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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Journal of Enterprise and Development (JED) Makara Journal of Technology Aurelia: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Aceh International Journal of Science and Technology kawanad Jurnal Teknik Sipil Journal of The Civil Engineering Student
Mochammad Afifuddin
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering 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 Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Analisis Kuat Tekan Beton Mutu Tinggi Pasca Bakar Menggunakan Serat Polypropylene Aulia, Teuku Budi; Muttaqin, Muttaqin; Afifuddin, Mochammad; Amalia, Zahra
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 26, Nomor 1, JULI 2020
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1043.615 KB) | DOI: 10.14710/mkts.v26i1.28262

Abstract

High-strength concrete is vulnerable to high temperatures due to its high density. The use of polypropylene fibers could prevent structure explosion by forming canals due to melted fibers during fire, thus release its thermal stress. This study aims to determine the effect of polypropylene fibers on compressive strength of high-strength concrete after combustion at 400ºC for five hours. High-strength concrete was made by w/c-ratio 0.3 with cement amount 550 kg/m3 and added with silica fume 8% and superplasticizer 4% by cement weight. The variations of polypropylene fibers were 0%, 0.2% and 0.4% of concrete volume. The compression test was carried out on standard cylinders Ø15/30 cm of combustion and without combustion specimens at 7 and 28 days. The results showed that compressive strength of high-strength concretes without using polypropylene fibers decreased in post-combustion compared with specimens without combustion, i.e., 0.81% at 7 days and 23.42% at 28 days. Conversely, the use of polypropylene fibers can increase post-combustion compressive strength with a maximum value resulted in adding 0.2% which are 25.52% and 10.44% at 7 and 28 days respectively. It can be concluded that the use of polypropylene fibers is effective to prevent reduction of high-strength concrete compressive strength that are burned at high temperatures.
Apparent Porosity and Compressive Strength of Heat-Treated Clay/Iron Sand/Rice Husk Ash Composites over a Range of Sintering Temperatures Machmud, M. Nizar; Jalil, Zulkarnain; Afifuddin, Mochammad
Makara Journal of Technology Vol. 20, No. 2
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Novel composites of clay/iron sand/rice husk ash (RHA) have been developed. Electric furnace was used to perform heat treatment on the composites to study the effect of sintering temperature on their apparent porosity and compressive strength. Two types of RHA with different bulk density were prepared to gain an understanding of the influence of apparent porosity on compressive strength of the heat-treated composites over a range of sintering temperatures. Heattreated composites, made of clay/iron sand and clay/RHA, were also prepared as a referenced material. X-ray diffraction (XRD) analysis was further performed to comprehensively discuss the role of iron sand on apparent porosity and compressive strength of the heat-treated composites. The results show that the increase of sintering temperature reduces apparent porosity of the heat-treated composites. Reducing on the apparent porosity was then followed by the increase of compressive strength of the heat-treated composites. Compressive strength of the heat-treated composites was not sensitive to the sintering temperature up to 800 °C, and it would be more improved at the sintering temperature above 800 °C. This study concludes that such sintering temperature significantly improved apparent porosity and compressive strength of the composites due to use of iron sand.
The economic impact of asymmetric warfare through illicit drug trafficking in Indonesia Tatara, Beny Abukhaer; Suhirwan, Suhirwan; Afifuddin, Mochammad
Journal of Enterprise and Development (JED) Vol. 5 No. 1 (2023): Journal of Enterprise and Development (JED)
Publisher : Faculty of Islamic Economics and Business of Universitas Islam Negeri Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/jed.v5i1.6802

Abstract

Purpose — This research aims to analyze the economic impact of asymmetric warfare through illicit drug trafficking in Indonesia.Method — This research uses a qualitative method with data collection techniques using interviews and literature studies. Researchers conduct interviews with officials related to the National Narcotics Board with 10 people and officials from the Defense Potential Directorate of the Indonesian Ministry of Defense with 2 people.Result — Illicit drug trafficking in Indonesia has an impact on the national resilience of the Indonesian nation. The impact covers all aspects of astagatra, which consists of trigatra aspects, namely demographic, geographical, and natural resources aspects, and pancagatra aspects, which consist of ideological, political, economic, socio-cultural, and defense-security aspects. In economics, research has shown that the economic loss due to drugs amounts to 84.7 trillion rupiahs due to illicit drug trafficking, where 77.42 trillion rupiahs is a personal loss and 7.27 trillion rupiahs is a social cost. Moreover, drug addicts will find it difficult to get a job, given that the impact of rejection from the community and the work environment reaches 92%. Cooperation between agencies and community participation is necessary to address it. This is because Indonesia's defense system is total people's defense and security system (Sishankamrata), which requires the participation of all components of the nation.Contribution — This research add to the knowledge about the impact of asymmetric warfare through illicit drug trafficking, specifically the economic impact. In addition, this research is expected to be a source of input for the government in developing strategic steps to counter illicit drug trafficking which is asymmetric warfare.
Rancang Bangun Untuk Kontruksi Dinding Rumah dengan Bahan Bata Interlok Hayati, Yulia; Sabri; Aprilia, Cut; Malahayati, Nurul; Asyifa, Cut Nella; Munirwansyah; Afifuddin, Mochammad
Kawanad : Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 1 (2024): March
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/kjpkm.v3i1.208

