MEDIA KOMUNIKASI TEKNIK SIPIL
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 isn’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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<![CDATA[Instrumen Pengukuran Kinerja Inovasi Perusahaan Kontraktor di Indonesia ]]>
<![CDATA[Julison, Bernathius]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9243
<![CDATA[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]]>
<![CDATA[Studi Rasionalisasi Jaringan Hidrologi Pulau Seram Provinsi Maluku ]]>
<![CDATA[Mulya, Happy]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9248
<![CDATA[Information of water resources in the form of information on hydrological and hydro meteorological conditions, necessary to support the management of water resources in the basin (Law No.7/2004 SDA). This information is obtained from hydro-meteorological network that represents of these Basin. Rationalization aims to obtain efficient and effective hydrological network and can represent the hydrologic conditions of Seram Island Maluku Province both present and future. Therefore the selection of a method that only suggest the number, density or distribution of the post is not the final answer and directly elected, but the integration between the methods used by the method of Kagan, weight factor, and Stepwise with rules (standard, guidance, and manual) and considering spesific infrastructure needs existing and planned development in accordance with the pattern of river basin management. Proposed hydrology network for Seram Island is to maintain the existing number of hydrological station with the notes necessary of improvement efforts for hydrological management, such as to the amount of rainfall station are as many as 46 stations. Kagan analysis results for the basin with an area 4,873,382 km², has an error rate of 5% and 10% for the analysis, relatively small and good enough to be maintained.]]>
<![CDATA[Pengaruh Model Infiltrasi Sederhana Menggunakan Konsep Rain Garden terhadap Debit dan Kekeruhan Air Limpasan Akibat Hujan ]]>
<![CDATA[Barid, Burhan]]>;
<![CDATA[Lestari, Dwi]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9244
<![CDATA[Water is the most basic requirement that is necessary for a good life on land, sea or air. Water in the face of this earth are not directly derived from the rain. All living things need water to survive. Water management should be done as quickly as possible so that its availability is maintained. Along with the development of the times and increasing daily population in Indonesia, the demand for water continues to increase. Indonesia has a tropical climate with two seasons, the dry season and the rainy season. During the dry season of drought, while in the rainy season floods. One reason is the change in land use that result in water catchment areas disappear and be replaced by buildings some hydrological model was developed to determine the water balance, such as infiltration models. Infiltration models are used to determine how much of the surface runoff or inundation (ponding) which can be infiltrated. The purpose of this study is to analyze the model's ability to absorb water in a simple infiltration runoff, infiltration simple models to analyze the influence of the flow between, to analyze the efficiency of a simple infiltration models to infiltration, and a simple model to analyze the influence of water turbidity in a state of unsaturated and saturated water. The results showed that the soil with plants media can reduce runoff and improve water quality due to rain than vacant land. Discharge runoff on bare ground while unsaturated and saturated water of 0.136 liters/sec and 0.134 liters/sec, while on the ground with the current crop of media unsaturated and saturated water at 0.1330 liters/sec and 0.1300 liters/sec. The content of the suspension on a vacant lot when unsaturated and saturated water is 6.88; 4.20; 3.94 mg/l and 2.13; 1.66; 1.11 mg/l, while in the soil with the current crop of media was saturated and saturated water is 4.40; 4.22; 2.35 mg/l and 0.92; 0.83; 0.63 mg/l.]]>
<![CDATA[Perbedaan Komitmen dan Kinerja antara Manajer Proyek Konstruksi Besar dan Manajer Proyek Konstruksi Kecil dengan Pendekatan Analisis Diskriminan ]]>
<![CDATA[Sahadi, Sahadi]]>;
<![CDATA[Agung Wibowo, M.]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9249
