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Rekayasa Sipil
Published by Universitas Brawijaya
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Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
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Articles 10 Documents
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Search results for , issue "Vol 12, No 2 (2018)" : 10 Documents clear
Studi Pasangan Bata Berdasarkan Produktivitas Jumlah Tenaga Kerja Dengan Metode Work Study Nico Hartono; M. Hamzah Hasyim; Saifoe El Unas
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.2

Abstract

Research on the comparative analysis of masonry unit price based on SNI and Work Study was conducted by the method of analysis SNI and analysis Work Research Study. The object of this study is a simple home construction project in Nurasa Regency Nganjuk. Calculation method using the coefficient existing SNI SNI Work Study while the calculation using the coefficient obtained through the research and the results shown in the method Work Study. After processing, the results obtained in the development. the method used is the analysis of ISO 6897-2008 with the number 6.9 to work 1 m2 couple red brick wall size (5 x 11 x 22) ½ cm thick brick, a mixture of species 1 PC: 4 PP. In the implementation of a method of the materials used are ISO methods but to the number of workers and working time adjusted to the field conditions where there may be differences between SNI and the field. The method of implementation in current research project is not in accordance with the SNI, because at the time of the field research used several different work groups. This certainly affects the cost of the implementation, where the number of different artisan or worker resulted in considerable cost difference anyway. In addition some of the things that makes the price to be much different and are beyond boundary problem should be eliminated in order to get the correct result - really can be compared with the SNI. Some things are omitted or overlooked include job preparation, work benangan, foreman, and the foreman. Budget plan masonry work per square meter according to SNI is USD 86,472.50. Budget plans masonry work costs per square meter with a method Work Study is USD 77,395.50. So the comparison difference masonry work cost per square meter between SNI and methods Work Study is Rp 9,076.50.
Pengaruh Penambahan Abu Ampas Tebu dan Kapur Terhadap Karakteristik Tanah Lempung Ekspansif (Studi Kasus : Tanah di Bojonegoro) Yanwar Eko Prasetyo; Yulvi Zaika; Arief Rachmansyah
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.7

Abstract

In each region having different types of soil, one type of soil is expansive clay. In Indonesia, more than 1/5 of the land area in Indonesia are an expansive clay. This type of soil will affected by changes in water content and experience significant shrinkage. Therefore, to improve the soil and minimize shrinkage growth, an effort is needed, one of which is soil stabilization. Physical testing of soil with soil samples in the district Ngasem, Kab. Bojonegoro which is expansive clay soil shows that the CBR value is 3.953%, and the swelling value is 6.1858%. With such physical conditions with low carrying capacity it is necessary to stabilize the soil on clay in Bojonegoro. Stabilization efforts carried out are by chemical stabilization by mixing soil samples with additives in the form of bagasse and lime ash. The results of the physical soil test from the preliminary research conducted by the author by mixing bagasse ash in the soil with variations in levels of 8%, 10%, 12%, 14% showed a mixture of 8% bagasse ash was the optimum level for repairs to the soil. So it is used a mixture of 8% bagasse ash with the addition of variations in lime content of 4%, 6% and 8% of the total weight of the mixture. A mixture of 8% bagasse ash and 6% lime content produced a CBR value of 9,324%, this CBR value increased to 135.87%. While the swelling value is 0.1681%, with the same mixture level. This swelling value decreased to 97.28%. For the value of free development it decreased to 217.7% from the previous one which amounted to 70.59% to 22.22%.
STUDI PENGARUH PENAMBAHAN SERABUT KELAPA TERHADAP KARAKTERISTIK MARSHALL PADA CAMPURAN ASPAL PORUS Syaviq, Muhammad Fahrus; Arifin, M. Zainul; Bowoputro, Hendi; Djakfar, Ludfi; Ambarwati, Lasmini
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.3

