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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 10 Documents

Search results for , issue "Volume 22, Nomor 2, DESEMBER 2016" : 10 Documents clear

Studi Upah dan Beban Biaya Pekerja Konstruksi di Indonesia (Studi Kasus: Pekerja Konstruksi Gedung di Pulau Jawa) Stevia Lukmanasari, Srie Heruyani; Soemardi, Biemo W
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Labor wages have a large portion (approximately 30%) of construction contract value. Therefore, company should pay attention to labor wages. Unfortunately, existing data about construction labor wages in Indonesian are only showed as daily wages (for labor) and monthly wages (for employee/permanent staff), while thereâ€™s no information about their labor burden. Therefore, objectives of this study are to identify the component and structure of construction labor burden and wages in Indonesia and also to identify all factors related. Research method used int this study are empirical and inductive methods. After all data has been collected from field survey, description of the construction labor burden and wages model was compiled into its components. Moreover, comparison analysis used to identify factors related to construction labor burden and wages. Results of data processing and analysis shows that: 1) Construction labor burden in Indonesia for both employee/permanent staff and labor commonly consist of direct and indirect payment, and conditional and lumpsum payment, but there are different distributions between each kind of labor. 2) Construction labor burden and wages in Indonesia commonly depend on company profile, project profile, and labor profile.

Evaluasi Kuat Tumpu Alat Sambung Baut pada Papan WPC dari Limbah Sengon dan Plastik HDPE Arnandha, Yudhi; Satyarno, Iman; Awaludin, Ali; Fardhani, Arfiati
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Wood Plastic Composite (WPC) is wood based material that been produce by mixing sawdust as main composition and plastic polymer as bonding agent. Nowadays, WPC board already been produced in Indonesia using Sengon sawdust and recycle HDPE plastic. Sengon sawdust was used as WPC since its availability from plywood production waste, moreover HDPE plastic considered had higher strength and more rigid than PET plastic. WPC occasionally being used as non structural material, moreover from previous study about mechanical properties of WPC, it was found that WPC Sengon has high shear strength around 25 â€“ 30 MPa. These lead that WPC Sengon had a potential used as shear wall sheathing, thus additional research need to be conducted in order to study the type of bolt and diameter of the bolt can be used for these shear wall. This study aimed to investigate the dowel bearing of bolt using full hole method based on ASTM D5764 with type and bolt diameter as specimen variation. Two types of bolt were used in this study; stainless bolt and standard bolt with diameter each of 6 mm, 8 mm, 10 mm and 12 mm. According to ANOVA, there was insignificant result between stainless bolt and standard one, but there was significant result based on diameter of the bolt. Hereafter, it can be recommended the used of 10 mm diameter of bolt for structural purpose with dowel bearing strength around 67 â€“ 70 MPa.

Pemodelan Hubungan Parameter Karakteristik Lalu Lintas pada Jalan Tol Belmera Lubis, Adina Sari; Muis, Zulkarnain A; Nasution, Triana
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Belmera toll road in North Sumatra was the first toll road, links Belawan-Medan-Tanjung Morawa. The aim of this research is to find the relationship model between speed, density and volume on Belmera toll road based on a traffic study. The traffic study which embodies volume study and the speed of vehicles were divided into 5 vehicle classification, into 2 traffic lines (Entrance and Exit Tanjung Morawaâ€™s toll gates), was conducted on Friday and Saturday around the peak hour on each traffic current. The study concluded that Greenberg model is the best approach for traffic current on Belmera toll road. According to Greenberg model we acquire a mathematical equation of the relationship between speed-density, volume-density, and volume-speed of Exit Tanjung Morawaâ€™s toll gates as: S=98,100-6,700LnD, V=98,100Dâ€“16,700DLnD, V=355,758Se-0,059S and the Entrance as: S=99,312â€“17,442LnD, V=99,312Dâ€“17,442DLnD, V=297,033 Se-0,057S. Based on the observation and application of Greenberg model, traffic indicator (v/c, flow, density) of both current revealed that the level of service of Belmera toll road is C and itâ€™s a fine traffic performance so far. The speed rate (km/hour) and density (pcu/km) revealed that the acquired rate from the observation is smaller than the application of Greenberg model.

