IPTEK Journal of Proceedings Series
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A Suggested Model to Simulate the Distance Between Signalized Intersection and U-turn on Urban Road (Study Case: Middle East Ring Road, Surabaya)
Get PDFU-turn movement possible generates queueing on U-turn system. Queueing which occurs near intersection could affects to intersection performance. The intersection performance that influenced is speed of vehicle to pass the intersection. The impact is interlock of intersection movement possibly occur. The objective of the research is to determine minimum distance of U-turn and intersection based on Poisson Process Simulation. Location of this research is U-turn on Surabaya, Indonesia with distance from the nearest intersection about 202 meters. Queueing will occur when arrival time of vehicle from intersection is above of total arrival time and service time of vehicle from U-turn. The result of simulation is total queuing cause of operational U-turn about 10 vehicles or 60 meters. The reduction distance of U-turn and Intersection is 142 meters, and it’s still fulfil the requirement of regulation about the distance between opening and intersection
Infrastructure Assessment for Developing Route Evacuation of Bengawan Solo River Flood at Bojonegoro District
Get PDFBengawan Solo River is the biggest watersheet in java, Indonesia. It is reach between two provinces, Central Java and East Java. The flood’s happens almost every year on this river. The floods caused by increased rainfall on rainy season, and land use in upstream has changed too. The community not want to abandon their land so, they must living and adaptable with disaster. Beside that, decrease of river’s flow capacity and catchment area are the significant factor of causing floods in Bengawan Solo river. The villages nearest with river get susceptible floods area. In Bojonegoro district there was 23 of flooded sub-district. Using supported information and map of road network, topography, provisional care, and infrastructure condition. Then assessment of infrastructure damaged such as roads, bridges, railway, etc. from that information and assessment, capable to created evacuated lines map for flood’s victim in Bojonegoro district using GIS. This map can useful as a guide the victim to safety line and nearest provisional care when flood disaster has come out
Compression Strength Concrete with Pond Ash Lati Berau
Get PDFHandling of coal burning waste of thermal power plant in Lati, Berau district, East Kalimantan province, which is recommended by the department of environmental impact management is to dispose the coal ash into pools flowed water so that coal ash did not fly and cause air pollution. As known that coal ash waste is included hazardous and toxic waste, therefore managing it carefully is a necessity. Sediment or heap of coal ash in the sedimentation pond that is flowing with water is called Pond Ash. This study is conducted by utilizing the pond ash as a replacement material in the concrete mix. The effect of the use of pond ash as partial replacement of sand, fine aggregate in the concrete mix, is studied using cylindrical specimen with a diameter of 100 mm and a height of 200 mm. Specimens were made by taking the ratio of the percentage of pond ash of 0%, 5%, 10%, 15% and 20% of the mixture of concrete with the constant water cement ratio 0.49 which is based on the results of normal concrete mix design. The compressive strength test of concrete was conducted at ages 1, 3, 7, 14, 28 and 90 days. The test results of compressive strength of concrete obtained showed an increase in compressive strength in accordance with the addition of pond ash in the mix. The adding of pond ash in the mix affected the increasing in the compressive strength of concrete, and the optimum strength is obtained in the ratio of 17% pond ash, which increased to 26.08 MPa from 25.05 MPa for concrete with and without pond ash mixes respectively, or increased by 4.12%. This increase is not significant and cannot be used as a reference, however, by the results of this study it can be concluded that the pond ash waste can be utilized for the manufacture of concrete as a partial replacement of sand
Analisis Kinerja Terminal Nilam Dalam Melayani Komoditi Curah Cair Di Pelabuhan Tanjung Perak
