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INDONESIA
AGREGAT
Published by Universitas Muhammadiyah Surabaya
ISSN : 25412884     EISSN : 25410318     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
AGREGAT is a journal of Department of Civil Engineering, University of Muhammadiyah Surabaya. The journal will be published in every May and November yearly. The journal consists of result of research, literature review, and case reports created as realization of Tridharma college.
Arjuna Subject : -
Articles 240 Documents
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Manajemen Resiko Lingkungan Pada Proyek Gedung Sekolah Zulfiar, Muhammad Heri; Syah, Sultan Agung Muhammad
AGREGAT Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v10i1.26324

Abstract

Pembangunan di Indonesia meningkat seiring meningkatnya jumlah dan kebutuhan penduduk. Terdapat banyak resiko yang terjadi selama pembangunan proyek salah satunya resiko yang terjadi pada lingkungan. Semakin besar skala proyek yang dikerjakan maka berbanding lurus dengan resiko yang dihadapi. Untuk mengatasi dan meminimalisir resiko tersebut maka diperlukan penilaian dan pengendalian pada proyek tersebut. Dalam penelitian ini dilakukan pengumpulan data dengan metode kuisioner yang diberikan kepada pihak yang terlibat pada pembangunan gedung sekolah di Bantul. Adapun data tersebut kemudian diolah dengan mengacu pada matriks resiko. Berdasarkan hasil analisis yang dilakukan, pelaksanaan prosedur pengendalian resiko lingkungan telah dilaksanakan dengan baik. Kesimpulan dari penelitian ini terdapat empat kategori pekerjaan yang diperoleh nilai sebesar 4,1 dengan kategori resiko rendah. Kemudian pada pekerjaan persiapan memperoleh angka sebesar 4,09 dengan kategori resiko tingkat rendah. Pada pekerjaan penggalian sebesar 5,00 dengan kategori resiko tingkat rendah. Pada pekerjaan pengaturan lalu lintas sebesar 3,19 dengan kategori resiko tingkat rendah. Pada pekerjaan struktur sebesar 4,12 dengan kategori resiko tingkat rendah.
Kajian Daya Dukung Tata Air sebagai Upaya Perencanaan Pengelolaan Daerah Aliran Sungai (DAS) yang Berkelanjutan (Studi Kasus pada DAS Dodokan, NTB, Indonesia) Muhammad Khalis, Ilmi; Swahip, Swahip; Hidayat, Ari Ramadhan; Fibriyanti, Baiq Vina
AGREGAT Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v10i1.26401

Abstract

Monitoring and Evaluation (M&E) of Watershed (DAS) Performance is crucial to assess the Carrying Capacity of the Watershed and can subsequently serve as feedback for improving future watershed management planning. The study on the carrying capacity of water management in the Dodokan Watershed (DAS) is conducted as part of the M&E of watershed performance, considering that the Dodokan Watershed is one of the four main watersheds on Lombok Island, which plays a strategic role due to its high utility in water supply. This study aims to assess the performance of the Dodokan Watershed by measuring its carrying capacity using several parameters, including Flow Regime Coefficient (KRA), Flood Occurrence Frequency (FKB), Water Use Index (IPA), Annual Flow Coefficient (KAT), Sediment Load (MS), and Environmental Flow (EF). Each parameter will be assigned a score and categorized based on the Minister of Forestry Regulation No. P.61/Menhut-II/2014 regarding Monitoring and Evaluation of Watershed Management. The results of the study show that the carrying capacity of the Dodokan Watershed tends to fluctuate but is generally in the moderate category. Overall, the carrying capacity value of the Dodokan Watershed is 95, with an average value of 105, which places the watershed in the moderate carrying capacity category (90 < DDD < 110). Therefore, sustainable watershed management is necessary, with a focus on reducing KRA, MS, and FKB values, as well as increasing KAT, IPA, and EF values. Recommended efforts include the implementation of soil and water conservation techniques for the maintenance of catchment areas, as well as vegetation management for biodiversity conservation and land rehabilitation.
Evaluasi Desain Struktur Gedung Pengadilan Agama Sendawar Terhadap Beban Gempa Handayani, Noviyanthy; Pramadi Atmajaya; Ridho Saleh Silaban
AGREGAT Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v10i1.26500

