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Jurnal Spektran

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Published by Universitas Udayana

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Core Subject : Engineering,

Civil Engineering, Building, Construction & Architecture

Jurnal Spektran merupakan berkala ilmah online yang dikelola oleh Program Magister Teknik Sipil, Program Pascasarjana Universitas Udayana. Terbit pertama kali pada bulan Januari 2013 dan selanjutnya diterbitkan 2 kali setahun setiap bulan Januari dan Juli. Jurnal Spektran mempublikasikan hasil penelitian dan kajian dari mahasiswa, akademisi, praktisi dan pengamat masalah ketekniksipilan.

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Articles 252 Documents

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PENERAPAN REKAYASA NILAI PADA PROYEK PEMBANGUNAN GEDUNG SEKOLAH (STUDI KASUS PEMBANGUNAN GEDUNG SEKOLAH SANUR INDEPENDENT SCHOOL) Anak Agung Gde Agung Yana; Nyoman Martha Jaya; I Wayan Gde Erick Triswandana
JURNAL SPEKTRAN Vol 7 No 1 (2019): Vol. 7, No.1, Januari 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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THE IMPLEMENTATION OF VALUE ENGINEERING ON SCHOOL BUILDING CONSTRUCTION PROJECT (CASE OF STUDY SANUR INDEPENDENT SCHOOL) ABSTRACT In a construction project, the cost is one of the factors that determine the sustainability of the project, especially in the case of study school building project at Sanur Independent School. Because of that, the austerity measures undertaken to produce an economical construction project. The selection of materials and construction methods can precisely determine the amount of savings to be gained in the implementation of the construction project, wherein the choice of materials and alternative methods will not necessarily reduce nor change the value of the function, quality and architectural value of the project itself. Therefore there is a need for job costing analysis to control these aspects. One of the methods that used for cost efficiency in a construction project especially on the building construction is Value Engineering Method that is a systematic way of defining the value of a subject to its function so that an innovative and structured approach can be adopted with the aim of reducing unnecessary costs. By using this method can obtained two alternative combinations of designs such as , the best combination of alternative designs and the cheapest combination of alternative design, and based by the result of the researched, by using a combination of the best alternative design on this construction project wherein the initial BoQ have a value of Rp 2,003,372,657.68 obtained savings of Rp 36.492.428,34 atau 1,82 %. While using a combination of the cheapest alternative designs obtained savings of Rp 248,161,362.38 or 12.39 %.

PEMANFAATAN SUMBER DAYA AIR DAS YEH PENET SEBAGAI AIR IRIGASI DAN AIR BAKU PDAM I Made Mudiasa; IG. B Sila Dharma; I Ketut Suputra
JURNAL SPEKTRAN Vol 5 No 1 (2017): Vol. 5, No. 1, Januari 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract : Tukad Penet is one of the biggest rivers in Bali which is used to support farming and fresh water demand. The increasing of water demand in various sectors such as for irrigation and drink water recently using water from Yeh Penet source shows the over use of its water has caused some conflicts between the use of the water user for irrigation and another use. Therefore, it was needed to review the use of Yeh Penet water to see how big the potential of its water that could be exploited to support the water source demand. The optimal analysis of water usage was carried out in six regional irrigation (DI) used Penet river water such as DI Peneng, DI Kacangan, DI Luwuscarang Sari, DI Penarungan, DI Kapal and DI Munggu. This analysis was based on cropping, planting and water management as well as a maximum water raw demand of the regional company of drinking water (PDAM) in Tabanan and Badung regency. Based on the simulation result, water availability in each irrigation regional (DI) depended on the cropping and planting. It was needed to provide the planting and rotation system for some irrigation regionals in river fluctuation discharge. The deficit of irrigation water balance occurred in DI Peneng, DI Luwuscarang sari, and DI Kacangan. The optimal use of irrigation water in the third irrigation regional was carried out by using planting stimulation and water management. The water balance analysis result at watershed in the part of downstream Penet watershed showed the availability of water surplus occurred in alternative plan I and II. The water balance analysis showed water availability in alternative plan I of a minimum 0.04 million m3 and maximum 1.43 million m3, whereas in alternative plan II the wasted water availability of a maximum 0.25 million m3 and a maximum 1.51 million m3. The potential development of Penet watershed in alternative plan I was 0.67 million m3 (0.52 m3/sec) and in alternative plan II was 0.76 million m3 (0.58 m3/sec) was not able to support the total water demand in Badung and Tabanan regency. Besides, the water source development of Penet watershed only occurred in downstream part of Yeh Penet river to avoid some conflicts of water utilization in Penet watershed.

