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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
 29   30   31   32   33 
ANALISIS POTENSI TINGKAT BENCANA BANJIR DAERAH ALIRAN SUNGAI WAY KURIPAN KOTA BANDAR LAMPUNG Ayudia Hardiyani Kiranaratri; Nirmawana Simarmata; Denny Hidayat
Rekayasa Sipil Vol 13, No 2 (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.2019.013.02.10

Abstract

Floods are always a problem, especially in residential areas. This is in line with the development of people's lives. The Way Kuripan River is a river that passes through several villages in the city of Bandar Lampung, which often overflows into community settlements if the rainy season arrives, especially in the Pesawahan, Kuripan and Karang Cities which are downstream from the river. Therefore, it is necessary to have an analysis to find out the river water level that passes through an area if the rainy season arrives whether or not it can be accommodated by the river body or not. Based on the survey in the field, it is known that the width of the Way Kuripan River is found in the Betung Hills, West Tanjung Karang District, which is 20 m and the depth of the river is 4.51 m. if the rainy season arrives, the upper reaches of the Way Kuripan River have a water level that is 0.5 m - 3.0793 m so that the depth of the river is still able to be accommodated by different river bodies with downstream rivers in Pesawahan and Karang Cities where due to sedimentation the depth of the river is only 2.78 m and the width of the river is 10 m, while during the rainy season the river water level reaches 0.5 - 5,216 m. so that the water that passes through is unable to be accommodated in the river body and overflows in the area.
STUDI EVALUASI PENGARUH VARIASI MUTU BETON TERHADAP KEKUATAN STRUKTUR BETON NORMAL MENGGUNAKAN METODE NON-DESTRUCTIVE TEST DAN DESTRUCTIVE TEST Bagas Bhanu Aribawa; Indradi Wijatmiko; Roland Martin Simatupang
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.2019.013.03.5

Abstract

To make the examination of the strength of existing building structures easier, can be done by using the Non-Destructive Test (NDT) methods, but the results obtained are not as accurate as using the Destructive Test (DT) method. It is therefore a study related to the combination of NDT and DT methods to obtain better accuracy of the results. The research uses PUNDIT PL-200, Silver Schmidt Hammer, Compression Testing Machine with 3 concrete quality types of 12,5 MPa, 18,75 MPa, and 25 MPa. Overall results, UPV and the actual compressive strength have a close and mutually affecting relationship between the variables evidenced by the R2 value of 0,7458. In addition, with the presence of combinations of several variables testing methods of DT and NDT, it can produce a level of accuracy from a compressive strength estimate value.  
PENGARUH VARIASI MUTU BETON PADA BENDA UJI BALOK BETON NORMAL DENGAN MENGGUNAKAN METODE NON DESTRUCTIVE TEST Kushariyanto Kushariyanto; Christin Remayanti Nainggolan; Siti Nurlina
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.2019.013.03.10

Abstract

This research aims to know the relationship of the pulse velocity to compression strength with a variation of the quality of the concrete based on the ultrasonic pulse velocity. This research uses the PUNDIT PL-200 to do the process of analysis of concrete density based on the pulse velocity from the UPV. From UPV testing in this research showed that each quality and each method has a strong connection of the same compression strength and velocity. This is indicated by rising the velocity graph as the quality of the concrete itself increases. From this research also gained comparisons between the three methods, which is between direct and semi-direct methods, direct and indirect methods, as well as semi-direct and indirect methods.
Pengaruh Campuran Terhadap Kuat Tekan Beton Agregat Recycle Sulaiman, Lusman; Fisu, Amiruddin Akbar
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.2020.014.01.5

