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Hasan, Muttaqin
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The Impact of Fiber Density and Layering in NFRP on Confined Concrete Compressive Strength Amalia, Zahra; Saidi, Taufiq; Hasan, Muttaqin; Al-Bakri, Nazira Suha; Fu, Li
Journal of the Civil Engineering Forum Vol. 10 No. 2 (May 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.10408

Abstract

Strengthening columns holds a crucial role in structural engineering and is frequently called for due to a range of factors, including heightened load requirements, structural degradation, design flaws, or the need for seismic retrofitting. Natural Fiber-Reinforced Polymers (NFRP) in concrete reinforcement has gained significant attention in recent years as a sustainable and eco-friendly alternative to strengthened reinforced concrete. NFRP jacketing presents an adaptable option, as it delivers an improved load-carrying capability as a confining effect. This paper explores the fundamental reasons behind the need for column strengthening and the advantages of employing NFRP jacketing as a preferred method. The study examined the influence of varying fiber densities and the number of fiber layers in NFRP on the mechanical properties of concrete, with a specific focus on its confined concrete compressive strength. The test specimen was a cylinder with a diameter of 150mm and a height of 300mm. NFRP, made from abaca fiber and resin, was attached around the specimen’s circumference to provide a confinement effect. Axial load was applied to the test specimen. The findings indicated that introducing abaca fiber as an NFRP material increased confined concrete compressive strength by up to 37% compared to unconfined concrete. Moreover, the application of three layers of NFRP fibers results in a 15% rise in confined concrete stress, especially when higher-density fiber types are utilized. Study findings suggest that natural fiber density and the number of layers play a role in enhancing concrete strength, however, their influence may not be significantly pronounced.
Long-term Monitoring of Low-cost Seismometers: Consistency Analysis of The Instrument Juellyan, Juellyan; Setiawan, Bambang; Hasan, Muttaqin; Achmad, Ashfa; Yulianur, Alfiansyah; Saidi, Taufiq
Aceh International Journal of Science and Technology Vol 13, No 1 (2024): April 2024
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.13.1.38248

Abstract

Instruments have become an essential part of conducting a study or research. With the aid of instruments, the measurement process can be faster, more efficient, and more accurate. However, an instrument also has a limited service life. Over time, the performance of the instrument will degrade. Therefore, the equipment must be regularly maintained and calibrated periodically. This research aims to test the measurement consistency of a low-cost seismometer (RS-3D). The approach involves long-term measurements to assess the instrument's stability in taking measurements. The measurement data is then processed and presented as frequencies using spectrum analysis. The research findings indicate that the instrument's consistency is generally good, with an average standard deviation of 0.18 and a coefficient of variation of 5%. Additionally, 95% confidence interval calculations yielded values of 2.520.02 for measurements at RKD, 3.040.05 for measurements at GLT-USK, and 3.30.04 for measurements at GFT-USK. Data validation was performed using the equations from building codes, showing that the difference between the measured microtremor frequency and the empirical equation was less than 1, indicating good measurement results. The conclusion drawn from this study is that a higher standard deviation value indicates a more distributed data spread, signifying less consistent research data. Conversely, a lower standard deviation indicates that the data is more concentrated around the mean value, indicating more consistent measurement results. Moreover, with previous studies having conducted validation and consistency testing, it is hoped that both tests will be routinely performed during instrument maintenance.
Efek Korosi Baja Tulangan Terhadap Kinerja Struktur Tipikal Pertokoan di Banda Aceh Habibie, Muhammad; Hasan, Muttaqin; Fonna, Syarizal
Al Qalam: Jurnal Ilmiah Keagamaan dan Kemasyarakatan Vol. 17, No 4 : Al Qalam (Juli 2023)
Publisher : Sekolah Tinggi Ilmu Al-Qur'an (STIQ) Amuntai Kalimantan Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35931/aq.v17i4.2364