Abstract

Pulau Kalimantan saat ini memiliki risiko gempa yang lebih rendah dibandingkan dengan pulau-pulau lain di Indonesia karena jaraknya yang lebih jauh dari titik pertemuan lempeng tektonik. Meskipun demikian, terdapat beberapa sesar aktif yang dapat menyebabkan gempa sewaktu-waktu. Oleh karena itu, penting untuk merencanakan struktur bangunan yang mampu bertahanselama dan setelah gempa. Gedung Pengadilan Agama Sendawar, yang baru dibangun di Kutai Barat, Kalimantan Timur, berada di zona gempa 1, bersebelahan dengan zona gempa 2, namun tidak dirancang dengan beban gempa. Karena itulah penelitian ini dilaksanakan untuk mengevaluasi kembali struktur gedung tersebut menggunakan beban gempa yang sesuai dengan SNI-03-1726-2019. Tahapan penelitian meliputi persiapan, pengumpulan data sekunder, analisis data menggunakan perangkat lunak SAP2000 dan validasi dengan ETABS, serta penyajian hasil dan pembahasan. Analisis menggunakan beban gempa dinamis respons spektrum zona gempa 1 dan zona gempa 2 mencakup cek partisipasi massa, perbandingan gaya geser statis dan dinamis, simpangan antar lantai, dan cek kekuatan penampang. Hasil penelitian menunjukkan bahwa tidak ada perubahan signifikan pada gaya normal, lintang, dan momen maksimal antara zona non-gempa, zona gempa 1, dan zona gempa 2. Struktur berada dalam batas aman terhadap beban gempa zona 1 dan zona 2, tanpa overstress. Namun, penampang struktur dapat terkategori boros atau kurang efisien
Analisis Potensi Penambahan Kapur Tohor Dan Variasi Difa Soil Stabilizer Terhadap Stabilisasi Tanah Lempung Saputra, Norseta Ajie Saputra; Rizkan Maulidi Ansyari; Amelia Faradila
AGREGAT Vol 10 No 1 (2025)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v10i1.26506

Abstract

PT. Bisma Dharma Kencana Kecamatan Tewang Sanggalang Garing, Kabupaten Katingan Hilir merupakan salah satu perkebunan kelapa sawit yang cukup besar. Permasalahan muncul diakibatkan kondisi jalan perusahaan yang sering dilewati masyarakat memiliki karakteristik tanah yang kurang baik dan mudah rusak apabila terjadi hujan yang cukup sering. Parameter nilai California Bearing Ratio (CBR) yang rendah dan indeks plastisitas yang cukup tinggi dapat menjadi alasan atas apa yang terjadi.   Kondisi ini menunjukkan bahwa tanah tersebut tidak memenuhi persyaratan sebagai lapisan perkerasan jalan, sehingga diperlukan upaya stabilisasi untuk meningkatkan daya dukungnya. Penelitian ini menggunakan metode stabilisasi kimiawi dengan penambahan bahan aditif Difa Soil Stabilizer dan kapur tohor. Tujuan dari penelitian ini adalah untuk mengevaluasi efektivitas bahan stabilisasi dalam memperbaiki sifat fisik dan mekanik tanah, terutama terhadap parameter batas Atterberg, kepadatan, dan nilai CBR. Hasil pengujian menunjukkan bahwa nilai indeks plastisitas tanah asli sebesar 22,05% mengalami penurunan secara signifikan setelah penambahan bahan stabilisasi. Penurunan indeks plastisitas terjadi pada variasi TD1 hingga TD4 masing-masing menjadi 13,00%;  12,78% ; 12,13% dan 11,94%. Peningkatan signifikan juga terjadi pada nilai CBR. Tanah asli yang memiliki nilai CBR sebesar 4,28% mengalami peningkatan setelah dicampur dengan kapur tohor dan variasi Difa Soil Stabilizer sebesar 0%, 1%, 2%, dan 3% yang masing-masing menghasilkan nilai CBR sebesar 10,45%; 11,59%; 12,35%; dan puncaknya sebesar 30,40%. Hasil ini menunjukkan bahwa kombinasi penggunaa kapur tohor dan Difa Soil Stabilizer mampu meningkatkan stabilitas tanah lempung secara signifikan, sehingga layak dijadikan alternatif solusi untuk perbaikan tanah dasar pada konstruksi jalan
PENERAPAN METODE MODIFIKASI ANDERSEN DALAM PENILAIAN RISIKO BENDUNGAN HALIWEN: ANDERSEN MODIFICATION METHOD APPLICATION IN HALIWEN DAM RISK ASSESSMENT Maulana, Muhammad Fuad; Sukamta; Dyah Ari Wulandari
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.20450

