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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur International Journal of Science and Engineering (IJSE) TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL JURNAL KARYA TEKNIK SIPIL Rekayasa Sipil Journal of Regional and City Planning Jurnal Teknik Sipil Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Teras Jurnal Potensi : Jurnal Sipil Politeknik Civil Engineering Dimension JTERA (Jurnal Teknologi Rekayasa) SIKLUS: Jurnal Teknik Sipil Journal of Architectural Design and Urbanism Jambura Journal of Electrical and Electronics Engineering JOURNAL OF INFORMATION SYSTEM RESEARCH (JOSH) Jurnal Sisfotek Global Journal of Economic, Business and Engineering (JEBE)
Nuroji Nuroji
Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Semarang
Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation

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Finite Element Analysis of The Effect of Fiber Content on The Flexural Strength of SFRC Beams with Steel Rebars Ilham Nurhuda; Blinka Hernawan Prasetya; Nuroji Nuroji; Yulita Arni Priastiwi
Civil Engineering Dimension Vol. 26 No. 2 (2024): SEPTEMBER 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.26.2.101-110

Abstract

This research aimed at studying the effect of fiber content on the flexural strength and behavior of steel fiber reinforced concrete (SFRC) beams with steel rebars. The study employed finite element (FE) analysis to simulate the behavior of SFRC beams. The simulation results of the FE model were validated against experimental data. Subsequently, the validated model was utilized to analyze the strength and crack patterns of SFRC beams with steel rebars in comparison to conventional RC concrete beams without fibers. The parametric study indicates an average 9% increase in RC beam capacity for every 1% increment in fiber volume fraction. Moreover, this study reveals more substantial effects of steel fibers on beams with low reinforcement ratios. Crack analysis shows that cracks in the SFRC beams are distributed more evenly compared to plain RC beams at regions with the same bending moment, indicating enhanced strength to sustain loads, reduced deflection, and improved beam ductility.
Decision Support System Model for College Kartu Indonesia Pintar (KIP) Scholarship Recipients Using the C4.5 Decision Tree Method and Simple Additive Weighting (SAW) Hadi, Nofiar; Rizkiawan, M. Asep; Moedjiono, Moedjiono; Nuroji, Nuroji
JURNAL SISFOTEK GLOBAL Vol 14, No 2 (2024): JURNAL SISFOTEK GLOBAL
Publisher : Institut Teknologi dan Bisnis Bina Sarana Global

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38101/sisfotek.v14i2.14395

Abstract

The KIP-Kuliah Scholarship is an Indonesian government program that is used to help high school students (SMA) or equivalent who are less capable but have academic potential in financing education in college. In this study, the problem limitation or scope of research is at Prof. DR. HAMKA Muhammadiyah University College in the Management Study Program. In each year the selection of scholarship acceptance often changes criteria, because of the frequent changes in scholarship criteria each year users often experience problems in selecting KIP-Kuliah scholarship recipients. Decision Support System (SPK) is a solution to assist in decision making. The purpose of this research is to assist in decision making in determining scholarship recipients in accordance with existing criteria. The method used in this research is using Decision Tree C4.5 to determine the weight of the KIP-Kuliah scholarship criteria and the Simple Additive Weighting (SAW) method is used to determine the ranking of scholarship recipients. In this study, researchers used 3 criteria, namely the amount of parents' income, the number of dependents, and the interview test scores. The results of the analysis of the calculations using the Decision Tree C4.5 and Simple Additive Weighting (SAW) methods and the results of the selection of college KIP scholarships consisting of the criteria for the amount of parents' income, the number of dependents and the interview test, the 12 students who deserve college KIP scholarships are students who get the highest preference scores, namely M11, M3, M6, M4, M14, M1, M5, M12, M10, M2, M7, and M9. In conclusion, the use of a Decision Support System with the Decision Tree C4.5 and Simple Additive Weighting (SAW) methods is effective in helping determine the recipients of the KIP-Kuliah scholarship in accordance with predetermined criteria.
Pemanfaatan Batu Pumice Dalam Mengurangi Penurunan Performa Beton Pasca Kebakaran Thoyfurrohman, Muhammad Akhis; Cahyo, Bagas Indra; Yulianti, Erika; Nuroji, Nuroji; Priastiwi, Yulita Arni
Teras Jurnal : Jurnal Teknik Sipil Vol. 12 No. 1 (2022): Volume 12 Nomor 1, Maret 2022
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v12i1.569