STUDI EKSPERIMEN PELAT BETON BERTULANG PRACETAK SATU ARAH BERPENAMPANG “U” SEBAGAI ALTERNATIF STRUKTUR LANTAI I Nyoman Ardika; I Made Alit Karyawan Salain; I Made Sukrawa
JURNAL SPEKTRAN Vol 7 No 2 (2019): Vol. 7 No. 2, JULI 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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This research is motivated from the thought how to apply advantage-precast method and resolve deficiency conventional method in implementation of construction reinforced concrete slab structures multi-storey building. Therefore conducted preliminary experiments by making structure slab of some elements one way precast reinforced concrete slab. From some preliminary experiments with the problems encountered, finally defined cross-section “U” upside down, with f'c 15 MPa design and 1300 mm long with cross sectional size 320 mm x 150 mm x 40 mm, tensile reinforcement 2Ø5,6987 mm with yield stress of steel 188 MPa. In this research will be reviewed some problems, that is capability slab U to support service load until cracking moment, maximum length U slab to support service load design until cracking moment, and maximum length U slab to support service load design until maximum deflection. These three problems completed by carrying out the load test by using water as a testing load and the physical properties of the material which is used for reinforced concrete. Based on the analysis of test data obtained U slab able to support three times service load design (4,310 N/mm) without cracking, maximum length U slab to support service load design without cracking is 2300 mm, and maximum length U slab to support service load until maximum deflection is 3302,6 mm. Keywords: U-Slab, precast, slab structure

APLIKASI LEAN CONSTRUCTION UNTUK MENGIDENTIFIKASI PEMBOROSAN PADA PROSES LOGISTIK PROYEK Sri Sugiantari; I G. A. Adnyana Putera; Gd. Astawa Diputra
JURNAL SPEKTRAN Vol. 3, No. 2, Juli 2015
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Construction logistics process hides some non value added activities which are difficult to avoid, those activities have extended leading time which are not only cause the delay of the project completion, but also spend more production expenses that effect to the profit itself. Data rising by questionnaire is conducted in 22 qualified contractors around Denpasar with 3 respondents in each contractor. Data raising by questionnaire is done in 2 stages, first stage is questionnaire which identify wastes. Second stage are questionnaire which determine waste causes. Field observation is aimed to create a value steam mapping of construction logistic process. It had been found 7 types of wasting which often occurs. They are the field inspection, the purchase of one type material in different suppliers, awaiting the instruction of the owner, the delay of the material transportation, the purpose of approval or additional signature, clarification needs, awaiting the instruction of the superior. Afterwards, the cause of each wasting, namely the workers inspected are less skilled, the bad quality of goods given by the suppliers, the owner procedures which require workers await the instruction before working, material loading-unloading and distribution process is too slow, a complicated bureaucratic system and unclear information. And from the observation, it is obtained that there are some non-added activities occurred throughout the value stream of the construction project logistics, among them awaiting the approval of the supervisors, transportation, awaiting the order process which is still done manually and product defects during the material selection. As a wasting reduction, it is necessary to simplify the process, create a standard operation procedure, provide enough training to the workers so they are more independent, use an information technology to ease the delivery of the report, hold a long-term contracts with the suppliers and the internal customers.

PEMODELAN PERILAKU STRUKTUR DINDING KAYU AKIBAT BEBAN TSUNAMI Gede Pringgana
JURNAL SPEKTRAN Vol 6 No 2 (2018): Vol. 6, No. 2, Juli 2018
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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ABSTRAK Rumah kayu merupakan salah satu tipe bangunan yang paling rentan terhadap bencana tsunami. Penelitian ini bertujuan untuk mempelajari perilaku dinding rumah kayu akibat beban lateral tsunami. Metode yang digunakan dalam penelitian ini adalah metode smoothed particle hydrodynamics (SPH) yang digunakan untuk pemodelan gelombang tsunami dengan perangkat lunak DualSPHysics dan metode element hingga untuk memodel perilaku struktur dinding kayu menggunakan perangkat lunak ABAQUS/Explicit. Di dalam penelitian ini, pemodelan gelombang tsunami dilakukan berdasarkan eksperimen yang dilakukan oleh Linton et al. (2013). Pemodelan gelombang tsunami menghasilkan riwayat beban-waktu yang kemudian pada tahap pemodelan elemen hingga, digunakan sebagai beban lateral yang bekerja pada permukaan vertikal struktur dinding kayu. Analisis dynamic-explicit digunakan dalam pemodelan elemen hingga, oleh karena beban yang dikerjakan merupakan tipe beban dengan durasi waktu yang singkat. Simulasi elemen hingga dilakukan selama 20 detik dengan peningkatan waktu 0,005 detik. Struktur dinding kayu memiliki ukuran panjang 3,58 m dan tinggi 2,44 m, dengan perletakan jepit. Dinding kayu dibagi dengan ukuran mesh 0,02 m pada bagian yang terbebani dan semakin ke bagian atas ukuran mesh berangsur-angsur membesar. Elemen delapan-nodal linear brick C3D8R digunakan untuk memodel elemen dinding kayu. Hasil analisis menunjukkan bahwa, secara umum, lendutan numerik bersesuaian dengan lendutan eksperimen dan lendutan numerik maksimum 10% lebih besar dari data eksperimen. Tegangan tarik maksimum numerik terjadi pada tengah batang horizontal dan hal ini sama dengan lokasi keruntuhan tarik pada uji eksperimen.