Abstract

Korosi umumnya merugikan materi dan mengakibatkan korban jiwa apabila terjadi pada bangunan yang dijadikan sebagai pusat kegiatan manusia. Bangunan pertokoan Gampong Merduati merupakan salah satu bangunan terdampak korosi akibat air tsunami yang terjadi pada 2004 silam. Penelitian ini bertujuan untuk mengetahui pengaruh korosi baja tulangan terhadap kinerja struktur bangunan dengan melakukan assessment lapangan. Mutu beton diuji menggunakan hammer test dan tingkat korosi digunakan potential mapping. Struktur bangunan dibuat dua model yaitu model kondisi awal dan kondisi eksisting kemudian dihitung strukturnya dengan software SAP2000. Metode pembebanan digunakan metode push over kemudian dilakukan analisis apakah perlu dilakukan perkuatan struktur terhadap elemen beton bertulang. Hasil penelitian menunjukkan keseluruhan retak yang terjadi mempengaruhi kapasitas struktur bangunan tetapi beban yang bekerja masih dalam batas izin kapasitas struktur yang tersedia, korosi kolom K1 (30x30 cm) lantai I dan pada balok BL1 (30/50 cm) lantai II berada pada level korosi tinggi, hasil analisis pushover menunjukkan kapasitas dan kekakuan sruktur kondisi awal lebih besar daripada kondisi eksisting, level kinerja struktur berada pada level Immediate Occupancy, secara struktur kolom lantai I tidak memerlukan perkuatan dimana kolom masih mempunyai kekuatan tersedia lebih besar daripada kekuatan perlu tetapi secara korosi perlu diberikan epoxy resin agar korosi yang terjadi tidak semakin parah.
Studi Kerentanan Struktur Bangunan Bertingkat Tinggi Akibat Gempa Di Kota Banda Aceh abdi, aufar; Hasan, Muttaqin; Saidi, Taufiq; Hayati, Yulia
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.v4i1.17733

Abstract

Gempa bumi adalah fenomena alam berupa getaran yang terjadi di permukaan bumi akibat pelepasan energi dari dalam secara tiba-tiba yang menciptakan gelombang seismic yang dapat mengakibat kerusakan struktur pada bangunan sehingga salah satu usaha mitigasi bencana gempa bumi adalah dengan memperkuat struktur bangunan. Gedung KANWIL BRI Banda Aceh sudah melewati berbagai gempa salah satunya gempa kembar tanggal 11 April 2012, yaitu gempa Simeulue I (8,3 SR). Untuk itu perlu dilakukan pengecekan ulang kerentanan struktur bangunan tersebut dengan memodelkan ulang struktur bangunan sesuai dengan spesifikasinya pada aplikasi SAP2000,  yang kemudian diberikan beban Pushover serta pembebanan Time History. Pengolahan data akan di analisis dengan aturan standar ATC-40, ASCE-41 serta dengan Incremental Dynamic Analysis (IDA). Berdasarkan hasil pushover dengan Respon spektrum kota Banda Aceh atas standar ATC-40 dan ASCE-41, gedung KANWIL BRI Banda Aceh didapat pada level kinerja Immediate Accupancy, kemudian dari hasil analisis dengan metode Incremental Dynamic Analysis (IDA) terhadap gempa Simeulu I, didapatkan kurva kerapuhan gedung di mana dengan skala 8,3 SR mengalami kemungkinan terjadinya kerusakan struktur Slight Damage sebesar 97,27%, 86,08% Moderate, 37,3% Extensive, dan untuk Collapse Damage sebesar 0,0004%.
PERBANDINGAN ANALISIS PORTAL GABLE BAJA MENGGUNAKAN METODE PANJANG EFEKTIF DAN METODE ANALISIS LANGSUNG Nurrizki, Syari Putri Winda; Hasan, Muttaqin; Panjaitan, M. Arief Rahman
Journal of The Civil Engineering Student Vol 5, No 3 (2023): Volume 5 Nomor 3 September 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v5i3.4566