Abstract

Abstrak Beton yang mengalami kebakaran pada suhu 400ËšC akan mengalami degradasi kekuatan hingga kuat tekan sisa 58,40% Hal ini akan mempengaruhi kualitas/kekuatan struktur beton tersebut dan akan menyebabkan beton menjadi getas, dan memungkinkan struktur mengalami kegagalan. Diperlukan upaya proteksi pasif kebakaran dengan menggunakan material yang memiliki ketahanan terhadap api. Salah satu material yang memiliki ketahanan terhadap api yang baik adalah batu pumice. Penelitian ini bertujuan untuk mengetahui nilai kuat tekan dan laju penurunan kekuatan beton pumice yang menggunakan Pasir Muntilan sebagai agregat halus akibat perubahan suhu pembakaran pada 27°C, 300°C, dan 600°C. Penelitian menggunakan 45 buah benda uji silinder beton berukuran diameter 15 cm dan tinggi 30 cm. Dengan variasi penggantian batu pumice 0% , 25%, 50%, 75% dan 100% dari volume agregat kasar dan Faktor Air Semen (FAS) sebesar 0,5. Pengujian kuat tekan dengan alat compression saat umur 28 hari. Hasil penelitian ini menunjukkan bahwa suhu pembakaran mempengaruhi kuat tekan beton pumice dengan pasir Muntilan pada semua komposisi proporsi. Semakin tinggi suhu pembakaran maka semakin besar penurunan yang terjadi. Besaran penurunan kuat tekan akibat kenaikan suhu pembakaran berkisar antara 0,16% hingga 55,38% lebih lambat dibandingkan dengan beton tanpa menggunakan batu pumice Kata kunci: Beton, Batu Pumice, Performa Beton  Abstract Concrete that has been burned at 400° C will experience degradation to a residual compressive strength of 58.40%. This will affect the strength of the concrete structure and will cause the concrete to become brittle, thus allowing the structure to fail. Then it will require passive fire protection by using materials that have some resistance to the fire. One material that has the potential to create fire resistance is pumice stone. The purpose of this study was to determine the value of compressive strength and the rate of reduction in compressive strength of Muntilan sand pumice concrete due to the changes in combustion temperature of 27ËšC,300ËšC, and 600ËšC. In this study, used a 45 pieces concrete cylinder with a diameter of 15 cm and a height of 30 cm. with variations of pumice stone proportion of 0%, 25%, 50%,75% and 100% of the volume of coarse aggregate with a water cement ratio of 0.5. Compressive strength test with a compression device at the age of 28 days. The results of this study indicate that the combustion temperature affects the compressive strength of pumice concrete. The higher the combustion temperature, the higher the strength reduction that occurs. The amount of reduction in compressive strength due to an increase in combustion temperature ranged from 0.16% to 55.38% of the control specimens. Keywords: Pumice, Compressive Strength, Temperature
Data Center Room Monitoring Based on Temperature and Humidity with Internet of Things Rizkiawan, M. Asep; Ramza, Harry; Nuroji, Nuroji; Sofwan, Agus
Jambura Journal of Electrical and Electronics Engineering Vol 6, No 2 (2024): Juli - Desember 2024
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v6i2.23344

Abstract

The idea of the Internet of Things (IoT) encompasses the application of technologies such as sensors and software to an object for the purpose of communicating, controlling, connecting, and exchanging data with other devices while connected to the Internet. In this study, the IoT concept developed was used to monitor and regulate conditions within the data center. The development method used is the life cycle method of system development. The development process involved modifying the Arduino Uno with an esp8266 microcontroller and a DHT-22 sensor to detect temperature and humidity in real time. The testing of IoT development was done using the black box and white box methods. Research results show that the prototyped IoT network can operate well and successfully improve data center performance. In addition, users can also access the system through websites and mobile applications to facilitate the monitoring process.
Sistem Monitoring Volume Sampah Medis Berdasarkan Ketinggian Menggunakan Sensor Ultrasonik Berbasis IoT dengan Notifikasi Telegram Ramdani, Fauzi; Nuroji, Nuroji
Journal of Information System Research (JOSH) Vol 7 No 2 (2026): January 2026
Publisher : Forum Kerjasama Pendidikan Tinggi (FKPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47065/josh.v7i2.9236