Operator Kawin Silang pada Algoritma Genetik Riil untuk Variabel Rencana Selalu Positif Arfiadi, Yoyong
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Genetic algorithms have been used to solve various optimization problems. One of the advantages of genetic algorithms is that they have the ability to solve complex optimization problems in a simple way. By using genetic algorithms, the near global optimum can be achieved easily. Although in the early development, binary coded genetic algorithms are more popular, recently real coded genetic algorithms are widely used to solve engineering problemâ€™s optimization. The advantage of using real coded genetic algorithms is the ability of the crossover operator to explore a larger domain of interest. As a result the use of crossover in real coded genetic algorithms may have a detrimental effect, as it can explore the domain that is very far from the expected domain. In the civil engineering area, most variables are positive. Therefore, it is needed to develop a crossover operator that can produce positive-only offspring. In this paper an asymmetric crossover is proposed to solve this problem. It is shown in the experiments that this crossover has a good performance in achieving optimum results.

Kapasitas Lentur Balok Beton Tulangan Bambu Ori Takikan Jarak 20 dan 30 mm Budi, Agus Setiya; Rismunarsi, Endang; Kharir, Kharir
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Bamboo is one of the potential material as a substitute for steel reinforcement. This paper will discuss the flexural capacity of concrete beam with Ori bamboo reinforcement notch V type. The use of the notch is expected to minimize the effects of shrinkage and slip. This study uses laboratory experimental method. Bamboo is used at least 2.5 years old. Bamboo in a notch with a V-shape with the distance between the notch is 2 cm and 3 cm. The sample size used in the form of a concrete beam is 11x15x170 cm. The compressive strength of concrete (fcâ€™) used was 18.3 MPa, yield strength of bamboo (fyb) with nodia is 276.56 MPa, and a yield strength of steel (fys) is 486.6 MPa. Static loading is done with third point loading system. For comparison also tested steel reinforcement concrete beam with Ã˜-8 mm. Based on test results, the average value of flexural capacity test on a sample of concrete beams reinforced bamboo Ori V notches on the distance between the notch 20 mm is 0.412 tm, and the average value of flexural capacity on the distance between the notch 30 mm is 0.387 tm and the average value of flexural capacity of concrete beam test with steel reinforcement Ã˜-8 mm is 0.516 tm.

Kajian Rumput Vetiver Sebagai Pengaman Lereng Secara Berkelanjutan Susilawati Susilawati; Veronika Veronika
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Flores is the island in the NTT province, which has a row of volcanoes, with the mountainous topography. Transportation is state road, along the coast with high cliffs on the other side. That often causes problems during the rainy season as several landslides. Various methods are used to overcome this landslide. Studies on vetiver grass as slope protection done to secure the slopes on a sustainable basis. First, an evaluation done for the slope construction along the slope safety from Nangaroro to Aegela, which are using vetiver grass as a safety slopes in addition to other security structures. It is also done for the same job of the road from Ende to Nangaroro and Ende-Detusoko. This study covers the technical aspects, ecological, construction and sustainability of the infrastructure that has been built. Furthermore, it is done the literature study to find more appropriate method, environmentally friendly and sustainable in securing these slopes problematic. From the literature studies and the field survey done, it can be concluded and recommended several models of eco-friendly structural design of vetiver grass and geotextile for slope protection, which is based on technical-meet standard strength, ecologically-friendly environment, locally-developed local wisdom, so it is easy to construct.

