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Rekayasa Sipil
Published by Universitas Brawijaya
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 551 Documents
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MODELING OF SLUMP VALUE AND DETERMINATION OF INFLUENTIAL VARIABLES WITH REGRESSION APPROACH Eri Cahyani; Ari Wibowo; Indradi Wijatmiko
Rekayasa Sipil Vol 13, No 3 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.03.2

Abstract

There are many factors underlying the instability of the consistency of the concrete mixture. The consistency of the concrete mixture was measured using a slump test. Slump tests are commonly used in measuring the quality of fresh concrete. The instability of the slump value becomes an unsolved problem. To facilitate predicting slump values, modeling is needed to reduce variations in concrete job mixs. Regression has been known as the basic method of predictive modeling. Collected data is divided according to the ratio of sand to: <38%, 38-44% and> 44%. The sand ratio data <38% is the most suitable model, because it has a value of R2 0.957, adj. R2 0.897 and MSE 0.31. The most influential variable is water, retarder, gravel 20-30mm. The resulting modeling is adjusted to the range of data collected. 
ANALISIS SAMBUNGAN BAUT BALOK KOLOM RANGKA BAJA STRUKTURAL DENGAN PROFIL IWF MENGGUNAKAN PROGRAM BANTU ELEMEN HINGGA Machmud Budi Sulistiyo; Gati Annisa Hayu; Entin Hidayah
Rekayasa Sipil Vol 13, No 3 (2019)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2019.013.03.7

Abstract

Commonly joints problems (especially high strength bolt) were stiffness, ductility, and construction costs. This research was conducted with purpose to analyzed inner force and behavior that could be occurred on high strength bolted joints in steel frame using IWF profiles, such as stress, and reaction force-displacement. This study was divided into 2 step, first step was modeling on finite element software, and second step was analyzing the results and comparing it with the results from experimental study as validation base. In bolted joints model showed the best value on third trial with displacement value of 98,97 mm and reaction force of 41,57 KN. With validation to experimental results each one were 93,45% and 94,05%. Accuracy of hysteretic loop curve area was 98,46%.
The Utilization of Waste as Iron Ore in Making Concrete Aggregate Quality K.300 Rajiman Rajiman; Muhamad Amin; Harjianto Setiaji
Rekayasa Sipil Vol 14, No 1 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.01.2

Abstract

Concrete is an manmade building material that looks like stone. Concrete is a composite material consisting of coarse-grained material (aggregates or fillers) that is embedded in a solid matrix of material (cement or binder) that fills the space between the aggregate particles and glues them together. Concrete is used for road hardening, building structures, foundations, roads, bridges and the basis for fences.The method used in this research is study of literature. This research found that concrete using iron ore as an aggregate has a compressive strength higher than normal concrete that is equal to 38.90Mpa assuming greater size of iron ore as aggregate, the higher the Fe content, the size of escaped iron ore mesh aggregate 20, mesh 20 , mesh 5, 8-10 mesh and 10-12 mm mesh respectively 47,460%, 38,346%, 49,330%, 58,660% and 69,225%.
Akurasi Citra Data Foto Udara UAV Quadcopter Persimpangan Lalu Lintas Kota Kendari La Ode M. Nurrakhmad Arsyad; Statiswaty Statiswaty; Laode M. Iradat; M. Yamin; Try Sugiyarto
Rekayasa Sipil Vol 14, No 1 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.01.7

Abstract

The use of the Unnamed Aerial Vehicle (UAV) called “Drone” has been widely used in various areas of planning, one of them by mapping the highway traffic junction. The range of remote roaming, adjustable spatial resolution greatly gives flexibility in the effectiveness of field surveys. The mapping accuracy test conducted on 7 (seven) Unsignaling junction in Kendari City by Omisi and Komisi Equation method gives significant output and quite accurate to serve as further planning data. The difference between image and field measurement results, obtained accuracy of 96%, so that the use of UAV in supporting mapping, survey and field planning still prioritize effectiveness and accuracy of the measurement.
Ketahanan Beton fc’ 22,5 MPa Terhadap Kondisi Air Kota Palangka Raya Norseta Ajie Saputra; Noviyanthy Handayani
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.2

Abstract

Palangka Raya is a city where almost a part of the area is peatland with peat water with an acidity level of around 4.0 - 5.0 which can make concrete become porous and cause damage. This study is to determine the effect of peat water, Kahayan river water, and PDAM water on the compressive strength of concrete. In this study, the immersion of concrete samples was carried out for 28 days and 60 days. The measurement results are known that the pH of peat water is 4.0 while the pH of Kahayan river water and PDAM water is 5.0.From the results note that in the 28 days immersion, peat water concrete has increased in compressive strength while concrete in Kahayan river water and PDAM water has decreased in compressive strength. However, during the 60 days immersion the peat water concrete decreased in compressive strength to 20,638 MPa (17.31%). Whereas the Kahayan river water and PDAM water in the 60 days immersion experienced an increase in compressive strength values of 31,687 MPa (26.96%) and 27,696 MPa (10.98%). From these results, it can be concluded that the Kahayan river water with pH = 5.0 does not make the concrete lose its strength and can survive in an acidic environment.
Analisis Pengaruh Penyekatan Kanal Untuk Untuk Pembahasan Lahan Gambut Tropis Gina Khusnul Khotimah; Sigit Sutikno; Muhamad Yusa; Indradi Wijatmiko
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.7