Abstract

Indonesia is a disaster-prone country; therefore, all infrastructure must be risk-analyzed in order to carry out mitigation efforts. One of the infrastructures that holds the potential for high risk of danger is a dam. Dams need to be inspected regarding dam operations, maintenance, and safety, one of which is through regular inspections. The results of the inspection can be used to analyze dam risks. The Haliwen Dam was originally a reservoir whose classification was upgraded to dam due to the enactment of Minister of Public Works Regulation No. 27 of 2015 concerning Dams. The Haliwen Dam needs to be analyzed for its risks as a dam. The method for analyzing the risk of dams can use the modified Andersen method. This method works well for dams with limited information during construction and instrumentation. This research requires a report on the results of field inspections to determine the physical condition of the dam. The end result of this analysis is the dam risk condition in the form of a safety value (Naman). The safety value obtained is 80. Based on the risk assessment of the modified Andersen method, the Haliwen Dam has a safety value above 75 (satisfactory), which means that the dam is in good condition and has a low risk of failure. A satisfactory safety value means that the dam can operate properly at ordinary (normal) and extraordinary load times.
Nur Puspita Sari: Analisis Kenaikan Nilai California Bearing Ratio (CBR) Laboratorium Tanah Lunak Dengan Penambahan Masker Medis Puspita, sari; Sarie, Fatma; Ikhwan Yani, M.
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21020

Abstract

Limbah masker yang sulit didaur ulang secara alami menjadikan masalah bagi lingkungan. Masker memiliki sifat terluar menolak air, bagian tengah bersifat menahan virus, dan paling dalam bersifat menyerap air. Serat pada umumnya banyak digunakan untuk bahan stabilisasi tanah. Stabilisasi tanah dilakukan apabila tanah tersebut memiliki daya dukung yang buruk. namun sebelum dilakukannya stabilisasi tanah maka perlu adanya analisis tanah asli. Oleh karena itu penelitian ini bertujuan untuk menganalisis sifat fisik dan karakteristik tanah lunak, menganalisis nilai California Bearing Ratio (CBR) tanah lunak asli, dan menganalisis nilai CBR tanah lunak setelah diberikan bahan tambah masker medis.Tanah yang dianalisis merupakan tanah lunak yang berasal dari salah satu Desa Gambah Luar Muka, Kecamatan Kandangan, Kabupaten Hulu Sungai Selatan. Analisis dilakukan pada Laboratorium Mekanika Tanah, Jurusan Teknik Sipil, Fakultas Teknik, Universitas Palangka Raya untuk pengujian sifat fisik dan sifat mekanik tanah. Berdasarkan Hasil pengujian sifat-sifat fisik tanah asli didapat nilai, kadar air (w) = 37,26%; berat isi tanah (g)= 2,05 g/cm3; berat jenis (Gs) = 2,64; batas cair = 37,44%; Batas plastis = 33,87%; Indeks plastisitas = 3,57% ; batas susut = 7,79%; analisis saringan persentase lolos saringan no. 200 = 58,33%; Menurut sistem klasifikasi USCS tanah tersebut termasuk sebagai tanah ML yaitu tanah lanau tak organik; sedangkan menurut sistem klasifikasi AASHTO tanah diklasifikasikan sebagai tanah berlanau dalam kelompok A-4(2). nilai pemadatan laboratorium, untuk sampel tanah asli didapat OMC = 22,86%, dan gdmax = 1,58 g/cm3 dan untuk nilai CBRrencana tanah asli adalah 2,55%. Pada campuran masker medis 1,5% nilai CBR naik menjadi 3,82% meningkat sebesar 50,20% dari tanah asli, pada campuran masker medis 1,75% nilai CBR naik menjadi 5,56% meningkat sebesar 118,04% dari tanah asli, dan pada campuran masker medis 2% nilai CBR naik menjadi 8,40% meningkat 229,41% dari tanah asli pada masa pemeraman 3 hari.
ANALISIS DAMPAK LALU LINTAS AKIBAT AKTIFITAS PADA KAWASAN PASAR TURI BARU SURABAYA Hapsari, Yunita Tri; Sholichin, Ibnu; Estikhamah, Fithri
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21282

