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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 13, No 1 (2019)" : 10 Documents clear
ANALISA HIDROLOGI DAN HIDROLIKA PADA DAERAH ALIRAN SUNGAI (DAS) KALI PACAL BOJONEGORO Harjono, Harjono; Widhiastuti, Yulis
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.3

Abstract

Erosion and sedimentation are two interrelated problems. In the Pacal river catchment area, in its development there has been environmental damage which has caused problems in watershed management in the form of changes in the function of paddy fields which basically results in a decline in the amount of water demand. The aim of the study was to monitor and evaluate the performance of the Pacal River sub-watershed using water management criteria. The results of the study found that the Flood calculation for 5 years with the Harpes method with Debit yields of 443,678 m³ / sec, the Rational method produced 413,495 m³ / sec and the Melchoir method produced 412,824 m³ / sec.
PENGARUH VARIASI AGREGAT KASAR PENYUSUN BETON TERHADAP KERAPATAN BETON DENGAN MENGGUNAKAN PULSE VELOCITY PADA ALAT UPV (ULTRASONIC PULSE VELOCITY) Putri, Enggie Herma; Wijatmiko, Indradi; Budio, Sugeng Prayitno
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.8

Abstract

Concrete has already get through many developments, one of them is technological ones with mixture combination of various materials. Due to various materials, it is necessary to test the concrete. One of the test is a non-destructive test or test without damaging the test object with a device called Ultrasonic Pulse Velocity (UPV). This study aims to determine the relation between compressive strength and the concrete velocity produced by UPV test. This study analyze the velocity, which is obtained from UPV testing on cylindrical specimens with different variations of aggregate. There are 4 types of variation in this study,  fiber concrete, pumice concrete, porous concrete, and recycle concrete. In this study the relation between compressive strength and velocity produces coefficient of determination which is different on each variation of concrete.
ANOMALI HUJAN BENGAWAN SOLO HILIR 1979 – 2017 SERTA KETERKAITANNYA DENGAN EL NIÑO DAN LA NIÑA Heri Mulyanti; Ayu Kurnia Ratna Sari
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.4

Abstract

Rainfall anomaly associated with severe drought or flood. The research objective is to identified rainfall anomaly for 1979 – 2017 over Lower Bengawan Solo and its characteristic when El Nino or La Nina occur. Monthly data of 16 stasiuns used to analyze rainfall anomaly related to El Nino and La Nina. At specific years, it is found that wet anomaly occured 50% station (1989, 1995, 1998, and 1999). These years co-occurence with strong La Nina. Dry anomaly found at 1991, 1997, and 2002 which co-occurence with strong or moderate El Nino.
SUBTITUSI PARSIAL AGREGAT HALUS DENGAN BOTTOM ASH PADA PEMBUATAN BATA SEMEN Mufti Amir Sultan; Imran Imran; Rofika Sakti
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.9

Abstract

The Tidore Islands Municipal Steam Power Plant uses coal as fuel to generate electricity. Handling of coal waste in the Rum PLTU is done by storing it on empty land so that it is not effective because it can be potentially dangerous for the environment and surrounding communities. Therefore, it is important to use coal waste. One of them is in the construction field such as in the manufacture of cement bricks.The purpose of this study is to determine the level of water absorption and compressive strength of cement brick using bottom ash base material. Water absorption testing is carried out when the specimen has been immersed for 28 days. The test object is weighed in the SSD state and then inserted into the oven and left for 24 hours. Then the test object is left idle and then weighed. Testing of compressive strength was carried out when the specimen was 28 days old.The results of the study show that the absorption rate of cement brick is increasing when bottom ash is added.Meanwhile, for compressive strength, the cement brick has decreased
PENGARUH VARIASI AGREGAT KASAR PENYUSUN BETON TERHADAP KERAPATAN BETON DENGAN MENGGUNAKAN TRANSMISSION TIME PADA ALAT UPV (ULTRASONIC PULSE VELOCITY) Fatma Dora Indriani; Christin Remayanti Nainggolan; Ming Narto Wijaya
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.5

Abstract

To find out the quality of concrete, we need to test the concrete. Which is non destructive test  or testing without damaging the test object, namely with an UPV (Ultrasonic Pulse Velocity). In this study using 4 variations of coarse aggregate composition (mix design), namely porous variation, RCA (Recycled Coarse Aggregate) variation, pumice variation and fiber variation. The UPV test results in this study show that the relationship of compressive strength with amplitude (A1) or transmission time (t0) is concluded that the low homogeneity value causes higher energy loss so the amplitude value becomes lower and the value transmission time depends on the density of the concrete. In the value of compressive strength that affects homogeneity, it does not mean the higher the uniform material (homogeneity), the higher the compressive strength value.  Keywords: Amplitude, Concrete, Compressive Strength, Ultrasonic Pulse Velocity, Transmission Time
PENENTUAN DAERAH RAWAN KECELAKAAN DENGAN PENDEKATAN METODE JARINGAN SYARAF TIRUAN Annur Ma'ruf
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.10