<![CDATA[This study aims to analyze, first, the difference of commitment between big and small construction project managers, second, the difference of performance between big and small construction project managers. In particular, the commitment has eleven (11) discriminating indicator variables and the performance has nine (9) discriminating indicator variables. The results of study using the discriminant analysis approach indicate that from the eleven (11) indicator variables of commitment only two (2) indicator variables that discriminate big and small construction project managers, namely a. Y15= you are very concerned with the fate of this company, b. Y110= this company highly respects your values and goals, and from the 9 (nine) indicator variables of performance only one indicator variable that discriminates big and small construction project managers, namely Y26= the attitude towards work implementation]]>
<![CDATA[Pengaruh Substitusi Pozolan Alam (Tras) terhadap Semen pada Kuat Tarik Campuran CTRB ]]>
<![CDATA[Waani, Joice]]>;
<![CDATA[Prabandiyani, Sri]]>;
<![CDATA[H Setiadji, B]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9245
<![CDATA[The use of Cement Treated Recycling Base (CTRB) material in Indonesia, is a very well established practice in Indinesia. This mixture containing Reclaimed Asphalt Pavement (RAP) and Reclaimed Aggregate Materials (RAM) and stabilized with portland cement as pavement structural base layer. This technique has been applied in the field in some pavement major rehabilitationand reconstruction projects successfully. However, identical to other cementitious stabilized materials, this CTRB material is prone to cracks during service. For that reason, the use of cement as a stabilized material in CTRB has to be reviewed thoroughly before implementation in the field. The use of recyclable materials in pavement applications is not only environmentally friendly, but also can reduce the cost of materials in a particular project. In addition, a reduction in the use of cement in the CTRB material has a potential to reduce anticipated cracks that influence the physical characteristic of the mixtures. In this research project, the Indirect Tensile Strength (ITS) Test was conducted to review the influence of partial cement replacement with natural pozzolan (trass) to the mechanical properties of the CTRB to withstand tensile stress. A lower ITS value correlates to the shrinkage cracking tendency of the material. The results show that the increase in the percentage of cement replacement correlates well to the increase of the ITS values. Direct correlations exist for 15% and 30% cement replacement of the 4% to 6% CTRB cement content with 40% RAP-60% RAM and 60% RAP – 40% RAM combinations.]]>
<![CDATA[Pengelolaan Transportasi Berwawasan Lingkungan Sebagai Dampak Perkembangan Perkotaan Tak Terkendali (Studi Kasus Kota Semarang) ]]>
<![CDATA[Purwanto, Djoko]]>;
<![CDATA[Ismiyati, Ismiyati]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9250
<![CDATA[The increasing of urban population growth would affect to the increasing settlement growth which expanding uncontrollably toward the suburbs, this condition will influence transportation problem and 70 % air pollution comes from transportation sector (BAPEDAL in 2006). Semarang cities as case study deals with congestion problems in almost all road network; the most surprising thing is with the presence of mass transit services which is BRT, both BRT corridor I and corridor II, it still have a load factor of 27% (Ilham Hussein, 2012). This study aims to: manage environmentally sound public transportation based on the characteristics of people and city of Semarang. The result of study concluded that in order to manage environmentally sound transportation by creating an unified and integrated mass transit; which is by cutting the BRT routes that are less effective and too long, directed to feeder transport from the tip end of track to the end of beginning of peple mobility with a public transport like mini bus for a distance of > 500m and bike or walking track to feeder within 200 – 500m equipped with convenient bicycle and pedestrian infrastructures. Whereas, for the suburbs mobility to other suburbs it can use rail-based mass transportation (MRT).]]>
<![CDATA[Perilaku dan Kekuatan Sambungan Kolom pada Sistem Beton Pracetak ]]>
<![CDATA[Yuniarto Adi, Rudi]]>;
<![CDATA[Nurhuda, Ilham]]>;
<![CDATA[Sukamta, Sukamta]]>;
<![CDATA[Fitriani, Intan]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9241