Abstract

The type of material, mixture composition, and production process are among the factors that influence the strength of interlock bricks. In this study, interlocking bricks are used for the construction of residential wall structures. The interlocking brick mixture consists of cement, fly ash, sand, and water. The fly ash and sand used have a maximum diameter of 4.75 mm and are not subjected to calcination. Interlocking bricks measuring 30 cm x 20 cm x 10 cm are molded using a manual hydraulic press and cured for up to 28 days before being cut into test specimens measuring 5 cm x 5 cm x 5 cm. A total of 150 test specimens from 5 mix designs using water-cement ratios (WCR) of 0.3, 0.4, and 0.5 were utilized in this study. The objective of this research is to determine the quality levels of interlocking bricks based on compressive strength tests at 28 days of age. The quality levels are determined according to the Indonesian National Standard, SNI 03-0349-1989. Based on the compressive strength results, it was found that the average interlocking bricks with fly ash mixture achieved class III quality, indicating that they can only be used for non-structural wall applications.
Aplikasi Artificial Neural Network (ANN) pada Model Prediksi Kuat Tarik Belah Beton Busa Bakhtiar, Nur Hanif; Afifuddin, Mochammad; Fachrurrazi, Fachrurrazi
Journal of The Civil Engineering Student Vol 4, No 1 (2022): Volume 4 Nomor 1 April 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v4i1.17875

Abstract

Kuat tarik merupakan salah satu parameter untuk menentukan kekuatan beton. Perilaku beton didominasi oleh retakan akibat tarik dan perambatan tegangan tarik tidak dapat diabaikan. Artificial neural network (ANN) merupakan metode yang dapat memprediksi kuat tarik pada beton. Penelitian ini bertujuan untuk membuat model ANN yang dapat memprediksi kuat tarik belah beton busa. Pemodelan dilakukan menggunakan software MATLAB R2021a dan terdiri dari dua model ANN, yaitu model ANN – A yang merupakan pemodelan untuk beton busa tanpa tambahan aditif dan model ANN – B yang merupakan pemodelan untuk beton busa dengan tambahan aditif batu apung. Data yang digunakan merupakan data specific gravity, mix design dan kuat tarik belah beton busa yang diperoleh dari penelitian yang dilakukan di Laboratorium Konstruksi dan Bahan Bangunan, Jurusan Teknik Sipil, Universitas Syiah Kuala. Data dibagi menjadi 80% untuk training dan 20% untuk validasi. Hasil dari pemodelan ini menunjukkan ketepatan prediksi yang dilihat pada nilai mean absolute percentage error (MAPE). Nilai MAPE training pada model ANN – A dan B diperoleh sebesar 2,71% dan 1,43% sedangkan nilai MAPE validasi pada model ANN – A dan B diperoleh sebesar 9,72% dan 13,01%. Hasil penelitian menunjukkan model ANN yang dikembangkan dapat memprediksi nilai kuat tarik belah beton busa dengan tingkat ketepatan yang baik.
Evaluasi Perilaku Gedung Ikatan Alumni Universitas Syiah Kuala Dengan Time History Analysis Arisyi, Aldi; Afifuddin, Mochammad; Putra, Rudiansyah
Journal of The Civil Engineering Student Vol 5, No 1 (2023): Volume 5 Nomor 1 April 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v5i1.17873

Abstract

Provinsi Aceh merupakan salah satu daerah yang memiliki frekuensi terjadinya gempa bumi yang tinggi. Karena hal tersebut diperlukan perencaan gedung yang memenuhi standar terbaru seperti pada SNI-1726-2019 dan SNI-1727-2020. Penelitian ini bertujuan untuk mengetahui perilaku struktur gedung Ikatan Alumni Universitas Syiah Kuala menggunakan metode time history analysis dan bantuan software STERA 3D. Data yang digunakan berupa percepatan tanah lokasi gedung serta data masukan gempa berupa rekaman riwayat gempa El-Centro dan gempa Kobe. Hasil perhitungan menunjukkan bahwa nilai displacement dan nilai story drift ketika gedung tinjauan menerima beban gempa El-Centro dan gempa Kobe memenuhi syarat SNI-1726-2019 yaitu lebih kecil dari 2,5% h (tinggi). Untuk nilai base shear, semua jenis beban gempa yang diberikan juga memenuhi syarat SNI-1726-2019 yaitu harus lebih besar dari 984,59 kN. Dibagian akhir analisis dapat dilihat pengujian daktilitas, dimana dari semua beban gempa yang diberikan, gedung tinjauan mengalami kondisi pasca-elastik terbanyak ketika menerima beban gempa Kobe dibandingkan beban gempa El-Centro.
The Performance of Concentrically Braced Frames (CBF) in Chevron V Brace and Diagonal Configuration by Considering Various Frame Heights Panjaitan*, Arief; Hasibuan, Purwandy; Putra, Rudiansyah; Afifuddin, Mochammad; Haiqal, Muhammad; Adian, Fakhran; Naulia, Dwi Putroe; Hazid, Asraf
Aceh International Journal of Science and Technology Vol 12, No 2 (2023): August 2023
Publisher : Graduate School of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.2.30848