Abstract

Porous asphalt is a solution to avoid puddles on the road because it has a pore large enough to drain the surface water. However, porous asphalt has low stability, so it is necessary to improve the Marshall stability on a porous asphalt mixture. The purpose of this research is to know the optimum composition of the asphalt content, the coconut fiber content and the coconut fiber length and to determine whether or not there is an effect of adding coconut fiber to the Marshall properties on a porous asphalt mixture. In this study, the treatment used is by making porous asphalt mixture with a variation of the asphalt content of 4%, 5% and 6% and a variation of the coconut fiber content of 0.5%, 0.75% and 1% and a variation of the coconut fiber length of 2.5 mm 5 mm and 7.5 mm to determine the optimum composition of the porous asphalt mixture. The gradation standard used in this study is the Australian Asphalt Gradient Standard and for its specifications using the Marshall characteristics of the Australian Standard (AAPA). Using the response surface method, the optimum value for the asphalt content is 4% and the optimum value of the coconut fiber is 0.75%. The addition of coconut fiber was able to increase the MQ value by 119% from 112.56 kg / mm to 246.64 kg / mm and the stability value 61.56% from 388.32 kg to 627.38 kg. However, the addition of coconut fibers decrease the VIM rate by 18.6% from 20.27% to 18.6% and the flow value by 20% from 3.24 mm to 2.7 mm. These values meet the requirements of porous asphalt?s Marshall characteristics for Australian gradation standard. It is necessary to do a further research using other gradation standard.
Studi Analisis Struktur Living Quarter Pada Floating Production System di Perairan Lepas Pantai Indonesia Pramana, Dewa Ketut Surya; Nurlina, Siti; Waluyohadi, Indra; Hidayat, M. Taufik
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.8

Abstract

Offshore Unit is one of vital infrastructure in gas and oil production. There are many kind of offshore structure which use in gas and oil industry, one of it is a Floating Production System. Floating Production System is system where a modified tanker ship uses by the company of gas and oil to process hydrocarbon, nature gas, and oil. Technically FPS is a tanker ship that produce gas and oil nut can not storage directly while producting, that’s why there must be another storage ship while the tanker ship producing. In this living quarter structure analysis constitute on structure analysis in transportation condition. In this living quarter structure analysis utilize SAP2000 V.19 software which obtain bigest moment, shear, and axial from 8 different wave direction that accepted by the ship’s hull. Output software analysis and manual analysis shown that main steel structure of living quarter capable hold the loads that applied, which is structure load, dead and live load, wind load, and acceleration load.
Analisis Prediksi Kecelakaan Pengguna Sepeda di Kota Surabaya, Jawa Timur Rizky Apriastini; Rora Istidamatul Mahbubah; M. Zainul Arifin; A. Wicaksono
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.4

Abstract

The developing of infrastructure and residential areas have a relative impact on traffic. The increasing number of the volume of traffic is directly proportional to the increasing number of an accident.  Based on the data from Polda Jawa Timur, in 2014 namely 26 bicycle accidents and increased to 36 bicycle accidents in the year 2015, while in 2016 was decreased, namely to 24 bicycle accidents. To get a better understanding about bicycle accidnets, this study was conducted to know characteristic of traffic accident involving bicycle users in Surabaya. The method of analysis used is descriptive analysis frequency to find characteristic bicycle users involved accident and the characteristics of accidents involving bicycle users. Generalized linear model to make an accident prediction model that can happen on condition geometric and the traffic particular. Primary data consisting of the volume of traffic , speed and geometric conditions in the study locations. Secondary data obtained from related institution which is from Polda Jawa Timur, Bappeda Surabaya , and Dinas Perhubungan in Surabaya City. The analysis said that accident occurs has the majority of bicycle users involved accident in the city surabaya is man by 69,9% with age 15-20 year by 14,6 % and have a job as private sector workers. While characteristic of accidents involving bicycle users in the Surabaya is happening most in 06.00-11.59 WIB about 37,6 % with the double accident. Then the majority of injury was minor injuries at 38,2 % with a loss of < Rp. 200.000 at a good. An accident prediction model in Surabaya is McA = McA= 1,061  where: McA = number of accidents, Flow = traffic ( smp / hours ).
Pengaruh Void Ratio dan Permeabilitas Beton Terhadap Kuat Tekan Beton Porous dengan RCA Naila Mahdiana; Eva Arifi; Wisnumurti Wisnumurti; Ananda Insan Firdausy
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.9