Abstract

This research aims to develop an Internet of Things (IoT)-based medical waste height monitoring system as an effort to overcome the problem of manual medical waste monitoring in small-scale health facilities. This condition has the potential to cause delays in waste transportation, thereby increasing health risks and environmental pollution. The developed system utilizes a NodeMCU ESP8266 microcontroller as the main control unit, an HC-SR04 ultrasonic sensor to measure the height of medical waste piles, and a 16x2 I2C LCD as a real-time information display medium. If the waste height reaches a predetermined limit, the system automatically sends a warning notification via the Telegram application. The research method used is Research and Development (R&D) with an experimental approach that includes the stages of problem identification, system design, implementation, and tool testing. The test results show that the ultrasonic sensor has an accuracy level of 98% with an average error difference of ±2 cm, and the Telegram notification delivery time is less than 5 seconds after the threshold is reached. The contribution of this research lies in the design and implementation of a simple, real-time, and easy-to-implement IoT-based medical waste volume monitoring system, so that it can support safer, more effective, and more responsive medical waste management in small-scale health facilities.
KINERJA SAMBUNGAN MEKANIS JENIS COUPLING SLEEVE AKIBAT BEBAN MONOTONIK Riyanto, Eko Riyanto; Nuroji, Nuroji; Priastiwi, Yulita Arni Priastiwi
Journal of Economic, Business and Engineering (JEBE) Vol. 7 No. 2 (2026): April
Publisher : Universitas Sains Al Qur'an

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32500/jebe.v7i2.11027

Abstract

Sambungan tulangan merupakan elemen penting dalam konstruksi bangunan beton bertulang. Salah satu alasan penggunaan sambungan tulangan adalah ketersediaan tulangan yang diproduksi memiliki keterbatasan panjang. Penyambungan tulangan dapat dilakukan dengan tiga cara, yaitu sambungan lewatan, sambungan las, dan sambungan mekanis. Penelitian ini diusulkan inovasi model sambungan mekanis berupa sistem coupling sleeve yaitu sambungan dua batang tulangan dengan selongsong berbentuk silinder yang mempunyai sayap terpisah berlubang dengan fungsi sebagai wadah untuk menancapkan baut pengencang. Penelitian bertujuan menganalisis inovasi model sambungan mekanis dengan tidak adanya eksentrisitas, serta meningkatkan efisiensi panjang sambungan, tanpa mengurangi luas penampang pada batang yang disambung. Metode penelitian pengujian sambungan mekanis berdasarkan ASTM A1034-10a yaitu metode uji tarik untuk mengevaluasi kinerja sambungan mekanis pada batang tulangan baja dengan memvariasikan panjang dan diameter coupler yang digunakan. Sebelum pengujian eksperimental di laboratorium, terlebih dahulu dilakukan simulasi menggunakan perangkat lunak ANSYS untuk menentukan panjang sambungan mekanis yang optimum dalam menahan beban serta mengetahui konsentrasi tegangan yang terjadi pada benda uji. Hasil penelitian bahwa penggunaan coupling sleeve dengan panjang 200 mm memberikan kinerja yang paling optimal dibandingkan variasi panjang lainnya. Distribusi tegangan maksimum pada sistem sambungan terjadi pada daerah baut akibat pengaruh gaya tarik dan torsi pengencangan, sedangkan tegangan pada tulangan dan selongsong relatif lebih merata. Selain itu, hasil simulasi menunjukkan bahwa gaya penjepit dari baut mampu meningkatkan gaya cengkeram selongsong terhadap tulangan sehingga transfer gaya tarik dapat berlangsung secara efektif tanpa terjadi slip. Dengan demikian, sistem coupling sleeve yang dikembangkan berpotensi menjadi alternatif sambungan mekanis yang efisien dan aplikatif pada konstruksi beton bertulang.
Daya Tahan Mortar Geopolimer dan Mortar Semen Portland Pozzolan (PPC) terhadap Larutan Asam Sulfat Nurhuda, S.T., M.T., Ph.D., Ilham; Priastiwi, Yulita Arni; Nuroji, Nuroji; Ardidawa, Variandi; Nizami, Chazaidhan AlFahd
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 2 (2022)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v28i2.46324