Abstract

Concentrically Braced Frame (CBF) is a structural system with high stiffness, so it is recommended to be implemented in earthquake-hazard areas. The stiffness in CBF is contributed by its diagonal component, which is called bracing. Bracing reduces lateral deformation on the frame system because of the earthquake and prevents heavy damage or failure of the structure. So far, several studies have been conducted. However, the effect of the frame height and the bracing configuration on the CBF performance has not yet been clarified. This study analytically investigated several models of CBF in Chevron V Brace and Diagonal configurations. Those models were prepared with different frame heights. The analyses were conducted by employing the cyclic load and considering yield displacement control in each model. The observation was emphasized on the load-displacement hysteresis curve, from which the performance of each model can be revealed. Three parameters of performance are evaluated: strength, stiffness, and dissipation energy. The analysis discovered that the Diagonal CBF performed better than the Chevron V Brace CBF by presenting a larger and more stable hysteresis curve, which is addressed to better energy dissipation. It is also discovered that reducing the frame height is suggested to enhance the CBF performance due to the earthquake.
Strategi Pemerintah Dalam Pencegahan Bioterorisme di Indonesia Harnanda, Marcellino Abel; Ramsi, Oktaheroe; Afifuddin, Mochammad
AURELIA: Jurnal Penelitian dan Pengabdian Masyarakat Indonesia Vol 4, No 1 (2025): January 2025
Publisher : CV. Rayyan Dwi Bharata

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57235/aurelia.v4i1.5429

Abstract

Bioterorisme merupakan ancaman yang dapat menimbulkan kerusakan besar terhadap kesehatan masyarakat, ekonomi, dan stabilitas negara. Sebagai negara dengan jumlah penduduk terbesar keempat di dunia, Indonesia dihadapkan pada tantangan besar dalam mencegah dan menangani ancaman bioterorisme. Penelitian ini bertujuan untuk menganalisis strategi pemerintah Indonesia dalam pencegahan bioterorisme melalui pendekatan kualitatif deskriptif-analisis. Teori yang digunakan dalam penelitian ini yaitu konsep bioterorisme, teori keamanan nasional dan Teori Keamanan Nasional dengan Pendekatan Intelijen dan Pengawasan. Pengumpulan data menggunakan tinjauan pustaka dengan menggunakan literatur terdahulu dan sumber-sumber lain di internet. Penelitian ini mencakup analisis tentang karakteristik teknik deteksi dini, serta kebijakan-kebijakan penanggulangan ataupun mitigasi yang harus diambil untuk meminimalkan dampak serangan bioterorisme. Penelitian ini diharapkan dapat berkontribusi pada pengembangan strategi global untuk melawan bioterorisme dan meningkatkan kesiapan dalam menghadapi potensi ancaman di masa sekarang dan masa depan.
Improved Performance on Inverted V Eccentrically Braced Frames (EBF) by Implementing Shear Link and Installing Web Stiffener in Link Panjaitan*, Arief; Hasibuan, Purwandy; Putra, Rudiansyah; Afifuddin, Mochammad; Bermansyah, Surya; Hasan, Muttaqin; Fauzi, Muhammad; Haiqal, Muhammad; Imran, Muhammad; Hanafi, Muhammad Fujii; Shimizu, Masaru
Aceh International Journal of Science and Technology Vol 14, No 1 (2025): April 2025
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.14.1.44305