<![CDATA[At this time, the architecture and design of the existing floor plan often changes according to the needs and tastes of the owner in accordance with the changing times. This research was conducted as precast concrete structures become even more important with the increase in man's desire to change the design of his home without spending enormous cost. This study aims to investigate the stiffness and study the behavior of precast concrete between monolith column with no connections and the column with connection. The connection used is dry joint using a plate and screw nut. The results obtained are the stiffness of the test specimen column with no connections is smaller than the test object column with connection. The modulus of elasticity of the column without a connection greater than the column with connection. Cracks that occurred in the test object columns without connection occurs faster than the test object columns with connection and both, flexural cracks occur first and then cracked in shear.]]>
<![CDATA[Perilaku Beban-Perpindahan Aksial Pre-Buckling dan Post-Buckling pada Struktur Kolom Elastis ]]>
<![CDATA[Sumirin, Sumirin]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9246
<![CDATA[The analysis of column buckling is generally based on the analysis of linear eigenvalue problem to obtain the buckling load. In the linear analysis we do not know the load-displacement behavior especially after buckling occurs. This research studied the behavior of the elastic column on the stage pre-buckling and post-buckling by finite gemetrically nonlinear of finite element method. Difficulties in equilibrium problem at around the point of buckling load solved by using the Newton-Raphson incremental method with constant arc- length technique. To generate the initial touch of buckling columns are very small lateral load or by providing the initial lateral deformation is very small. Axial load-displacement curve column finite element analysis results compared to the results of previous reseacher. An axial load-displacement curve bilinear proposed in this study.]]>
<![CDATA[Transmisi Gelombang pada Pemecah Gelombang Ambang Rendah Ganda ]]>
<![CDATA[Surendro, Bambang]]>;
<![CDATA[Yuwono, Nur]]>;
<![CDATA[Darsono, Suseno]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9242
<![CDATA[Coastal protection efforts can be done in various ways, among others, by making alow threshold breakwaters (sumerged breakwater). Every building in addition there is certainly no shortage of excess. With several weaknesses breakwater low threshold, then conducted research with the title “Wave Transmission At Low Threshold Dual-breaking waves". The study was conducted in the Hydraulic laboratory of the Faculty of Engineering, Tidar Magelang University, with variations of the model as follows: Model I : single low threshold breakwater piles of stones (PGARTTB) with peak width (B)=120 cm Model II : a low threshold double breakwater piles of stones (PGARGTB) formed by reducing material PGARTTB protective stone that is in the middle as much as 8.89%, 20%, 33.33%, and 46.67%. The results showed that: a) Reduction of material protection on the stone breakwater lowthreshold single pile of stones (PGARTTB) affect the magnitude of the wave transmission, b) reduced protective stone will increase the value of the wave transmission coefficient c) for each reduction of 1% a protective stone, waves of up 0.2788% transmission, d) the increase in transmission waves are caused by the reduced friction between the base and peak wave breakwaters low threshold.]]>
<![CDATA[Pengaruh Kerja Lembur pada Produktivitas Tenaga Kerja Konstruksi ]]>
<![CDATA[Sumarningsih, Tuti]]>
<![CDATA[ MEDIA KOMUNIKASI TEKNIK SIPIL Volume 20, Nomor 1, JULI 2014 ]]>
Publisher : <![CDATA[Department of Civil Engineering, Diponegoro University ]]>
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DOI: 10.14710/mkts.v20i1.9247
<![CDATA[In order to meet the construction project completion, project duration often be compressed and work accelerated, especially in case the project held behind the schedule. One of several methods to accelerated a schedule is applying overtime work. Overtime work achieves schedule acceleration by increasing the amount of hours worked by labor beyond the typical 8 hours worked per day and 40 hours worked per week. Although there may be positive short-term benefits to working an overtime schedule, the long-term consequences are typically viewed as detrimental, such as fatigue, reduced productivity and safety, and increased absenteeism. The objective of this research is to present the effects of schedule overtime on construction labor productivity, and the impact of loss labor productivity to the labor costs. Overtime in this research is defined as the hours worked beyond the normal straight time hour (08.00 – 16.00). The data were collected by field observation and interview with the foremen. Field observation held in four weeks, with 28 labors included. The result of this research show a decrease labor productivity by 8,87% - 11,84%, and increase labor costs by 58,63% - 79,31%.]]>