Abstract

The infrastructure development raises the potential of old building destruction and demolition. This fact will results an environmental damage if construction waste is not being properly utilized. One type of construction waste that can be utilized is concrete waste. To apply sustainable development, concrete waste can be reused and recycled into aggregate in the form of RCA (Recycled Coarse Aggregate). Natural Coarse Aggregates (NCA) and RCA are processed into 0.5-1 cm, 1-2 cm, and 0.5-2 cm sizes and later mixed with cement paste into porous or pervious concrete. Porous concrete is a non-structural concrete which is water-permeable and has large pores. This study aims to determine the effect of RCA on the velue of concrete compressive strength, the most optimal concrete variation, and the influence of void ratio and permeability to the compressive strength of porous concrete. The result reported that RCA affects the compressive strength,, it can be proven that any variation of aggregate size, concrete variation with 0% RCA has the higher value than the 100% RCA one. The optimum concrete condition is in variation of 50% RCA at aggregate size 0.5-2 cm. The compressive strength value is 10.211 MPa. This is due to the more diverse aggregates affecting the concrete density. The larger the pores of the concrete (void ratio), the permeability value will be higher and the higher void ratio and permeability of concrete, the value of the compressive strength of porous concrete will be lower.
Analisis Probabilitas Keruntuhan Pada Lereng Tanah Residual Dengan Variasi Sudut Kemiringan Lereng Thiya Fianti; Eko Andi Suryo; Harimurti Harimurti
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.5

Abstract

Slope is (part of) the side of a hill or mountain. Slope stability became the main concern while working on a construction project, especially on road/highway project. Slope stability determined by soil parameters which include: physical & mechanical behavior of the soil, ground water level, rock mass structure, etc. Because there is an uncertainty on parameters value in the slope design, causing the slope vulnerable, it needs a concept such as probability analysis to find the stability of the slope. Probability analysis using Monte Carlo method involved a few parameters such as unit weight, cohesion and friction angle. Soil and Slope Geometry data were obtain from prior research. In this analysis there are three trials conducted with various slope angle along with similar material. The result will show a safety factor and failure probability percentage. From this analysis, it can be concluded that the steeper the slope, the lower safety factor number will be shown. The contrary result applied on probability of failure, the steeper the slope, the bigger probability of failure for soil material will occur.
Pengaruh Gempa Terhadap Perilaku Jembatan Cable Stayed Tengku Fisabililah Riau Dengan Time History Analysis Natalia Vin Kristin; Ari Wibowo; Desy Setyowulan; Edhi Wahyuni S.
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.10

Abstract

Tengku Fisabilillah Riau Bridge is one type of a cable stayed bridge that located in Indonesia. Indonesia is among one of the countries that are prone to earthquakes. Effects of earthquake can change the structure of the bridge. These effects can be analyzed using time history analysis.The first step begins with the modeling of bridge structures. But the dimensions and material specifications of the bridge’s structure has been determined by researcher. After modeling the structure of the bridge is completed, input the data of the time history. This data is taken from the earthquake of Hyogo-Ken Nanbu in Japan. Next, the changes of the structure of the bridge caused by the earthquake such as mode shapes, displacement, and stress that occur will be analyzed. Results of the analysis showed that there were many mode shapes generated, the largest mode shapes is on the Y-axis at the direction of the bridge. For displacement, the maximum displacement occurs direction in Z-axis. The deflection that caused by the earthquake is largest than the allowable maximum deflection of the bridge. While, the maximum stress occurs on the cable. The force which is caused by the earthquake is largest than the allowable maximum force owned section.
Analisis Debit Limpasan Drainase Akibat Pengaruh Perubahan Tata Guna Lahan Alifia Faradina; Indradi Wijatmiko; Yatnanta Padma Devia
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.1