Abstract

Technology improvement gives positive impacts on increasing transportation mode. But it has a negative impact such as traffic jam and increasing number in traffic accident, so road safety issues must be a common concern. One of the efforts to prevent tha accident is to identify accident-prone areas as a warning system for user. Eleven road sections in Malang District and supported data from Satkorlantas Polres Malang District is used as scope of discussion in this study. In this study, the factors that caused accidents such as road characteristic, geometric and environment condition is used for identifcation the accident-prone area. Based on the data, database mapping was done and the pattern of potential accident-prone areas was determined. It can be used for analysis and decision. Mapping and testing process uses a neural network approach because the accuracy of this method has been already proven in various applications. The results approach on prone area identification indicates a precision with a variance of 0.15% in compare with accident-based data analysis through the validation process. This result shows that neural network approach can be used to identify the accident-prone areas as one of the solution in accident prevention and efforts in road safety improvement.
ANALISIS PERUBAHAN KUANTITAS MATERIAL KOLOM BETON BERTULANG PADA MODEL STRUKTUR BANGUNAN GEDUNG SEDERHANA Mubarak Mubarak; Abdullah Abdullah; Medyan Riza; Yulia Hayati
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.1

Abstract

The loading aspect of a building is one of the factors that varies the dimensions of building components. Differences in building site areas are also contributed to the load received by buildings, especially in terms of earthquake loads. For the Province of Aceh with relatively high levels of earthquake vulnerability, the problems of structure dimensions change that caused by earthquake need to be specified. Changes to dimensions will affect the quantity of works, and furthermore against the building price standard. This research conducted to analyze the change of material quantity caused by earthquake load changes based on indication of acceleration of spectral response. This study was conducted by developing a model of simple building structure design and load change analyzed in 8 earthquake zones. The analysis focused specifically on the structural components of reinforced concrete columns. The information obtained from the analysis explains the effect of earthquake load changes from each of the observed zones on the use of reinforcing steel materials. The same condition is also seen in the ratio of reinforcement usage per cubic meter of concrete. The changes begin to be seen when the building model is positioned on zone 14 with an acceleration of 1.19g spectrum response.
PENGARUH PERKUATAN MORTAR JAKET DENGAN VARIASI KONFIGURASI TULANGAN LONGITUDINAL BAMBU PADA KOLOM BETON BERTULANG Nurmadinah Jasman; Christin Remayanti Nainggolan; Indradi Wijatmiko; Ari Wibowo
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.6

Abstract

Kolom merupakan salah satu struktur utama dari suatu bangunan. Kolom menjadi salah satu struktur dalam portal/frame yang menopang balok, seluruh beban lantai, serta beban lain yang diatasnya. Seiring perkembangan konstruksi kebutuhan akan peralihan fungsi bangunan sedang banyak dilakukan. Untuk menghindari terjadinya kolom lemah pada peralihan fungsi bangunan, diciptakan sebuah inovasi yaitu perbaikan dengan mortar jacketing. Pada penelitian ini digunakan kode kolom A5 – B5 dan A6 – B6. Yaitu, kolom retrofit kode A5 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 4 buah dengan ukuran 10 x 10 mm dibandingkan dengan kolom retrofit kode B5 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 8 buah dengan ukuran 10 x 5 mm dan dengan jarak tulangan transversal yang sama yaitu 7 cm. Sedangkan kolom retrofit dengan kode A6 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 4 buah dengan ukuran 10 x 10 mm, dibandingkan dengan kolom retrofit kode B6 adalah kolom retrofit yang menggunakan tulangan longitudinal bambu sebanyak 8 buah dengan ukuran 10 x 5 mm dan dengan jarak tulangan transversal yang sama yaitu 11 cm. Hasil akhir dari penelitian ini adalah efektifitas pengekangan kolom retrofit. Pengujian kolom dilakukan menggunakan mesin uji tekan untuk memperoleh nilai gaya tekan dan dial gauge untuk memperoleh nilai defleksi. Hasil penelitian antara variasi A5 dan B5 diperoleh bahwa variasi B5 memiliki efektifitas peningkatan gaya tekan maksimum yang lebih rendah sebesar 26,27% dibandingkan variasi A5. Hal ini karena rasio tekuk yang dimiliki kolom B5 lebih kecil dibandingkan kolom A5, sehingga tulangan longitudinal variasi A5 lebih efektif dalam menahan gaya tekan aksial. Selain itu nilai kekakuan dan modulus elastisitas dari kolom retrofit B5 juga memiliki nilai yang lebih kecil masing-masing  sebesar 61,17% dan 49,79% dibandingkan kolom retrofit A5. Namun untuk nilai peningkatan daktilitas variasi B5 memiliki nilai peningkatan daktilitas yang sedikit lebih besar sebesar 0,33% dibandingkan kolom retrofit A5. Maka disimpulkan bahwa kolom retrofit B5 lebih efektif dibandingkan kolom retrofit A5. Sedangkan untuk penelitian antara variasi A6 dan B6 diperoleh bahwa variasi B6 memiliki peningkatan gaya tekan maksimum yang lebih rendah sebesar 19,02% dibandingkan variasi A6. Namun variasi B6 memiliki nilai kekakuan dan modulus elastisitas yang lebih besar masing-masing  sebesar 1,82% dan 45,43% dibandingkan kolom A6, hal ini dapat saja terjadi karena proses pencampuran material saat pengecoran tidak merata, sehingga kuat tekan dan kekakuan serta modulus elastisitas tidak berbanding lurus. Sedangkan variasi B6 memiliki efektifitas peningkatan daktilitas lebih besar sebesar 62,33% dibandingkan variasi A6. Maka disimpulkan bahwa kolom retrofit B6 lebih efektif dibandingkan kolom retrofit A6. Oleh karena itu, pada penelitian ini konfigurasi tulangan memberikan pengaruh pada efektifitas perbaikan kolom.
PENGARUH REHABILITASI JARINGAN IRIGASI DAN KAPASITAS TAMPUNG WADUK TERHADAP KENAIKAN PRODUKTIVITAS TANAM DI DAERAH IRIGASI Gatot Eko Susilo
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.2

