raw water for several decades in Bandung. Using statistical method, research has shown that the distribution of minimum flow of the three flow stations could not meet the total demand in dry months. Station Cigulung-Maribaya, Station Cikapundung-Maribaya, and Cikapundung-Gandok usually experienced an extreme dry condition in September. The minimum flows for those three stations for a 20 years repeating period are 0.226 m3/sec, 0.893 m3/sec and 0.336 m3/sec, respectively. The dam that has been constructed up stream of The Cikapundung River is expected to increase the capacity of Station Maribaya up to 0.608 m3/sec, which could then impact the total raw water supply for Pakar Water Treatment Plant. Concurrently, the construction of dam at Station Gandok is targeted to increase the raw water supply up to 0.604 m3/sec. Those means giving solution for migrating groundwater to surface water utilization.Keywords: daily minimum flow, monthly minimum flow, reservoirPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3944[How to cite: Sabar, A., 2006, ProspekÂ KontribusiÂ DAS CikapundungÂ Memenuhi LajuÂ Permintaan SumberÂ Air BakuÂ Metropolitan Bandung, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 2, pp. 169-178]

The Mechanics Properties of Self-Compacting Concrete Using Red-Tile Waste as Substitution of Fine Aggregates Octobenita, Crezensia Alfiora Deadema Dias; Lisantono, Ade
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 23, Nomor 2, DESEMBER 2017
Publisher : Department of Civil Engineering, Diponegoro University

This paper presents the experimental program about the mechanics properties of Self-Compacting Concrete (SCC) using red-tile waste as substitution of fine aggregates. The proportion of red-tile waste substitution was 10 %; 20 %; 30; 40 %; and 50 % of fine aggregates by weight. Viscocrete-10 was used to maintain the workability and flowability of SCC. 72 cylinder specimens with the size of (150Ã—300) mm and 18 beam specimens with the size of (100Ã—100Ã—500) mm were cast and tested in this study. The mechanics properties of SCC that were studied in this research were compressive strength, modulus of elasticity, and modulus of rupture. The compressive strength of SCC was tested at age 7; 14; and 28 days. While the modulus of elasticity and modulus of rupture of SCC were tested only at age 28 days. The result shows that the maximum compressive strength of SCC was obtained using red-tile waste with the proportion of 50 % as substitution of fine aggregates. The compressive strength of SCC using red-tile with the proportion of 50 % at age 7; 14; and 28 days were 64.746 MPa;, 65.564 MPa; and 71.940 MPa, respectively. While the maximum modulus of elasticity and modulus of rupture of SCC were obtained using red-tile with the proportion 50 % at age 28 days, and the modulus elasticity and modulus of rupture were 25863.192 MPa and 7.076 MPa, respectively.

Ketersediaan Debit Air untuk Irigasi Pedesaan di Sungai Cipeles Jawa Barat Supadi, Supadi
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 15, Nomor 3,OKTOBER 2007
Publisher : Department of Civil Engineering, Diponegoro University

Indonesianâ€™s gorvernment has make regulation No.7, 2004, about water resources engineering. It also content in Principle Ordinance of Indonesia 1945 in chapter XIV, and in section 33 which says that the land, the water and the rich of Indonesianâ€™s nature is having by the government and used to as much as the civilian prosperity.Some initiatives has made by the government to increase the number of food production. They are consist of two ways, intensification and extensification methods which are suported by technical, semi technical, and simple technical irrigation system. Because of the Growth of Indonesianâ€™s population, the demand of rice as main food is increase.Water demand research for village irrigation is needed to increase the production of rice. To estimate the demand of water, it is a must to have investigation first. The investigation is used to investigate some datas, they are the dimension of river chanall, the speed of water and the discharge of river. There are two method to looking for them. First method is using the floating object and then the second one is using Current Meter. Using Floating Object is suitable to looking for the datas in a village irrigation system, but it is a must to use another equipment as equal equipment. Keywords : Water Demand, VillageÂ Irrigation

Turbulence Characteristic of Flow Near Laboratory Experiment Groin Fields Wardhana, Pradipta Nandi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 2, DESEMBER 2018
Publisher : Department of Civil Engineering, Diponegoro University

Groin is hydraulic structure utilized to protect riverbank from erosion. Groin will shift away flow. Area just downstream of groin structure will be occupied by low velocity flow hence there will be sediment deposition. Turbulence mechanism between primary flow region and groin field having important role in sediment exchange needs to be investigated. Instantaneous flow measurement was conducted in order to investigate turbulence relation between series groin under various groin spacing. Laboratory experiment employed turbulence flow having Reynolds number range between 31,935-32,500 and Froude number range between 0.051-0.053. A MicroADV 16-MHz was used to measure 3D instantaneous velocity. The experiment findings expressed that Reynolds stress involving vertical velocity Â and Â Â did not show any specific distributions except at the lowest measurement elevation, while Reynolds stress Â Â showed specific distributions. Turbulence value difference between groin field and primary flow region at upstream of the groin field was significant. As the area was getting downstream, area containing high turbulence was wider. This work indicated that bed shear stress value Â tended to grow at downstream area of groin field. High difference bed shear stress value Â between primary flow region and groin field seized second groin field and third groin field.