Get PDFTerminal Nilam Timur merupakan terminal yang mempunyai peruntukan dalam pelayanan komoditi curah cair di Pelabuhan Tanjung Perak. Meningkatnya arus kunjungan kapal di Terminal Nilam Timur dalam melayani komoditi curah cair (CPO) selama ini belum diimbangi dengan adanya pertumbuhan infrastruktur yang memadai, sehingga mengakibatkan rendahnya kegiatan operasional. Sementara itu jumlah dermaga yang digunakan untuk melakukan kegiatan bongkar muat sangat terbatas, sedangkan dari segi waktu cenderung sangat fluktuatif. Oleh karena itu dibutuhkan adanya analisis untuk mengetahui kinerja operasional Terminal Nilam Timur serta arah perbaikannya. Metode yang digunakan dalam kajian ini yaitu analisis deskriptif kondisi eksisting dengan SK–Dirjen Hubla, metode Important Performance Analysis. Kajian ini menghasilkan kinerja operasional dari segi aspek pelayanan kapal yang dinilai kurang baik pada tahun 2015 adalah ET:BT dan waktu pemanduan. Aspek pelayanan barang selama 4 tahun terakhir pencapaian kinerjanya dinilai kurang baik. Sedangkan aspek pelayanan utilitas fasilitas yang mempunyai nilai kurang baik tahun 2013. Berdasarkan analisis kinerja menurut persepsi pengguna jasa dengan metode IPA didapatkan atribut pelayanan yang memerlukan prioritas utama perbaikan yaitu waktu tunggu kapal untuk antri sandar di dermaga (waiting time berth), jumlah ketersediaan peralatan bongkar muat, produktivitas bongkar muat, kecepatan bongkar sesuai dengan penetapan, panjang/jumlah dermaga, tingkat pemakaian dermaga, ketersediaan tangki penimbunan (Silo), ketersediaan tempat berteduh di Terminal Nilam
An Investigation into the Use of Ducktail at Transom Stern to Reduce Total Ship Resistance
Get PDFIn this study it is aimed to investigate the application of ducktail at transom stern to reduce total resistance using Computational Fluid Dynamics (CFD). Ducktail is additional retrofit device to reduce effect of wetted transom causes wave and wake which cannot fully generate far away therefore absorbs energy. The method about saving energy possibilities was determined. The RANSE code CFX fitted with shear stress transport (SST) turbulence is used to carry out the simulation. Grid generator ICEM CFD is used to build hybrid grids for RANS code solvers. The result indicate ducktail reduce resistance significantly based on Froude numbers. The wave and wake fully transmitted into the far field. Ducktail becomes alternative appendages to increase energy efficiency
Studi Potensi Tampungan Air Sebagai Sumber Air Baku Kota Surabaya
Get PDFMakalah ini menyajikan hasil studi tentang potensi (kuantitas) dari tampungan-tampungan air yang ada di Kota Surabaya untuk digunakan sebagai sumber air baku. Tujuan dari studi ini untuk mengidentifikasi kebutuhan air dan menghitung potensi tampungan air di wilayah Kota Surabaya. Studi ini dilakukan dengan menghitung keseimbangan air pada tampungan-tampungan tersebut. Volume tampungan, inflow dari curah hujan dan outflow berupa evaporasi dan pengambilan air digunakan untuk menghitung keseimbangan air. Hasil studi menunjukkan bahwa tampungan air berupa wakduk/boesem yaitu boesem Morokrembangan memiliki potensi untuk pemanfaatan air dengan debit sebesar 0.2 m3/dt, sedangkan Boesem Kedurus memiliki potensi air sebesar 0.1 m3/dt. Potensi tampungan air Kali Wonokromo (long storage) yang dapat dimanfaatkan sebagai air baku pada musim kemarau hanya 0.1 m3/dt. Sedangkan tampungan air (long storage) di hulu Dam Gubeng (Kayun) di Kali Mas lebih besar dari Kali Wonokromo dan bisa mencukupi untuk pemanfaatan sebesar 0.5 m3/detik. Tanah Tanah Bekas Kas Desa yang dimiliki Pemerintah Kota Surabaya tersebar di wilayah Kota Surabaya terutama di Surabaya bagian Barat dan bagian timur masing-masing memiliki luas area tidak terlalu besar sehingga bila digunakan sebagai tampungan maka kapasitas tampungnya kecil. Potensi air tanah tawar di Kota Surabaya sangat kecil yaitu hanya sekitar 0.03 m3/dt
Perencanaan Anaerobic Baffled Reactor (ABR) Sebagai Instalasi Pengolahan Greywater di Kecamatan Rungkut Kota Surabaya
