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All Journal Jurnal Konstruksia Prosiding Semnastek Surya Beton : Jurnal Ilmu Teknik Sipil Jurnal Momen : Teknik Sipil Suryakancana International Journal of Civil Engineering and Infrastructure (IJCEI)
Tanjung Rahayu
Universitas Muhammadiyah Jakarta
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Transportation

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NUMERICAL MODELLING ON BEHAVIOUR OF COLD-FORMED STEEL UNLIPPED CHANNEL UNDER COMBINED COMPRESSION AND BENDING ACTIONS Tanjung Rahayu Raswitaningrum; Budiman Budiman; Basit Al Hanif; Sahrul Mujib
International Journal of Civil Engineering and Infrastructure Vol 2, No 2 (2022): IJCEI Volume 2 No. 2
Publisher : University Of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.719 KB) | DOI: 10.24853/ijcei. 2. 2. 10-18

Abstract

Research and development of construction materials continue to be carried out, getting materials, cross-sectional shapes, and manufacturing methods that are more efficient than before. Cold-formed steel is a material breakthrough in construction that has advantages over hot-rolled steel. In this paper, the cross-section of cold-rolled steel unlipped channel will be analyzed which is subjected to a combination of axial and bending loads. Investigating elements will be carried out using the finite element method on ABAQUS, and the results of the analysis produce a visualization of the behavior and capacity of the cold-rolled steel section. The cross-section capacity results obtained from the numerical test results will be compared with the predictions given by SNI 7971-2013 or AS/NZS 4600. Existing research in the literature will be used as a reference in conducting numerical analysis and calculating ultimate capacities.
SIMULATION OF RING CONNECTION MODIFICATION ON FLARE STACK STRUCTURE Budi Satiawan; Basit Al Hanif; Tanjung Rahayu Raswitaningrum
International Journal of Civil Engineering and Infrastructure Vol 2, No 2 (2022): IJCEI Volume 2 No. 2
Publisher : University Of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.403 KB) | DOI: 10.24853/ijcei. 2. 2. 1-9

Abstract

The flare stack serves to protect process equipment facilities against unexpected overpressure. This study aims to follow up on previous research that recommends improvements to the flare stack structure based on corrosion findings that occur in the area of the riser stack around the ring connection for the guy wire. By replacing rusty material, it is also necessary to consider modifications to prevent the risk of re-corrosion. Based on current design observations in the connection ring area for guy wire, side cutting is required which can result in water being trapped. This research aims to find out whether by modifying the connection ring for guy wire, this flare structure still has structural reliability when receiving critical outer loads or not. Based on the results of the study, it shows that modifying the geometry of the connection ring guy wire still provides reliable structural performance when receiving critical outer loads. The maximum stress that occurs in the area around the pad eye is 71.2 Mpa with a maximum stress ratio of 0.434 it shows that the value is still quite far from the maximum allowable voltage ratio of 1.0. So it can be concluded by modifying the connection ring for guy wire to prevent the risk of corrosion can be done without causing a decrease in the performance of the structure in withstanding critical outer loads.
Perbaikan Daya Dukung Tanah Menggunakan Metode Cement Fly-Ash Gravel (CFG) Pile Alternatif Pengganti Metode Stone Column Haryo Koco Buwono; Tanjung Rahayu; Nadia Sabila Putri
Surya Beton : Jurnal Ilmu Teknik Sipil Vol. 7 No. 1 (2023)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Muhammadiyah Purworejo

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Abstract

Ada banyak metode penanganan untuk pondasi dangkal pada tanah lunak, pondasi komposit tiang CFG adalah salah satu metode penanganan yang umum. Dalam makalah ini diperkenalkan penerapan CFG pile pada pembangunan jalan raya, disampaikan bahwa pondasi komposit CFG pile merupakan metode penanganan pondasi yang sederhana, cepat, ekonomis dan efektif. Sejumlah besar ilmu rekayasa, proyek pondasi komposit tiang pancang CFG memiliki karakteristik biaya rendah, bahan mudah ditarik dan teknologi handal. Ini banyak digunakan untuk penanganan semua jenis fondasi lunak seperti tanah kohesif, tanah berlumpur, dan tanah berpasir. Untuk penanganan masalah tersebut, perlu dilakukan perbaikan tanah saat pekerjaan subgrade. Dengan menganalisis perbandingan perbaikan tanah dengan CFG pile dan stone column dalam peningkatan daya dukung tanah untuk permodelan pembangunan jalan raya berdasarkan faktor keamanan daya dukung tanah sebesar 3. Sehingga didapat desain pile yang memiliki diameter 0,5 m dan tinggi pile 40 m serta jarak antar pile 2,5 m. Beban pile sebesar 10 ton yang merupakan MST mutu jalan kelas I, dari permodelan didapat daya dukung tanah setelah perbaikan dengan CFG pile sebesar 1514,989 kN dan stone column sebesar 1465,871 kN.
Pengaruh Tinggi Tertanam Pondasi Block Terhadap Karakteristik Dinamik Pondasi Mesin Budi Satiawan; Tanjung Rahayu
Konstruksia Vol 14, No 2 (2023): Jurnal Konstruksia Vol 14 No. 2 Tahun 2023
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jk.14.2.163-174

Abstract

Penelitian ini dilakukan untuk melihat bagaimana pengaruh dari panjang pondasi tertanam didalam tanah terhadap karakterisik dinamis pondasi mesin. Dari penelitian diperoleh dengan pengurangan tinggi ratio tertanam pondasi (Rh) dari 90% ke 20% diperoleh penurunan frekuensi arah vertikal (fnz) sebesar 5,24% dan untuk frekuensi alami arah horizontal (fnx) diperoleh penurunan sebesar 10,66%. Penurunan nilai frekuensi alami pondasi dapat beresiko pada meningkatnya respon pondasi akibat beban vibrasi mesin jika pondasi mesin didesain berada di atas frekuensi operasi mesin (high tune system) dan mendekati frekuensi operasi mesin.
Co-Authors Basit Al Hanif Budi Satiawan Budi Satiawan Budi Satiawan Budiman Budiman Eko Yuliawan Farhan Asmoro Triputro Haryo Koco Buwono Khamal Firmansyah Agustiana Lidiya Fitriyani Mohammad Fazar Nadia Sabila Putri Pemi Ihsan Randy Fajar Aris Setiawan Rocky Armidion Sahrul Mujib Salman Alfarisi Suwandi Suwandi