Abstract

Tata Cara Perencanaan Struktur Baja menurut Standar Nasional Indoesia (SNI) 1729:2015 menggunakan metode analisis langsung (Direct Analysis Method, DAM), sementara metode panjang efektif (Effective Length Method, ELM) yang telah digunakan pada standar sebelumnya SNI 03-1729-2002 ditempatkan pada lampiran dan digunakan sebagai metode alternatif. Untuk ini, perlu dilakukan   suatu kajian untuk perbandingan analisis kedua metode tersebut. Tujuan penelitian ini adalah untuk mengetahui perbandingan hasil analisis berupa gaya dalam   (momen, gaya geser, gaya aksial), gaya reaksi perletakan, lendutan dan rasio    kapasitas struktur baja dengan metode ELM dan metode DAM. Meliputi diagram momen lentur, gaya geser, gaya aksial, gaya reaksi perletakan dan rasio kapasitas. Elemen struktur yang dikaji adalah elemen struktur portal gable baja. Bangunan yang menjadi objek penelitian adalah bangunan Gudang Alat Berat Dinas Cipta Karya Aceh. Pada tahap awal dilakukan pemodelan struktur portal gable baja, dan selanjutnya dilakukan pembebanan pada struktur portal berupa beban mati, beban hidup dan beban angin. Analisis kemudian dilakukan, dan hasil yang diperoleh menunjukkan bahwa dari analisis momen dan gaya geser, metode DAM lebih konservatif (lebih aman dalam desain) dibandingkan metode ELM karena metode DAM cenderung menghasilkan momen dan gaya geser lebih besar. Sedangkan bila ditinjau dari analisis gaya aksial, gaya reaksi perletakan, lendutan dan rasio kapasitas metode ELM lebih konservatif dari pada metode DAM.
Beton Mutu Tinggi menggunakan Tanah Diatomae sebagai Substitusi Semen: Kekuatan dan Absorpsi Maharani, Eva Ayudya; Hasan, Muttaqin; Saidi, Taufiq
Journal of The Civil Engineering Student Vol 5, No 4 (2023): Volume 5 Nomor 4 Desember 2023
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v5i4.20986

Abstract

Beton mutu tinggi memiliki nilai FAS (Faktor Air Semen) yang rendah, maka dibutuhkan semen dalam jumlah yang banyak pada campuran beton mutu tinggi. Salah satu solusi untuk mengurangi pemakaian semen ialah penggunaan secara parsial tanah diatomae sebagai pengganti semen. Penelitian ini bertujuan untuk mengetahui pengaruh variasi substitusi tanah diatomae dalam campuran beton mutu tinggi terhadap kuat tekan, kuat tarik belah, kuat tarik lentur, dan absorpsi beton. Dalam penelitian ini digunakan substitusi tanah diatomae dengan variasi 0% dan 10% dari berat semen. Digunakan FAS 0,3 dan superplasticizer sebesar 1,5% dari berat semen. Benda uji yang digunakan berbentuk silinder ukuran d = 100 mm; t = 200 mm dan balok dengan ukuran 100 mm × 100 mm × 400 mm. Digunakan 3 benda uji untuk setiap variasi dalam setiap pengujian. Sehingga total benda uji berjumlah 18 benda uji. Pengujian dilakukan pada umur beton 28 hari. Hasil penelitian menunjukkan bahwa dengan substitusi tanah diatomae sebesar 10% dapat meningkatkan nilai kuat tarik belah dan absorpsi, sedangkan nilai kuat tekan dan kuat lentur beton mengalami penurunan.Kuat tekan, kuat lentur, dan kuat lentur rata-rata tertinggi sebesar 87, 11 MPa, 7,03 MPa,dan 10,77 MPa pada variasi 0% tanah diatomae.
Preliminary Study of NFRP-Confined Concrete for Enhancing Compressive Strength Saidi, Taufiq; Hasan, Muttaqin; Amalia, Zahra
Aceh International Journal of Science and Technology Vol 12, No 1 (2023): April 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.1.31500

Abstract

A column is a structural element that carries axial compressive loads. This compressive axial load causes the shortening of the structural column. It causes the column to be subjected to a tensile force in its axis perpendicular to the compression axis. This tensile force causes the column to collapsereinforcement methods to improve the quality of concrete in resisting higher axial compressive loads. Strengthening the column with external restraints is expected to increase the strength of the concrete. The use of synthetic Fiber Reinforced Polymer (FRP) as a composite material for external restraint on structures is widely used for strengthening concrete structures. Considering the environmental impact, natural FRP materials have been developing nowadays. One of the natural fibers that have been researched and used as a composite material for Natural Fiber Reinforced Polymer (NFRP) is abaca fiber. This research aims to find the contribution of abaca fiber in increasing the compressive strength of confined concrete as a preliminary study. This study conducted the test by applying a compressive load to concrete specimens reinforced with NFRP restraints. Specimens were cylinders with a diameter of 150mm and 300mm in height. NFRP was applied at the cylinder circumference area (jacketing method) by using manual wet-layup techniques. The NFRP was investigated with variations in the number of NFRP layers. The results showed that NFRP-confined concrete has a higher compressive strength of 34.73% than the controlled specimen.
Behaviour Analysis of Strengthened-RC Beam with Natural Fiber Reinforced Polymer (NFRP) based on Abaca Fiber by Using Finite Element Method Saidi, Taufiq; Hasan, Muttaqin; Amalia*, Zahra; Iqbal, Muhammad
Aceh International Journal of Science and Technology Vol 11, No 2 (2022): August 2022
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.11.2.26520