Abstract

The increase in road traffic has caused traffic jams in the market area of New Turi Surabaya. The traffic jams on this street were caused by visitors' exits to the Surabaya New Turi Market. In this study on traffic impact analysis was carried out to find out the performance of bridges, side obstacles, level of service in the area of New Turi Market Surabaya. This study uses the intersection method guided by the 2014 Indonesian Road Capacity Guidelines (PKJI) on Traffic Signalling Tool Abnormalities. (APILL). This research was conducted for a week in busy hours. From the results of the calculation of traffic performance, obtained the saturation degree (DJ) Highway Dupak by 0.91, Market Road Turi by 0,93, Tembaan Road by 0.89, Semarang Road by 0.091. Whereas for saturation degrees (dJ) with APILL in the conditions of existing Road Dupak By 0.93 and the average delay (T) = 36.96 seconds/skr, Market Street Turi was 0.92 and the mean delay(T) was 49.76 seconds/sk, Tembaan Street was 0.89 and the medium delay was (T)) = 40.34 seconds/kr, Semarang Street was (0.93 and average delays(T)) was (49.02 seconds/sek). The highest saturation degree (DJ) is 0.93 with the level of service (LOS) E, because the area belongs to the crowded and center of market activity and the density of traffic flows.
Analisis Korelasi Kerusakan Bangunan Terhadap Tingkat Kepuasan Pengguna Dengan Metode Customer Satisfaction Index (Studi Kasus Gedung F Universitas DR. Soetomo Surabaya) Nikmatus Sa'adah; Rizki Astri A; Wisnu Abiarto N
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21829

Abstract

Since the construction of building F, Dr. University. Soetomo Surabaya has not experienced any changes either in terms of form or other points of view. Based on observations of the current condition of the building, there is still not enough attention and the age of the building already requires care, maintenance and repair of damage. Building quality greatly influences building user satisfaction because good building quality can make users feel comfortable in the building. The aim of this research is to analyze damaged items, analyze the level of user satisfaction and analyze poor building conditions. The method used in this research is a quantitative method where data collection was carried out by distributing a questionnaire survey via Google Form to 135 respondents consisting of lecturers at the Faculty of Engineering and students using building F, Dr. University. Soetomo Surabaya, apart from distributing questionnaires, this research was carried out by direct observation. This research uses the customer satisfaction index method which aims to determine the level of satisfaction of building users and uses the help of Smart-PLS software to help process data generated from questionnaires by testing its validity and reliability. The results of this research showed several damages, including damage to columns, beams, floor plates, walls, finishing, glass and door frames, floors and ceilings. The damage in this study refers to the classification of building damage according to (PUPR, 2021) where overall damage to walls is categorized as very light damage, damage to columns is categorized as moderate damage, damage to beams is categorized as heavy damage, damage to floor slabs is categorized as heavy damage. , damage to the floor is categorized as light damage, damage to the ceiling is categorized as moderate damage, and for finishing it is categorized as heavy damage due to complete finishing damage. The research results on the level of user satisfaction with building conditions using the customer satisfaction index (CSI) method were 55.41%, which means building users are quite satisfied with the current condition of the building. Apart from that, the results of the condition of the building, according to the respondent's point of view, which were not good were damage to the color of the wall paint, condition of the ceiling, door and window accessories, doors and windows, door and window frames, walls. Keywords: Building Damage, User Satisfaction, Customer Satisfaction Index, Smart-PLS
Evaluasi Sistem Perpipaan Plambing Gedung Asrama Mahasiswa ITS Surabaya Agustina, Nuria; Nurul Jannah Asid; Rizki Astri A
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21929