Abstract

Sebagian besar waduk dibangun untuk memenuhi kebutuhan air yang bersifat multiguna, artinya diperuntukkan untuk memenuhi berbagai kebutuhan air. Walaupun demikian kebutuhan air irigasi adalah kebutuhan air yang terbesar yang harus dipenuhi oleh waduk. Di seluruh dunia, kebutuhan air irigasi adalah sekitar 70% dari total air tawar dunia. Penelitian ini bertujuan menyelidiki kemampuan Waduk Way Rarem di Lampung Utara untuk memenuhi kebutuhan air di Daerah Irigasi Rarem dan menyelidiki pengaruh rehabilitasi jaringan irigasi terhadap kenaikan produktivitas tanam. Daerah Irigasi Rarem adalah daerah irigasi di Provinsi Lampung bagian Utara. Pada saat dibangun daerah irigasi ini direncanakan melayani sawah dengan luas baku 22.972 ha. Dari luas baku tersebut luas fungsi irigasi hanya mencapai 17.216 ha. Seiring berjalannya waktu, pada saat ini luas fungsional sawah menurun menjadi 15.081 ha akibat menurunnya efisiensi irigasi yang disebabkan oleh kerusakan saluran. Untuk meningkatkan hasil produksi pertanian Jaringan Irigasi Rarem akan direhabilitasi sehingga dapat melayani sawah seluas 19.264 ha.  Hasil penelitian menunjukkan bahwa produktivitas tanam optimal dengan luasan sawah 19.264 ha adalah 171%. Sedangkan rehabilitasi jaringan yang akan dilakukan akan berpotensi meningkatkan hasil panen sebesar 24.820 ton pertahun atau kenaikan sebesar 14,36% dari hasil produksi sekarang. Secara matematis, inflow Waduk Way Rarem tidak akan mampu untuk mengairi sawah dengan produktivitas tanam 200%. 
PENGARUH PERKUATAN MORTAR JAKET DENGAN VARIASI JARAK SENGKANG BAMBU PADA KOLOM BETON BERTULANG Muhammad Ainur Rofiq; Christin Remayanti Nainggolan; Ari Wibowo; Indradi Wijatmiko
Rekayasa Sipil Vol 13, No 1 (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.2019.013.01.7

Abstract

A building consists of several structural elements, one of them is a column that has the function to distribute the entire load of the building towards the foundation. If in the working process is done poorly, the column structure will fail. In addition, the structure of the building that has been established is sometimes not function appropriately based on the initial plan, so the load that works on the structure of the building can exceed limits that are previously calculated. Then, the reinforcement of the column is required to be functioned according to the previous planning. In this case, we use the retrofit column code A.5 and B.5 is a retrofit column that uses 4 pieces and 8 pieces of bamboo longitudinal with a size of 10 x 10 mm and 10 x 5 mm with a distance between 7 cm transversal reinforcement, compared to a retrofit column code A.6 and B.6 is a retrofit column that uses longitudinal reinforcement of bamboo as many as 4 pieces and 8 pieces with a size of 10 x 10 mm and 10 x 5 mm with a distance between transversal reinforcement 11 cm. The column was tested by using a compression test machine to obtain the value of the compressive force and dial gauge to obtain the deflection value. Testing of compressive strength was not carried out in the initial column, but only in the retrofit column. The results of the study between variations of A5 and A6 showed that variations in A5 had an increase in the maximum compressive force of 61.78% while variations in A6 increased by 59.86%, it is concluded that A5 was more effective than A6. Whereas for the research between variations of B5 and B6 it was found that variations in B5 had an increased maximum in compressive force of 48,51 %, it is concluded that B5 was more effective than B6.  

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