Abstract

Peatlands rewetting for hydrological restoration plays an important role in fire prevention and peatland restoration of degraded peatland. One of the methods for the rewetting is canal blocking. The impact of canal blocking for peatland rewetting is further analyzed in this research. This study focused in Pulau Tebing Tinggi peatland hydrological unit (PHU), which is located in Kepulauan Meranti Regency, Riau Province. To analysis the rewetting impact, 15 dipwells were installed with the distance of 1 m, 51 m, 101 m, 201 and 301 m from the canal for each transect of the three transects. A transect was set in the downstream and two transects were set in the upstream of canal block. The ground water level (GWL) in the 15 dipwells was recorded using water-loggers for one year. This research found that canal blocking has a good effect on maintaining groundwater levels and keeping peatlands in always wet or humid conditions up to a distance of 201 m perpendicular to the canal if the rise in water level in the canal due to canal blocking is more than 0.6 m. It is able to maintain the ground water depth in peatlands around 0.4 m, where the peatlands become low risk to the fire, emission rates and subsidence.
Efisiensi Kapasitas Lentur Beton Pracetak (U-Ditch) Dengan Model Dinding Corrugated Erwin Syaiful Wagola; Muhammad Tharik Kemal
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.3

Abstract

This study discusses to analyze the flexural capacity and efficiency of the corrugated U-Ditch type with dimensions of 50x50 cm to the normal U-Ditch type. In this research using JIS (Japan International Standard) method for The U-Ditch Corrugated test. The results showed that the flexural behavior of the Normal Type U-Ditch is linear to collapse with a crack pattern occurring on the U-Ditch wall.  The bending of the U-Ditch Corrugated type tends to be linear until it collapses with a crack pattern occurring in the structural wall. The magnitude of the bending moment capacity for the normal type is 9.11 kN.m and capacity of the U-Ditch corrugated type is 8.05 kN. m where the efficiency of bending capacity is 98%.
Studi Eksperimental: Perilaku Siklik Anticompression Split-K Braced Steel Frame Oksa Eberly; Sri Murni Dewi; Wisnumurti Wisnumurti
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.9

Abstract

This paper presents an experimental study on the behaviour of a braced steel frame with a proposed system: anticompression brace system (ABS) subjected to cyclic lateral loads. The ABS is proposed to deal with common brace buckling problems. In the study, split-K braced steel frames: with ABS and with ordinary brace system (OBS) were used as speciments. Cyclic loading tests were conducted to evaluate the performance of the proposed system in preventing the brace to buckle and to obtain the behaviour of the frame with ABS compared to the frame with OBS under cyclic quasistatic loading. From the cyclic tests, it was observed that the proposed system worked in preventing the braces to buckle, hence, the aimed state, “buckling prevention” was achieved. The results of the study also show that the frame with ABS had a lower initial stiffness compared to the frame with OBS, nevertheless, after exceeding drift ratio of 0.85% based on raw data or 0.64% based on fitted-curves, the frame with ABS exhibited good behaviour through lower degradations in stiffness and cyclic strength relative to the frame with OBS that experienced sudden and greater degradations. 
Identifikasi Risiko Proyek Konstruksi Flyover dan Underpass di Indonesia(Kajian Literatur) Vederieq Yahya Enderzon
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.4

Abstract

Flyover and underpass are an important part of the road network system, especially to reduce congestion. These flyover and underpass construction projects have unique and very complex characteristics, so they face various types of risks that may occur during the project life cycle. Risks that occur can affect the cost, time and quality of construction projects, which in some cases can even have a serious impact on the sustainability of the project itself. Risk may occur due to several risk factors that cause it. Since the construction of flyover and underpass is very important and is a very strategic and usually large-scale project, a study of the types of risk factors that might occur during the construction of flyovers and underpass in Indonesia is needed. This research is dedicated to answering this problem. This study uses the literature review method for data collection. Based on the results of the study it was found that the risk of the conception stage is an obstacle in land acquisition, the planning stage is a change in design, the implementation stage is safety and safety.
Analisa Optimasi Diameter Jaringan Pipa Distribusi Air Bersih Dengan Menggunakan Software EPANET, LINGO di Jalur Sentul City PDAM Tirta Kahuripan Kabupaten Bogor Nuryani Nuryani; Budi Santosa
Rekayasa Sipil Vol 14, No 2 (2020)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2020.014.02.8

Abstract

One of the most important roles of water system supply is piping networking. Performance of water supply sistem service is determined not only by a capacity from the source, but also by water volume which must also be up to the vertices with high flow and adequate pressure as needed. Besides, the effectiveness of a pipline is measured from the cost of investment and operational cost over life of specified order. In order to achieve adequate pressure and flow conditions it must be analyzed the size carefully. Linear programming represents the completion of operations research techniques that can solve optimization problems. Linear prograsmming is used to minimize cost size of pipe. On this research, a sample informartion taken by a clean water distributin network in PDAM Tirta Khuripan, Bogor, West Java. By using the method of linear programing the result of optimization in PDAM Tirta Khuripan, Bogor, West Java diameter on each pipe  in with the selection of the main pipe diameter between 8 inch to 22 inch and pressure energy or relative energy is 2 metes into 7 metes by license set. 

Page 33 of 56 | Total Record : 551

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