MODEL PENGANGKUTAN SAMPAH DI KOTA BANGLI Pande N Sari Saraswati; I G. B Sila Dharma; I Gst Ketut Sudipta
JURNAL SPEKTRAN Vol 1, No 2, Juli 2013
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

The garbage transportation in Bangli City is currently done using a direct individual pattern (door to door). The vehicles used are dump trucks which are not covered, so they pollute the areas they pass by. Most of the vehicles are in bad condition. This study was aimed at identifying the transportation routes, the number of vehicles needed, the temporary place of garbage disposal ‘Tempat Pembuangan Sementara’ (TPS), and the rate of garbage retribution. The research method included the sample of garbage from the place of residence and the place of non residence based on SNI-19-3964-1994 used as a reference. This model used five compactor trucks for carrying garbage from 283 container bins with capacity of 0.36 m3, and one armroll truck for carrying the market garbage from four loudhaul with capacity of 6 m3 per day. The amount of retribution is analyzed based on the calculation of investment feasibility for 10 years time at 18% MARR interest rate, with an assumption that there was subsidy from the government. It was found that the value of NPV (Net Present Value) was Rp. 35.673.540,99, the value of BCR (Benefit of Cost Ratio) was 1.021 and the value of IRR (Internal Rate of Return) was 19.11%. The monthly rates of retribution were Rp. 2,000.00/family, Rp. 20,000.00/school unit, Rp. 25,000.00/office unit, Rp. 8,000.00/shop unit, Rp. 20.000.00/restaurant unit, Rp. 2,000.00/hotel/accommodation unit, and Rp. 6,000.00/market trader.

ALOKASI DAN DISTRIBUSI AIR DI DAERAH IRIGASI JATILUHUR INDONESIA: EVALUASI DAN TANTANGAN Rahmat Sudiana; Doddi Yudianto; Zhang Xiuju
JURNAL SPEKTRAN Vol 5 No 2 (2017): Vol. 5, No. 2, Juli 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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Indonesia has rich natural resources including water resources. The abundance of water resources is characterized by an annual rainfall averaging about 2790 mm. Jatiluhur irrigation area is one of large irrigation system in Indonesia which plays main role for national food and agriculture defense. It receives water from Djuanda Multipurpose Reservoir located in Citarum River West Java Indonesia. This reservoir is responsible to irrigate 240,000 ha paddy field, raw water for domestic municipal industrial (DMI) and hydropower generation. The water is released from the reservoir to Curug Diversion Weir where the water is diverted to West Tarum Canal (WTC), East Tarum Canal (ETC) and North Tarum Canal (NTC). Mechanisms for water allocation and distribution are professionally managed by Jasa Tirta II Public Corporation (PJT II). Although provision of irrigation system seems performing well, some aspects still need improvement and development. The important issue for improvement is quality and reliability of basic data required to prepare the water allocation plan and distribution schedule. Taking into account future developments which will increase combined water demand. Consequently, there is a need to investigate how efficient the system is working currently and which improvements can be proposed to increase overall water use efficiency. Water balance in the Jatiluhur irrigation system theoretically capable to fulfill water demand until 2025 but climate change issue should be considered as period of dry season and wet season will be shifted. Based on the research scenario, dry season will be longer and wet season will be shorter with more intense rainfall. Keywords: Jatiluhur irrigation area, Djuanda multipurpose reservoir, water allocation & distribution, water efficiency, water balance

