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All Journal Journal of Civil Engineering SAINSTEK Kohesi: Jurnal Sains dan Teknologi
Yosi Noviari Wibowo
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation Other

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ANALISIS DEFLEKSI LATERAL DAN PENURUNAN PONDASI TIANG PANCANG BAJA PADA ABUTMENT JEMBATAN : STUDI KASUS JEMBATAN SEI ELLA 1 Kohar Yudoprasetyo; Moh. Fadhlan Rosyidi; Ifarrel Rachmanda Hariyanto; Naura Firdausi; Moh. Safi’i Mansur; Khansa Fadilah Ashara; Yosi Noviari Wibowo; Mohammad Akbar Alrasyidi
Kohesi: Jurnal Sains dan Teknologi Vol. 6 No. 9 (2025): Kohesi: Jurnal Sains dan Teknologi
Publisher : CV SWA Anugerah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.3785/kohesi.v6i9.10245

Abstract

This study aims to evaluate the performance of steel pile foundations for the abutment of the Sei Ella 1 Bridge, located at the Ela River, West Kalimantan, with soil conditions consisting of sedimentary layers. The analysis was conducted based on actual piling conditions, where pile depths vary between 4.015 meters and 5.823 meters. The evaluation includes calculating the single pile bearing capacity using the Decourt method, analyzing group pile capacity with the efficiency group approach, and assessing lateral deformation and settlement using the Finite Element Method (FEM). The results show that the single pile and group pile capacities are sufficient to withstand the loads from the superstructure, abutment self-weight, and lateral soil pressure. The lateral deformation analysis yielded a deflection value of 2.83 mm, while the settlement was recorded at 0.1152 mm. Both values are well below the maximum limit set by SNI 8460:2017, which is 12.5 mm, indicating that the foundation is in a safe and stable condition. This study provides a deeper understanding of the performance of steel pile foundations for the abutment of the Sei Ella 1 Bridge. As an additional verification step, it is recommended to conduct Static Loading Tests (compressive, tensile, and lateral) to validate the analysis results. This approach offers a robust foundation for ensuring the safety, stability, and feasibility of the design under actual conditions..
NUMERICAL INVESTIGATION OF GEOPOLYMER REINFORCED CONCRETE BEAMS UNDER FLEXURAL LOADING USING 3DNLFEA Yosi Noviari Wibowo; Bambang Piscesa; Yuyun Tajunnisa
Journal of Civil Engineering Vol. 37 No. 1 (2022)
Publisher : Institut Teknologi Sepuluh Nopember (ITS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v37i1.7628

Abstract

This paper deals with numerical modeling of geopolymer reinforced concrete loaded under flexure using nonlinear finite element analysis. The modeled specimen was obtained from the existing literature and is tested under the four-point bending load. The numerical simulation uses an in-house limited element package called 3D-NLFEA, which utilizes ordinary concrete's multi-surface plasticity model. Since the concrete constitutive model used is for ordinary Portland cement, adjusting the input parameter is required to predict the behavior of geopolymer reinforced concrete. The focus on the discussion was limited to the modeling of the specimen, the moment-curvature result, and the crack pattern between the numerical model and the available experimental test. The simulation found that the predicted moment-curvature relationship using the 3D-NLFEA package was 1.3 to 2.4 % lower than the test result. The crack pattern was controlled by flexure, which was observed in the experimental test and numerical simulation. The predicted crack lengths for modeled beam using 3D-NLFEA were within the minimum and maximum measured crack lengths from the test result.
Integrasi Bridge Management System (BMS) dan Non-Destructive Testing (NDT) untuk Prediksi Umur Jembatan pada Ruas Jalan Jawa Timur Kohar Yudoprasetyo; Moh. Fadhlan Rosyidi; Ifarrel Rachmanda Hariyanto; Yosi Noviari Wibowo; Moh. Safi’i Mansur
SAINSTEK Vol. 14 No. 1 (2026)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v14i1.432

Abstract

Penelitian ini bertujuan untuk mengeksplorasi penggunaan Bridge Management System (BMS) yang digabungkan dengan pengujian Non-Destructive Testing (NDT) berupa Ultrasonic Pulse Velocity (UPV) dan Schmidt Hammer Test untuk menilai kondisi jembatan pada ruas jalan Batas Kabupaten Lamongan – Batas Kota Gresik. Analisis dilakukan dengan tujuan untuk mengembangkan model prediksi umur jembatan yang lebih akurat dengan mengintegrasikan hasil survei visual dan data teknis dari uji NDT. Hasil penelitian menunjukkan bahwa nilai kondisi jembatan (NK) memiliki hubungan yang signifikan dengan mutu beton yang diukur menggunakan metode NDT, di mana semakin tinggi nilai NK, semakin rendah kualitas beton dan kecepatan rambat gelombang ultrasonik. Berdasarkan model prediksi, jembatan dengan nilai kondisi lebih baik diprediksi memiliki umur sisa yang lebih panjang, sementara jembatan dengan nilai kondisi lebih buruk memerlukan tindakan pemeliharaan lebih mendesak. Penelitian ini memberikan kontribusi terhadap pengembangan sistem manajemen jembatan yang lebih efisien, meningkatkan keselamatan infrastruktur, serta memberikan rekomendasi pemeliharaan berbasis data untuk jembatan-jembatan yang terletak di koridor strategis Provinsi Jawa Timur.
Co-Authors Bambang Piscesa Ifarrel Rachmanda Hariyanto Khansa Fadilah Ashara Kohar Yudoprasetyo Kohar Yudoprasetyo Moh. Fadhlan Rosyidi Moh. Safi’i Mansur Mohammad Akbar Alrasyidi Naura Firdausi Yuyun Tajunnisa