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Alfath Zain
Universitas Teknokrat Indonesia
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Social Sciences

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Analisis Struktur Balok Tahan Gempa pada Bangunan Gedung Asrama IAI An Nur Lampung Aldi Yudhatama; Alfath Zain; M. Rizky Ismail
Jurnal Konstruksi Vol 23 No 1 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-1.2090

Abstract

Indonesia merupakan salah satu negara yang mempunyai risiko gempa yang tinggi, karena terletak di Cincin Api Pasifik, tepatnya di persimpangan tiga lempeng tektonik besar. Objek penelitian ini adalah gedung asrama tiga lantai yang menampung banyak santri, sehingga diperlukan perkuatan struktur agar mereka dapat menyelamatkan diri saat terjadi bencana. Tujuan penelitian ini adalah menganalisis balok yang tahan terhadap gempa sesuai acuan SNI 1726:2019, sehingga didapatkan pembesaran balok dari dimensi awal 25 x 50 cm menjadi 40 x 50 cm akibat beban gempa. Kebutuhan tulangan longitudinal untuk tumpuan adalah 3D19, 2D13, 3D19, sedangkan untuk lapangan adalah 3D19, 2D13, 3D19. Untuk tulangan sengkang, dibutuhkan 2D13 – 100 di tumpuan dan 2D13 – 150 di lapangan, yang semuanya memenuhi syarat kapasitas lentur, geser, dan torsi sesuai SNI 1726:2019. Namun, abstrak ini kurang menonjolkan keunikan penelitian, seperti pendekatan spesifik yang diambil untuk memenuhi persyaratan SNI 1726:2019, serta inovasi dalam metode atau hasil penelitian. Selain itu, detail hasil kurang spesifik, terutama mengenai dampak langsung dari perubahan dimensi balok terhadap keamanan bangunan. Penambahan informasi kuantitatif, seperti efisiensi struktur atau peningkatan kapasitas lentur dan geser, akan memberikan gambaran yang lebih jelas mengenai kontribusi penelitian ini terhadap keselamatan bangunan.
Simulasi Potensi Banjir Sungai Way Balau Menggunakan HEC-RAS dan Data Curah Hujan Satelit Dea Septa Ananda; Alfath Zain; Destiana Safitri
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2401

Abstract

This study aims to simulate the flood potential of the Way Balau River, Bandar Lampung City, using rainfall data from the GPM-IMERG satellite and HEC-RAS software. The analysis uses a log-normal distribution for rainfall, a rational method for discharge calculation, and water level simulation is performed at STA. 301. The results show that a 0.5 m high embankment on the left side is capable of withstanding a 5-year return period discharge, but in the 25, 50, and 100-year return periods, there is overflow on the right side with water heights of 0.16 m, 0.25 m, and 0.33 m, respectively. This study recommends increasing the capacity of the embankment on the right side of the river to mitigate the risk of long-term flooding.
Simulasi Potensi Luapan Sungai Menggunakan HEC-RAS pada Kondisi Curah Hujan Ekstrem Roland Sitorus; Alfath Zain; Panti Wahyu Ningsih
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2402

Abstract

This study simulates flood potential in the Nunyai River, Bandar Lampung City, using GPM-IMERG satellite rainfall data from 2014–2023. A normal distribution was applied to estimate design rainfall, which was then converted into flood discharge using the rational method. The HEC-RAS 5.0.6 simulation results indicate that five river cross-sections are unable to accommodate Q10–Q100 discharges, leading to overflow on the left, right, or both sides. These findings highlight the need for river normalization and levee reinforcement at vulnerable overflow points.
Pengaruh Variasi Campuran Serbuk Kayu Akasia, Jati, Medang Terhadap Kuat Tekan Beton Made Sandita Pranatya; Alfath Zain
Jurnal Konstruksi Vol 23 No 2 (2025): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.23-2.2478

Abstract

This study aims to evaluate the effect of adding teak, acacia, and medang wood powder on the compressive strength of concrete and its suitability for non-structural applications. This study was conducted experimentally in a laboratory by making cylindrical concrete test specimens and testing their compressive strength after 28 days. Wood powder was mixed into normal concrete with variations of 0% (control concrete), 20%, 40%, and 60%. The test results showed that concrete with a 20% wood powder mixture still met the criteria for non-structural use, with an average compressive strength of 9.60 MPa. However, the addition of large amounts of wood powder (40%–60%) caused a significant decrease in compressive strength, with average values ranging from 6.49 MPa to 4.42 MPa. The control concrete without wood powder showed the best performance with an average compressive strength of 10.79 MPa. These findings indicate that wood powder from Teak, Acacia, and Medang trees can be used as a partial substitute for sand in non-structural concrete mixtures with a maximum usage limit of 20%. The implication is that the use of wood powder at this level not only has the potential to reduce production costs but also helps reduce the need for sand by around 0.93 kg per concrete mixture, thereby contributing to wood waste management and natural resource conservation.
Co-Authors Adinata, Chandra Aldi Yudhatama Anugriansyah, Anggry Dalimunthe, Ernando Rizki Dea Septa Ananda Destiana Safitri Dian Pratiwi dirga, Dirga Rama setiadi Jamaludin . M Rizky Ismail M. Rizky Ismail Made Sandita Pranatya Misdalena, Felly Novia Utami Putri Panti Wahyu Ningsih Prayoga, Anggi Pujianto, Tri Roland Sitorus Sandya, I Gede Agung Saputra, Achmad Faisal Saputra, Edo Dwi Sari, Renanda Okta Yacub, Vanita Kesumawati