Abstract

Eccentrically Braced Frame (EBF) is a structural system that is advised to be built in seismically active areas since they are characterized by good stiffness and ductility. A large and stable hysteretic curve, which corresponds to good seismic performance, is produced by the combination of improved stiffness and ductility in EBF. The diagonal component of EBF, known as a brace, contributes to its stiffness. Meanwhile, the short beam, also known as the link element, provides ductility in EBF. One element that is essential as an energy dissipator in EBF is a link element. By displaying a sizable and steady hysteretic curve, a prior study found that EBF with a flexural link could effectively dissipate the seismic energy. But to achieve a higher EBF, the seismic performance still needs to be enhanced. An analysis of various EBF models in Inverted V configurations was conducted in this paper. Each model was prepared with different shear link characteristics. Installing web stiffeners in the link to improve its seismic performance was also taken into consideration in this study. To obtain seismic performance, the cyclic loads were employed to each model under conditions of yield displacement control. Analysis of the data resulted in the load-displacement hysteretic curve. Next, using the hysteretic curve, the three seismic performance parameters, i.e., strength, stiffness, and dissipation energy were further developed. The investigation showed that compared to earlier studies, the EBF with shear links showed a bigger and more stable hysteretic curve which means better dissipated energy. Additionally, adding web stiffeners significantly increases the EBF's seismic capability. Therefore, because of the improved seismic characteristics, it is advised to establish the EBF using a shear link reinforced by web stiffeners in an earthquake-hazard area.
ANALISIS KAPASITAS BANGUNAN GEDUNG AKIBAT BEBAN GEMPA DENGAN METODE PUSH OVER ANALYSIS (Studi Kasus: Gedung Ikatan Keluarga Alumni Universitas Syiah Kuala) Taqwim, Muhammad Ahsani; Afifuddin, Mochammad; Asyifa, Cut Nella
Journal of The Civil Engineering Student Vol 7, No 2 (2025): Volume 7 Nomor 2 Juni 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v7i2.32223

Abstract

Indonesia merupakan negara dengan risiko tinggi terhadap gempa bumi, sehingga penting untuk merancang bangunan yang tahan gempa di wilayah ini. Analisis pushover adalah salah satu metode yang digunakan dalam desain struktur untuk mengukur kapasitas bangunan dalam menahan beban yang bekerja. Dalam penelitian ini, perangkat lunak SAP 2000 v.24 digunakan untuk menganalisis Gedung Ikatan Keluarga Alumni Universitas Syiah Kuala. Evaluasi kapasitas struktur melibatkan penilaian terhadap kekuatan, kekakuan, dan daktilitas bangunan untuk memastikan bahwa bangunan tersebut dapat tetap kokoh dan tidak mengalami kerusakan struktural yang signifikan selama dan setelah terjadinya gempa. Tujuan penelitian adalah untuk mengevaluasi kapasitas struktural gedung tersebut dan mengevaluasi output yang didapat. Gedung Ikatan Keluarga Alumni Universitas Syiah Kuala merupakan gedung bertingkat di wilayah kampus Universitas Syiah Kuala yang terdiri dari 3 lantai dengan tinggi 17,1 m dimana lebar gedung arah X adalah 37,94 m dan lebar arah Y adalah 30,00 m. Data Gedung Ikatan Keluarga Alumni Universitas Syiah Kuala diperoleh dari data DED (Detail Engineering Design) dan spesifikasi material. Metode yang digunakan adalah analisis pushover yang memberikan gambaran tentang kapasitas struktur dalam menahan beban dengan mensimulasikan respons struktur secara bertahap terhadap beban. Hasil penelitian menunjukkan evaluasi displacement yang didapat menunjukkan bahwa gedung aman terhadap perpindahan yang ditimbulkan oleh beban yang diberikan, dan simpangan antar lantai menunjukkan juga bahwa struktur masih dalam kategori memenuhi berdasarkan SNI 1726:2019 pada ketiga lantai gedung, begitupun dengan rasio kapasitas struktur masih dalam batas aman. Struktur bangunan mampu memberikan perilaku nonlinear dengan perbandingan beban pushover, gaya geser dalam arah X lebih besar dibandingkan dengan arah Y
Co-Authors Abdul Munir Abdullah Abdullah Adian, Fakhran Aldri Frinaldi Arisyi, Aldi Asyifa, Cut Nella Bakhtiar, Nur Hanif Bambang Wahyudi Cut Aprilia Effendi, Zulfan Fachrurrazi Fachrurrazi Hafnidar A. Rani Haiqal, Muhammad Hanafi, Muhammad Fujii Harnanda, Marcellino Abel Hasan, Muttaqin Hazid, Asraf Huzaim Huzaim Ismatullah, Aulia M. Nizar Machmud Muhammad Fauzi Muhammad Imran Munirwansyah Nafira, Dora Naulia, Dwi Putroe Nurul Malahayati Panjaitan*, Arief Panjaitan, Arief Purwandy Hasibuan, Purwandy Puspita, Fiany Fajar Ramsi, Oktaheroe Rudiansyah Putra Sabri Saputra, Farid Sari, Mutia Intan Shimizu, Masaru Suhirwan, Suhirwan Surya Bermansyah, Surya Taqwim, Muhammad Ahsani Tatara, Beny Abukhaer Teuku Budi Aulia Warmi, Anggi Yulia Hayati, Yulia Z, Rusli Zahra Amalia Zulkarnain Jalil