PENGGUNAAN TERAK NIKEL SEBAGAI AGREGAT DALAM CAMPURAN BETON Wayan Mustika; I M. Alit K. Salain; I K. Sudarsana
JURNAL SPEKTRAN Vol 4 No 2 (2016): Vol. 4, No. 2, Juli 2016
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Nickel slag is one kind of nickel ore smelting waste after the combustion process. Production of nickel slag PT. Antam Pomalaa Kolaka Southeast Sulawesi province during the period 2011-2012 period approximately 1 million tons of slag / year, with a nickel content in ore processing of nickel is between 1.80% to 2.00%. Visually, the physical form of this nickel slag aggregate resembles. Research on the use of nickel slag as an aggregate in concrete mixture is carried out using a cylindrical specimen with a diameter of 15 cm and 30 cm high by 48 pieces were tested at 28 days with some variations in the mix. Variation 01, 100% natural aggregate, variation 02, nickel slag as coarse aggregate, variation 03, nickel slag as fine aggregate, and variation 04, nickel slag as coarse aggregate and fine aggregate. Aggregate gradation in the mixture is set and is designed so that it meets the specifications gradation mix for maximum aggregate size of 40 mm. The composition of the concrete mixture used is a mixture of concrete with the ratio of cement : fine aggegate : coarse aggregate is 1: 2: 3 in a weight ratio with cement water ratio (fas) is set at 0.5. The results showed that when compared with the use of natural agregate, terak nickel is used only as a coarse agregate, a fine agregate only and combined agregate coarse and fine agregates resulting slump values ??fell 39.47%, an increase of 55.26%, and an increase of 34.21%. As a coarse agregate, terak nickel increases the compressive strength, modulus of elasticity and splitting tensile strenght, respectively for 42.27%, 19.37% and 23.46%. As fine agregate, nickel terak resulting value of compressive strength, modulus of elasticity and tensile strength divided down respectively by 16.75%, 6.70% and 24.58%. As a combination of coarse and fine agregate, terak nickel increases the compressive strength, modulus of elasticity and splitting tensile strenght, respectively for 10.31%, 9.26% and 6.70%.

FAKTOR SUKSES PENERBITAN IZIN MENDIRIKAN BANGUNAN (IMB) DI KABUPATEN GIANYAR BALI Nyoman Martha Jaya; G.A.P. Candra Dharmayanti; Ida Ayu Cri Vinantya Laksmi
JURNAL SPEKTRAN Vol 7 No 2 (2019): Vol. 7 No. 2, JULI 2019
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

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THE SUCCESS FACTORS IN THE ISSUANCE OF BUILDING PERMIT (IMB) IN GIANYAR REGENCY, BALIABSTRACTThe improvement of development sector in Gianyar Regency has increased every year. This leads to the increasing of the number of the registration of Building Permit (IMB). Normally, IMB registration process takes 7 working days.. In fact this process can take longer than 7 working days, therefore disappointing to the applicants. The number of complaints that arise as well as the occurrence of cases of illegal levies in the permit service IMB caused the accountability of the service and the level of satisfaction of the applicants were questioned. Based on this situation, there is a need to analize the factors that influence the accountability and the level of satisfaction of the applicant. This research used a mixed methodinvolved survey and interview using a questionnaire. The respondents were selected based on nonprobability sampling technique (purposive sampling), covered the respondent which completed all stages of IMB’s registration process, ranging from the consultation stage to the issue of the permits in 2017. Analysis was performed using Analytical Hierarchy Process (AHP) method by assessing the importance level among alternatives under certain criteria, to obtain the weight of each alternative. The results showed that several important factors that influence on the evaluation of accountability of IMB service and the satisfaction of the applicant included timeliness (14,6%), accuracy and honesty (12,8%), responsible and non-discriminative (12,8%), and accuracies of staff (12.6%). Meanwhile, the important factors related on the evaluation of the applicant's satisfaction were timeliness (15.0%), responsible and non-discriminatory factor (13.3%), retribution cost factor (12.7%).

ANALISIS KEBUTUHAN PENGEMBANGAN ANGKUTAN KHUSUS KARYAWAN PADA PUSAT PEMERINTAHAN KOTA DENPASAR DI LUMINTANG Ni Pt. Emmy Oktariani; P. Alit Suthanaya; I G. Putu Suparsa
JURNAL SPEKTRAN Vol. 3, No. 1, Januari 2015
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Abstract : Employee transportation service is one of the traffic management method that imitate carpooling system which can decrease the used of private vehicle that being use towards the centers of activity with employee transportation services. The purpose of this research are to analyze socio – economic characteristic, operational system, vehicle operating cost and cost reduction. This research was conducted in Lumintang Denpasar. The method that was used in this research include field survey such us questionnaire spreading to the respondent and also doing a direct interview to the related parties. Result of the analysis indicated that the majority of employee’s (88,47%) used motorcycle with average travel distance of 5 km’s, 4 employee transportation routes were planned with time cycle between 23 to 58 minutes , headway between 2 to 10 minutes and employee transportation operational cost is between Rp.252.531 to Rp.270.241 every day. operational expense saving with total Rp. 8110.332.019 and fuel saving as much as 6.624 liters a year

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