Abstract

The drainage area of the secondary drainage system of the Gunungsari often occurs inundation or flood during rain. This is due to land use change, which was originally a water catchment area transformed into a densely populated area that resulted in disruption of soil absorption so that runoff becomes bigger. The analysis used in this thesis includes hydrological analysis, land use analysis, domestic discharge analysis, cumulative discharge analysis and hydraulics analysis. The hydrological analysis calculated the rainfall at return period of 2, 5, and 10 year with the Pearson Log distribution III, discharge calculation of the plan with the return period by means of the rational method and the method of coefficient value of land use (C) the land is then divided by the area of each sub das. The analysis of domestic waste was calculated from the total population prediction in the future and the water needs of the population. The cumulative discharge was total from domestic discharge and flood discharge of the return period of 2, 5, and 10 years. Hydraulic analysis was calculated to know the existing capacity of channel. The changing of land use were represented by average land use value ( Caverage ), which the value are 0,732; 0,725 and 0,747 for the year 2002; 2007 and 2017 respectively. Based on the results of flood discharge planning analysis, cumulative discharge in return periods of 10 years and hydraulic analysis, the flooding occurred at Darmo Indah channel (segment 5-2) by comparing capacity discharge 2,49 m3 / s and cumulative discharge 4,360 m3/s, Darmo Harapan channel (segment 4-5) by comparing capacity discharge 2,90 m3/s and cumulative discharge 4,496 m3/s. Darmo Satelit channel (segment 7-8) by comparing capacity drainage 4,08 m3/s and cumulative discharge 4,586 m3/s and Simo Gunung channel (segment 18-19) by comparing capacity drainage and cumulative discharge 1,31 m3/s and 2,648m3/s. The capacity of existing secondary channels is not able to accommodate cumulative water discharge over the next 10 years. Therefore, the solution to overcome the flooding is by substituting existing channel box culvert. On the other had, another way to prevent flooding are maintenance and cleaning of solid waste and sedimention regularly.
Evaluasi Kinerja Perbaikan Tanah Lunak Dengan Menggunakan Preloading dan Prefabricated Vertical Drain (PVD) Zahra Febrina Lilabsari; As&#039;ad Munawir; Yulvi Zaika; Arief Rachmansyah
Rekayasa Sipil Vol 12, No 2 (2018)
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.2018.012.02.6

Abstract

The settlement of soil consolidation is geotechnical problem which is often found in soft soil accumulation. It is therefore, Preloading and Prefabricated Vertical Drain techniques are used to accelerate consolidational settlement. The problem which often appeared in using Preloading and Prefabricated Vertical Drain (PVD) is the failure of design. It causes the consolidationtime cannot run in accordance with the planning. In order to have soil improvemet method which has high effectiveness it is necessary to evaluate the use of geotechnical instruments. In this study, the evaluation covers 3 (three) geotechnical instruments, where Settlement Plate is used to evaluate theoretical settlement, to calculate final settlement prediction with Asaoka observation method and consolidation degree in the field. Consolidation degree also can be evaluated using Pneumatic Piezometer instrument. The inclinometer is used to evaluated the stability of embankment. The failure of design in using Preloading and Prefabricated Vertical Drain (PVD) can be accured because of the mistake of planner in determaining soil design parameters, therefore this study also discusses soil design parameters in actual condition using back analysis method. The results obtained in this study are comparison of actual and theoretical settlement on average of 0.862. To predict final settlement it can be obtained the value 2191,08 mm with the rest of settlement which will be accured about 100 – 450 mm. In this study the actual consolidation degree from Piezometer reading is 85,36% and Settlement Plate reading is 88,42% with the difference of 3,06%. From Inclinometer reading lateral shift which is accured below the soil there is no land slide so that the embankment which is used remains safe The result of back analysis method is Ch value where the new Ch value is 1,914Cv.

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