Abstract

Penggunaan semen dalam beton sering dikritik karena pembuatan semen menghasilkan emisi CO2 yang tinggi ke lingkungan. Pengurangan semen dalam konstruksi atau mengganti semen dengan material lain yang lebih ramah lingkungan diyakini dapat menjadi solusi untuk lingkungan yang lebih baik. Semen portland pozzolan (PPC) dikenal sebagai semen yang lebih ramah lingkungan yang menggantikan sebagian klinker semen dengan bahan pozzolan seperti fly ash. Bahan ramah lingkungan lainnya adalah geopolimer yang sepenuhnya menggantikan semen dengan bahan pozzolan. Tujuan penelitian ini adalah untuk mengetahui durabilitas mortar berbahan PPC dan geopolimer pada lingkungan korosif. Mortar geopolimer terbuat dari fly ash dengan substitusi tanah putih 25%, serta aktivator NaOH 8M dan Na2SiO3. Kondisi korosi disimulasikan dengan larutan Asam Sulfat (H2SO4) dengan pH 4. Durabilitas mortar diamati pada umur perendaman 14, 28, 56, dan 100 hari. Keawetan kedua jenis mortar diperiksa dengan menguji kuat tekan, kuat tarik langsung, porositas, densitas dan mengamati perubahan massa dan bentuk  fisik setelah perendaman. Hasil penelitian menunjukkan bahwa perendaman mortar dalam larutan Asam Sulfat pH 4 tidak berpengaruh besar terhadap kinerja mortar PPC. Namun, kinerja mortar geopolimer dengan substitusi tanah putih 25% menurun setelah direndam dalam larutan asam sulfat. 
Pengekang Crossties di Zona Tekan Balok dengan Pembebanan Siklik Priastiwi, Yulita Arni; Imran, Iswandi; Nuroji, Nuroji; Hidayat, Arif
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 2, (2018)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (973.852 KB) | DOI: 10.14710/mkts.v24i2.18980

Abstract

Crossties that was installed as a confinement in the compression zone of the beam is proven can increase the ductility, especially when receiving the earthquake load. Using an experimental study, this paper  explains  the effect of crossties which was installed in compression zone of the beam. The model was a simplification of the plastic hinge of the beam. The beam was enlarged in the center of the span and would be loaded with a cyclic of point load, so as to produced the largest moment and shear fields in the face beam of the column. Moreover, the loading was provided by the displacement control system to achieve the ultimate condition. The results show that the crossties significantly increases the displacement and curvature ductility of the beams of 58.7% and 78.2%, respectively, compared to the beam without confinement. In addition, the load cycle formed by cyclic loading increases to 43 cycles in beam with crossties, meanwhile the beam without confinement can only survive up to 33 cycles. The crossties could also increase the cumulative value of inelastic displacement that occurs up to 98%, whereas its  energy dissipation value is six times than the beam without confinement. On the other hand, the maximum load and capacity moment only increase about 6.5%.
Co-Authors Adhyta Narendra Winarno Afdholi Afdholi Aktorina, Wahyu Alfred Nobel Pakpaham Andika Yudha P Antonius Antonius Ardidawa, Variandi Aria Wirawan Aries Susanty Arif Hidayat Asshidiqie, Muhammad Rony Ay Lie Han Bagus Hario Setiadji Bambang Riyanto Bambang Riyanto Bernard Bayu Baskoro Blinka Hernawan Prasetya Bobby Rio Indriyantho Budi Wicaksono Cahyo, Bagas Indra Daniel Erlanda David Mulyawan Prayogo Dea Nika Alvianti Gagoek Hardiman Hadi Wibowo Hadi, Nofiar Han Ay Lie Hardi Wibowo Hery Suliantoro Himawan Indarto Ilham Nurhuda Ilham Nurhuda Iswandi Imran Jumani Arso Livian Teddy M Agung Wibowo M. Asep Rizkiawan Mardani Rizki Anggoro Moedjiono Moedjiono Mohamad Sahari Besari Mohamad Sahari Besari, Mohamad Sahari Monica Devi Muhammad Amin Cakrawijaya Muhammad Amin Cakrawijaya Nicolaus Iyowau Nizami, Chazaidhan AlFahd Novia Puspitarini, Novia Nurhuda, S.T., M.T., Ph.D., Ilham Priastiwi, Yulita Arni Priastiwi Purwanto Purwanto Putra, Ryan Dwiyana Rahma Nindya Ayu Hapsari ramdani, fauzi Ramza, Harry Rangga Maulana Riyanto, Eko Riyanto Rohman, Muhamad Arif Rudi Yuniarto Adi Sahari Besari Sie Alexander Patrick Subagyo Sofwan, Agus Sri Rejeki Laku Utami Sri Tudjono Sri Tudjono Sukamta Sukamta Sumardi . Sumirin Sumirin Sumirin Sumirin Supriyadi Supriyadi Thoyfurrohman, Muhammad Akhis Ujang Ruslan Vanessa Nurmalita Windu Partono Windu Partono Wirajati Ramadhianto, Wirajati Yulianti, Erika Yulita Arni Priastiwi