Kinerja Model Fisik Konverter Energi Ombak Rangkaian Gear Searah pada Periode Ombak yang Bervariasi Muchtar, Masjono; Manjang, Salama; Suriamiharja, Dadang A; Thaha, M Arsyad
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

To date there were few research on the effect of non-linearity properties of the ocean waves on the performance of wave energy converter (WEC), which uses a series of unidirectional gear. One such parameter is the variation of wave period. The influence of wave period variations on the performance of physical model of the wave energy converters have been investigated at the Hydraulics Laboratory, Department of Civil Engineering, Hasanuddin University Indonesia. This WEC physical model was fabricated and assembled at Politeknik ATI Makassar Indonesia. The investigation steps consists of physical model development, physical model investigation at wave flume prior to the wave periodÂ variation, measuring input output parameters of the physical model under test and empirical model formulation based on observed data analysis. Physical model test carried out on the wave flume at the Hydraulics Laboratory of the Department of Civil Hasanuddin University, at a water depth of 25 cm, wave height between 5-9 cm and wave period between 1.2 - 2.2 seconds. Investigation result based on flywheel radial speed (RPM) and torque (Nm) indicated that calculated harvested power was inversely proportional with the wave period. The longer the period of the waves, the energy produced is getting smaller. The derived empirical formula was y = -85.598x + 208.53 and RÂ² = 0.8881. Y is energy produced (Watt) and X is the wave period (Second). Formulations generated from this study could be used as a reference for future research in dealing with wave period variations on a design one way gear wave energy converter as a source of renewable energy.

Korelasi Skid Resistance dengan Kedalaman Tekstur pada Permukaan Perkerasan Lentur Pandia, Indra Jaya; Lubis, Adina Sari; Rambe, Andy Putra
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

Skid Resistance is the force generated between the pavement surface and vehicleâ€™s tires to resist the vehicle advance motion when braking. In this research the correlation between skid resistance value and texture depth on the pavement surface will be determined. The skid resistance value determined by using the British Pendulum Tester (BPT) and to determine the texture depth used Sand Patch Method. The research is conducted directly on a macro textured surface with two methods. The first method is applied on Ngumban Surbakti Road where the samples tested with the same distance from the edge of the pavement along the road; The second method is applied on Jend. Sudirman Road where the samples tested with specific distances from the edge of the pavement until the median. From the results of the analysis, there are some conclusions: (1) there is a positive correlation between the texture depth and skid resistance with a coefficient of determination (R2) = 0.028 on Ngumban Surbakti Road and (R2) = 0.191 onÂ Jend. Sudirman Road;(2) the increase of skid resistance value is directly proportional to the increase of surface texture depth value; and (3) the different methods did not cause significant yield differences.

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.

Pengaruh Perubahan Iklim terhadap Hidrograf Banjir di Kanal Banjir Timur Kota Semarang Suripin, Suripin; Kurniani, Dwi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 22, Nomor 2, DESEMBER 2016
Publisher : Department of Civil Engineering, Diponegoro University

East Flood Way is one of the rivers in Semarang City that often cause flooding. Flood water level in the East Flood Way is affected by the discharge of storm water runoff and tide (rob). Facts on the ground indicate that the flood water level in the canal tends to increase from year to year. One possible reason is the increased flood discharge associated with climate change, besides the impacts of land use changes. This study aims to analyze the impacts of climate change on rainfall characteristics and their effects on flood hydrograph in the East Flood Way. The study begins with the collection and analysis of historical rainfall data to get a change of rainfall characteristics over time. The flood hydrograph was then analysed by HEC HMS. The results showed that in the period of last 30 years annual rainfall and maximum daily rainfall tended to increase of 22.64 mm / year and 2.56 mm / year consecutively, while the number of rainy days tend to decrease of 4 days / year. As a result of changes in the characteristics of the rainfall, the flood discharge of East Flood Way is expected to increase in the range between the 15.10 m3/s (31.5%) for 2-year return period up to 32.28 m3/s (25.5 %) for 200-year return period.

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