Abstract

High consumption of freshwater and natural aggregate in concrete production becomes a matter of some concern that has been discussed recent years. An alternative partially or totally replacement for both materials is significant issue to reduce the negative impacts on the environment. Therefore, the aim of this research is to observe explicitly the effect of using seawater as mixing combined with recycled coarse aggregate and other materials to make new recycled aggregate concrete (RAC) under compressive load. The experimental laboratory test was conducted to total of thirty cylinders specimens of two to groups of mix design with w/c of 0.45. First was three types of percentage level of recycled coarse aggregate with targeted compressive strength of 25 MPa. The second was two types of mixtures and totally replaced by recycled coarse aggregate with targeted compressive strength of 30 MPa. Some specimens were mixed by seawater and all were placed in the freshwater-curing during some definite period of 7 and 28 days. The results show that the seawater and recycle aggregate were not significant influence to reduce the compression strength for first mix category, while the second mix category was having great influence up to 22% at 28 day. The reduction in compressive strength increases with an increase the targeted compressive load.
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.
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.
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.
MODEL ESTIMASI RISIKO PADA PROYEK INFRASTRUKTUR SKEMA KERJASAMA PEMERINTAH DAN SWASTA DENGAN PENDEKATAN FUZZY-DELPHI Moch Husnullah Pangeran
Rekayasa Sipil Vol 13, No 2 (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.2019.013.02.1

Abstract

The development of infrastructure under public-private partnerships (PPP) schemes is perceived having a relatively high level of risk. Its referring to the scale of investment which requires generated income to be spread over a long time of concession period. Hence, the success of PPP in infrastructure development can not be separated from the appropriate risks allocation to the involved parties that best able to bear the risks. As one of the key steps in risk management process, risk assessment will provides the profile of the risks identified more depth and specific, then allocated to the parties as the mechanism of risks response. This study develops a model based on fuzzy-delphi approach to facilitate a structured subjective judgement of risks in a PPP infrastructure project. The model was tested by taking the case study of 15 identified major risks in water supply project under PPP concession scheme in Indonesia. The testing and evaluation of the proposed model involves a number of officials and staff from related central government agencies as respondents. By applying Fuzzy-Delphi technique, the probability and impact value of 15 major risks were assessed and quantified. Criteria used for model evaluation are comprehensiveness, clarity, ability to apply in real projects, contribution to the better decision, and overall satisfaction. Evaluation result indicated that the developed model is acceptable according to appreciation and approvals from the respondents representing the parties that are most interested with the model implementation in the future.
ANALISIS RESOURCE LEVELING SUMBER DAYA ALAT MENGGUNAKAN METODE BURGESS Candra Yuliana; Retna Hapsari Kartadipura; Satria Wijaya
Rekayasa Sipil Vol 13, No 2 (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.2019.013.02.6

Abstract

Dalam mengalokasikan sumber daya diperlukan logika saling ketergantungan antar kegiatan dalam suatu proyek konstruksi. Semakin banyak kegiatan atau pekerjaan yang terdapat dalam suatu proyek maka semakin rumit pula pengalokasian sumber daya tersebut. Karena kerumitan tersebut, maka alokasi sumber daya yang direncanakan tidak terdistribusi secara ideal sehingga mengakibatkan alokasi sumber daya yang bersifat tidak tetap. Penelitian dilakukan pada dua proyek jalan yaitu pada proyek Jalan Kiram-Simpang 3 Tahura-Mandiangin dan Jalan Gunung Kupang-Kiram-Tambang Ulang, dengan pembahasan khusus pada sumber daya alat. Pemanfaatan alat berat pada suatu proyek konstruksi dapat memberi insentif pada efisiensi dan efektifitas pada tahap pelaksanaan maupun hasil yang dicapai maka  diperlukan upaya penelitian dengan menerapkan perataan sumber daya (resource leveling) peralatan menggunakan metode burgess terhadap dua proyek sekaligus. Setelah dilakukan resource leveling pada aktifitas-aktifitas non kritis ,penggunaan alat dan biaya langsung perminggu lebih stabil. Penundaan sebanyak 4 minggu pada pekerjaan pasangan batu dengan mortar pada proyek 2, dan penundaan sebanyak 7 minggu pada pekerjaan pasangan batu dengan mortar pada proyek 1.

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