Abstract

ITS Surabaya Student Dormitory Building uses PDAM clean water services and is also equipped with a fire extinguishing installation whose distribution network system uses clean water. As students' needs increase, their need for clean water will also increase. And because of this, this building often experiences problems distributing clean water during peak usage hours due to simultaneous use, there is a decrease in the flow of each unit of piping equipment due to uneven installation of the clean water distribution system. Therefore, the distribution system in pipes requires special handling which often experiences problems in terms of quantity, pressure and continuity of water. The aim of this research is to analyze the magnitude of energy loss in the plumbing pipe network in the ITS Surabaya Dormitory Building, and also to analyze the causes of closed pipes experiencing energy loss. At which point the energy loss is highest, so is the remaining energy at the last pipeline node. The method used in this research is a quantitative method by analyzing the condition of the existing pipe network in clean water installations and fire extinguishing installations in terms of pipe dimensions, pipe length and reservoir elevation which will then be carried out by running tests with the program to find out how much The large energy losses that occur in plumbing pipe networks are assisted by a simulation program using Epanet 2.2. From the results of this research, there are several conclusions that the results of the analysis of the Clean Water pipe network of the ITS Surabaya Student Dormitory Building for clean water installations have the highest velocity (Velocity) of 0.2 m/s in pipe 15 on the 1st Floor, and the sprinkler pipe has a velocity (Velocity). ). ) the highest is 0.08 m/s on pipe 01 Floor 2. There are still many pipes whose speed is less than 0.1 m/s, which means the pipe speed in the network does not meet the design criteria. And for the pressure of the clean water pipe network and sprinklers at all node points with a value of ≥0.5 bar (according to planning standards). Based on the results of running unit headloss, the clean water pipe network and sprinklers have a value of <10 m/Km (according to planning standards) and no pipes experience negative pressure or pressure drop.    
Pengaruh Penggunaan Baja Ringan Hollow Berisi Mortar Sebagai Pengganti Baja Tulangan Terhadap Kuat Lentur Balok Saputra, Elvis; Rakha Citra Permana Adinata
AGREGAT Vol 9 No 1 (2024)
Publisher : Universitas Muhammadiyah Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30651/ag.v9i1.21973

Abstract

The significant development in Indonesia has led to an increase in the demand for construction materials. One crucial material in building structures is reinforced concrete. Reinforced concrete is a composite material of concrete and steel reinforcement. Steel reinforcement plays a vital role in resisting tensile forces. However, reinforced concrete has a primary weakness, namely, its low tensile strength, which affects the weight of concrete and the overall strength of the building structure. To address this issue, several studies have been conducted to develop lightweight reinforced concrete without compromising its functionality and strength. One innovation introduced is the use of lightweight steel as a replacement for conventional steel reinforcement due to its lower weight. This research aims to investigate the effect of using lightweight steel filled with mortar as a substitute for conventional steel reinforcement on flexural strength. The testing method involves two-point loading and measuring deflection using LVDT on the test specimens. The results of the study show that the comparison between experimental and theoretical nominal moments indicates a minor difference. The experimental nominal moment of lightweight steel reinforced beams increases by 1.84 kNm or 18.91% compared to conventional steel reinforced beams. However, the maximum deflection in lightweight steel reinforced beams is smaller by 23% or 5.9 mm. These results suggest that using lightweight steel can increase the nominal moment while producing smaller deflections.

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