Abstract

Synthetic fiber reinforced polymer (FRP) as an alternative composite material has been widely used for strengthening and repairing reinforced concrete structures. However, applying synthetic FRP materials is expensive and may be unsafe for the environment. Therefore, natural fiber reinforced polymer (NFRP) is the best alternative FRP, especially in increasing the shear strength of reinforced concrete beams. It has good tensile strength and also is environmentally friendly. Technological developments in the field of computing make modeling various aspects easier. One of them is modeling reinforced concrete (RC) beams. In this study, the ATENA V534 software was used to evaluate the results of the research and testing behavior of reinforced concrete beams. Behavior is evaluated in the form of load and deflection, the pattern of cracks and failure, and stress and strain of reinforcements. The numerical results obtained in ATENA V534 showed good agreement with experimental results. The maximum load of the four beams, namely BN, BSTV1, BSTV2, and BSTD1, based on the finite element method analysis results using ATENA V534 are 25,89 tons, 27,53 tons, 28,14 tons, and 26,92 tons, respectively. In contrast, the maximum load obtained from experimental results are 26,79 tons, 29,40 tons, 29,45 tons, and 27,14, respectively. The difference in crack angle in the beam between ATENA V534 and the experimental result is around 2. The results of numerical analysis using ATENA V534 show a lower maximum load value, higher stiffness, and lower deflection at maximum load compared to experimental results on all reinforced concrete beams analyzed in this study.
Tensile Strength of Natural Fiber in Different Types of Matrix Saidi, Taufiq; Hasan, Muttaqin; Amalia*, Zahra
Aceh International Journal of Science and Technology Vol 11, No 2 (2022): August 2022
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.11.2.26175

Abstract

In recent years, product-based products with low environmental impact have become one of the considerations in the construction structure. The attention of researchers toward the development of natural materials has been increasing. The use of natural fibers as composite materials for the strengthened structure has been studied. However, natural fibers are influenced by their hydrophilic nature and specific morphology. Thus, research on natural fiber composite materials still needs to be explored. This study evaluates the tensile strength of natural fiber composite materials based on the type of fiber, fiber layer used, and resin type according to ASTM D3039. The highest tensile strength was found in the epoxy resinbased matrix composite with three layers of abacaa fiber (SAAE-LP3) by 111.45 MPa. The results show that the type of fiber, fiber layer used, and resin in the composite matrix considerably affect its tensile strength performance.
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.
Co-Authors abdi, aufar Abdullah Abdullah Achmad, Ashfa Al-Bakri, Nazira Suha Alfiansyah Yulianur BC Amalia*, Zahra Amna, Khirul Arief Panjaitan Bambang Setiawan Edhi, Sarwo Fonna, Syarizal Fu, Li Habibie, Muhammad Haiqal, Muhammad Hamzani Hamzani Hanafi, Muhammad Fujii Husaini Husaini Juellyan, Juellyan Maharani, Eva Ayudya Mahlil, Mahlil Mochammad Afifuddin Mubarak, Azzaki Muhammad Azhari Muhammad Fauzi Muhammad Imran Muhammad JAMIL Munirwansyah Munirwansyah Nurrizki, Syari Putri Winda Nurwijayanti Panjaitan*, Arief Purwandy Hasibuan, Purwandy Rachman, Aulia Rudiansyah Putra Sagala, Vreslisawati Setiawan, Alhadi Setya Primaulia, R. Adhi Shimizu, Masaru Sugiarto S Surya Bermansyah, Surya Taufiq Saidi Yulia Hayati, Yulia Yusputri, Rafiqa Muhnita Zahra Amalia