The Influence of Environmental Factors and Curing Period toward the Performance and durability of Asphalt Mixtures Setiadji, Bagus Hario
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 16, Nomor 2, JUNI 2008
Publisher : Department of Civil Engineering, Diponegoro University

Tujuan dari penelitian ini adalah untuk memberikan informasi terkini mengenai pengaruh periode curing (waktu jeda antara saat sampel selesai dibuat dengan waktu pengujian) dan faktor lingkungan (suhu dan kelembaban) terhadap kinerja dan durabilitas dari campuran beraspal. Dalam studi ini, untuk mengukur kinerja dari campuran beraspal digunakan beberapa parameter Marshall, seperti Marshall stability, flow, Marshall Quotient (MQ), Void Filled with Asphalt (VFA), Void in the Mix (VIM) dan Void in Mineral Aggregate (VMA). Sedangkan untuk mengukur durabilitas campuran beraspal digunakan parameter Marshall Retained Stability. Campuran beraspal dibuat dengan mengacu pada 2 (dua) standard, yaitu yang pertama, SKBI â€“ 2.4.26.1987 UDC : 625.75 (02), dimana campuran beraspal dipadatkan sebanyak 150 kali (75 kali per muka), untuk mendapatkan apa yang dinamakan campuran beton aspal (asphalt concrete/AC). Standard kedua yaitu standard baru Bina Marga (2001), dimana campuran beraspal dipadatkan sebanyak 2 (dua) fase, yaitu fase 1 dengan jumlah pemadatan sebanyak 150 kali dan fase 2 dengan jumlah pemadatan 400 kali. Hasil dari proses pemadatan dua fase ini adalah campuran beraspal hot mixture asphalt â€“ percentage refusal density (HMA â€“ PRD). Sesudah proses pemadatan, campuran beraspal kemudian disimulasikan dengan beberapa periode curing dan dua kondisi curing yang berbeda, yaitu curing di dalam dan di luar ruangan, dengan beberapa tingkatan suhu dan kelembaban. Hasil yang diperoleh dari studi ini mengindikasikan bahwa periode curing mempunyai pengaruh yang dominan terhadap kekuatan campuran. Sebenarnya faktor suhu dan kelembaban juga mempunyai kontribusi terhadap bertambah atau berkurangnya kekuatan campuran, namun hal ini tergantung dari lokasi dimana proses curing dilakukan dan tergantung juga pada pengaruh cuaca, terutama pada saat proses curing dilakukan di luar ruangan. Pengujian durabilitas campuran beraspal memberikan hasil bahwa semakin panjang periode curing dan semakin tinggi suhu di lokasi curing, maka campuran beraspal akan semakin awet (durable). Hasil lain yang diperoleh dari studi ini adalah campuran beraspal HMA-PRD menunjukan kinerja dan durabilitas yang lebih superior dibandingkan dengan kinerja dan durabilitas campuran beton aspal (AC). Â ABSTRACT Â The aim of this study was to provide up-to-date information about the influence of curing period and environmental factors, that are temperature and humidity, towards the performance and durability of asphalt mixtures. To measure the performance of theÂ mixture, several Marshall characteristics, such as Marshall stability, flow, Marshall Quotient (MQ), Void Filled with Asphalt (VFA), Void in the Mix (VIM) and Void in Mineral Aggregate (VMA) are used in this study, whereas Marshall Retained Stability is used to measure the durability characteristic of the mixtures. The mixtures are developed according to two standard specifications, that is, SKBI â€“ 2.4.26.1987 UDC : 625.75 (02), the old specification, on which the mixtures, AC mixture, is compacted as many as 150 blows (75 times per face). Another specification used in this study is the new specification for hot mixture proposed by Department of Public Work (2001), on which asphalt mixture, named HMA-PRD, is compacted in two phases, that is, phase 1 and 2 with total 150 blows and 400 blows, respectively. After the compaction, the mixture then is cured in different curing period and in several conditions, that is, indoor and outdoor conditions with different levels of temperature and humidity.Â The result indicates that curing period has dominant effect on the mixtures stiffness. Actually, temperature and humidity factors also contribute to the results; however, it depends on the location of the mixtures cured and also the climates. The durability test results that the longer the curing period and the higher the temperature are, the more durable the mixtures will be. Another result of this study is the new-specification mixture, HMA-PRD, is more superior than the old-specification mixture in stiffness and durability parameters. Keywords: asphalt mixtures, curing period, environmental factors, performance, durabilityPermalink: http://ejournal.undip.ac.id/index.php/mkts/article/view/3687[How to cite: Setiadji, B.H. (2008), The Influence of Environmental Factors and Curing Period toward the Performance and durability of Asphalt Mixtures, Jurnal Media Komunikasi Teknik Sipil, Tahun 16, Nomor 2, pp. 105-116]