Get PDFKecamatan Rungkut merupakan daerah yang mengalami perkembangan cukup pesat akibat berkembangnya sektor ekonomi. Perkembangan tersebut berimbas pada peningkatan jumlah penduduk yang berbanding lurus dengan peningkatan produksi air limbah domestik. Komposisi air limbah domestik sebesar 50-80% merupakan greywater. Sebagian besar masyarakat masih menyalurkan limbah greywater ke selokan yang berakibat pada pengendapan sludge sehingga mengurangi volume saluran serta pencemaran badan air ditandai dengan terjadinya peristiwa eutrofikasi. Oleh sebab itu diperlukan perencanaan instalasi pengolahan greywater di Kecamatan Rungkut.Pengolahan greywater yang direncanakan adalah unit Anaerobic Baffled Reactor (ABR). Penggunaan ABR berdasarkan dengan pertimbangan kemudahan dalam operasional dan perawatan, aspek finansial serta ketersediaan lahan. Wilayah terlayani pada 3 kelurahan dengan penduduk terpadat yaitu Kelurahan Kedung Baruk, Penjaringan Sari, dan Rungkut Kidul.Berdasarkan hasil perhitungan, instalasi pengolahan greywater yang direncanakan berdimensi p x l x t sebesar 12,4 m x 2,3 m x 2,6 m. Biaya minimal yang dibutuhkan untuk membangun unit ABR adalah Rp. 142.000.000,- dan maksimal sebesar Rp. 149.000.000,- untuk tipikal pelayanan 100 KK. Biaya pembangunan tersebut dipengaruhi oleh lokasi peletakan yaitu di jalan atau lahan kosong
Numerical Analysis of Reinforced Concrete Piles under Blast Loads
Get PDFPile foundations are commonly used as foundation systems for high-rise buildings and bridges. This paper uses a fully coupled three dimensional numerical modelling procedure to study the performance of pile foundations subjected to ground shocks induced by surface explosions. The comprehensive numerical model includes the pile, surrounding soil, air and the explosive. Appropriate material models are incorporated and dynamic non-linear analysis is carried out using finite element techniques. The soil in which the pile is buried could influence the blast performance of the pile. A parametric study is hence carried out to evaluate the effects of soil properties of density, friction angle, cohesion and Poisson’s ratio on the blast performance of the pile. It is found that density and cohesion of soil have significant effects on the deflection of the pile under blast loading. Poisson’s ratio has some effect, but effect of the soil friction angle is not very significant. The findings of this study will serve as a benchmark reference for future analysis and design of pile foundations to blast loading
Advances in Smart Technologies for Structural Health Monitoring of Cable-stayed Bridges
Get PDFThis study deals with the general problem of developing smart technologies for vibration and impedance-based structural health monitoring (SHM) of cable-stayed bridges. The following approaches are implemented to achieve the objective. Firstly, vibration- and impedance-based SHM methods suitable for cable-stayed bridge are briefly outlined. Secondly, smart sensors are designed for vibration- and impedance-based SHM. Thirdly, the practicality of the smart sensor system is evaluated on a real cable-stayed bridge, Hwamyung Bridge in Korea. The system's performance is experimentally analyzed under various cable forces and weather conditions. Finally, the experimental modal parameters are identified by numerical modal analyses of the target bridge. Also, its structural parameters are estimated from the vibration-based structural identification using experimental modal parameters
3D Finite Element Modelling of Sheet Pile Wall Excavation: A Case study in Bangkok
Get PDFSheet pile wall has been used extensively as a soil retaining structure during the excavation process in soft ground. Meanwhile, finite element method (FEM) has been widely used as a numerical tool to predict wall movements due to soil excavation. In FEM, many factors including soil parameters, structures’ parameters and construction stages simulation influence the analysis results. This paper presents a modelling of sheet pile wall at deep excavation using 3D FEM. The study focuses on the structures’ stiffness modelling and the stages of construction simulation. The hardening soil model and its parameters adopted from previous study was employed in the analysis. To validate the model, an excavation site located in the center of Bangkok was selected to model. PLAXIS 3D – a commercial software for solving finite element problem was employed in this study. In overall, the results of wall movements from 3D FEM agree well with the instrumented data confirming that the modelling could reflect the real behavior of sheet pile walls at deep excavation in soft soils in Bangko