Variasi Koefisien Kekasaran Manning (n) pada Flume Akrilic pada Variasi Kemiringan Saluran dan Debit Aliran Putro, Haryono; Hadihardaja, Joetata
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 19, Nomor 2, DESEMBER 2013
Publisher : Department of Civil Engineering, Diponegoro University

Based on the book of open channels hydraulics by Ven T. Chow (1988) mentioned that the big problems in application Manning equation is determine of roughness coefficien n, because there is no certain way to choose value of n. At the current knowledge, choosing the actual value of n is estimated flow resistance on certain channels, that really can not be taken into specific value. The purpose of this study is experimentation to describe the differences Manning roughness coefficient (n) at the same material of channel by a different channel slope and discharge. The method used is by modeling the physical channel with a width of 15cm and depth of 20cm with akrilic material thickness of 0.5 cm. Flow in a channel by channel basis slope variation 0.0087; 0.0175; 0.0349 and 0.0524. With the discharge varies from 1 to 4.5 liters / sec. The results of the analysis showed there vairiasi n values between 0.006 to 0.032.

Simulating Network Impacts for Introducing Two-Way Traffic System and Pedestrian Area at The City Centre: A Case Of Yogyakarta City, Indonesia Parikesit, Danang
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 13, Nomor 1, Edisi XXXI, PEBRUARI 2005
Publisher : Department of Civil Engineering, Diponegoro University

Dua strategi pembangunan perkotaan penting yang diadopsi Kota Yogyakarta adalah (1) revitalisasi pusat kota melalui penataan manajemen lalulintas dan prioritas bagi pejalan kaki, dan (2) dekonsentrasi pembangunan kota dan pengembangan pusat kota baru. Selain mendorong investasi swasta, strategi ini akan memperbaiki kualitas udara di pusat kota dan pemanfaatan kapasitas jaringan jalan. Jumlah pejalan kaki, kendaraan tidak bermotor dan angkutan umum akan mengurangi emisi dan konsumsi energi. Penelitian dilakukan pada proses evaluasi rencana perubahan jalur satu arah menjadi dua arah dan uji coba pedestrianisasi dengan piranti lunak EMME/2. Pengenalan lalulintas dua arah di jalan Abubakar Ali â€“ Pasar Kembang serta segmen pejalan kaki di pusat kota akan mengurangi lalulintas menerus dan memindah lalulintas ke sistem loop yang dikenalkan sekitar pusat kota. Skenario tersebut mengurangi 20% kendaraan-km dan 13% kendaraan-jam. Meskipun kecepatan kendaraan berkurang dari 25,5 km/jam menjadi 23,5 km/jam, skema ini tetap menunjukkan penghematan BBM tahunan sebesar 251.892 liter Â atau setara Rp 453.266.302,00 dengan tingkat harga BBM saat ini. Skema ini akan mengurangi polusi udara di wilayah penelitian sebesar 13,04% - 15,69% serta peningkatan kondisi transportasi tidak bermotor. Penelitian lebih lanjut akan diarahkan untuk menerka dampak dari jaringan transportasi yang lebih luas serta mengembangkan kerangka kerja untuk penghambat pengemudi motor serta manajemen parker yang sesuai. Kata kunci: manajemen lalulintas, pedestrianisasi, EMME/2, YogyakartaPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3901[How to cite: Parikesit, D., 2005, Simulating Network Impacts for Introducing Two-Way Traffic System and Pedestrian Area at The City Centre: A Case Of Yogyakarta City, Indonesia, Jurnal Media Komunikasi Teknik Sipil, Volume 13, Nomor 1, pp. 96-107]

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