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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Research Report - Engineering Science Sinergi Jurnal Teknik Sipil Teras Jurnal Journal of the Civil Engineering Forum U Karst BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil JMTS: Jurnal Mitra Teknik Sipil Journal of Applied Engineering and Technological Science (JAETS) Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Journal of the Civil Engineering Forum Indonesian Geotechnical Journal Jurnal Teknik Sipil Jurnal Teknik Sipil
Paulus Pramono Rahardjo
Universitas Katolik Parahyangan
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Analisis Probabilitas Bahaya Gempa di Ibu Kota Baru Indonesia Mountainshia, Rocky; Rahardjo, Paulus Pramono; Aditramulyadi, Dega Damara
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 28, Nomor 2 (2022)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v28i2.44682

Abstract

Upaya pemindahan ibu kota Indonesia ke Kalimantan dimaksudkan untuk mengatasi masalah overpopulasi di Jakarta, sehingga memungkinkan adanya pembangunan infrastuktur yang masif di masa yang mendatang. Pada penelitian ini dilakukan Probabilistic Seismic Hazard Analysis (PSHA) dan membuat peta hazard gempa yang berfungsi untuk perecanaan bangunan tahan gempa untuk daerah Ibu Kota Baru Indonesia. PSHA dan peta gempa dibuat untuk probabilitas terlampaui 2% dalam 50 tahun atau periode ulang 2500 tahun. Hasil analisis pada tiga periode penting yaitu PGA, Ss, dan S1 di batuan dasar dengan periode ulang 2500 tahun memiliki percepatan gempa dibatuan dasar lebih besar jika menggunakan GMPE 2017 daripada GMPE 2010 untuk periode kecil antara PGA dan 0,1s. Percepatan gempa maksimum di batuan dasar hasil pembuatan peta bahaya gempa di Ibu Kota Baru Indonesia pada periode PGA, Ss, dan S1 di batuan dasar untuk periode ulang 2500 tahun secara berturut-turut adalah 0,2-0,25g; 0,4-0,5g; dan 0-0,15g. Indeks ancaman bencana pada Ibu Kota Baru Indonesia dikategorikan rendah menurut peraturan BNPB (PGA<0,2501g).
Studi Kompressibilitas Tanah Vulkanik yang Dipadatkan Dengan Cara Statik dan Dinamik: Compressibility Study of Volcanic Soil Compacted by Static and Dynamic Methods Gagas Prabowo; Paulus Pramono Rahardjo; Rinda Karlinasari
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 11 No 2 (2023): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Juli 2023)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v11i2.5916

Abstract

Road construction projects in Indonesia are often located on volcanic soils, where borrow pit options will be limited to volcanic soils. In the construction of compacted earth roads generally have an immediate settlement, but in fact there is a long-term settlement in compacted soil. In general, the compaction carried out in the field is different from that in the laboratory. Where compaction in the field leads to static conditions while in the laboratory it is dynamic. This study aims to analyze the mechanism of static or dynamic compaction and its relationship with compressibility. Determination of creep using Oedometer testing with saturation and unsaturated methods. Laboratory test results show that different compaction methods will affect the dry unit weight value of the soil, where in this test the dry unit weight value for dynamic compaction is 1,38 g/cm3 and for static compaction it is 1,44 g/cm3 or an increase of 4,35% to 7,96% . The value of the secondary consolidation coefficient increases along with increasing load on the Oedometer test, but with different characteristics for each sample. In this study, the secondary consolidation coefficient tends to decrease by 10% – 40% when using higher compaction energy. While the compressibility index value decreased to 52%.
Stress-strain behavior and residual strength of Petobo sand with variable fines content under consolidated undrained triaxial loading Desiana Vidayanti; Paulus Pramono Rahardjo; Ramli Nazir
SINERGI Vol. 30 No. 1 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2026.1.025

Abstract

Liquefaction was one of the primary causes of severe ground deformation during the 2018 Palu earthquake, particularly in the Petobo area, where large-scale flow liquefaction resulted in extensive ground displacement. Despite extensive field investigations, laboratory-based residual shear strength data for Petobo soil had not been available to explain the exceptional mobility of the flowslide. This study investigated the stress-strain response and post-liquefaction residual strength of Petobo silty sand with variable fines content using monotonic consolidated undrained (CU) triaxial tests. Reconstituted specimens were prepared using the moist tamping method with fines contents of approximately 9% and 26.4% and tested under three levels of initial mean effective stress. The results showed that specimens with higher fines content generated excess pore water pressure more rapidly and exhibited stronger contractive behavior at small strains. At large strains, however, both fines contents mobilized comparable residual strength levels, expressed as normalized residual strength ratios (qres/p’0) ranging from 0.79 to 0.94. These findings indicate that while fines content influenced early-stage contractive behavior and pore-pressure generation, its effect on post-liquefaction residual strength under very loose density conditions was limited. The residual shear resistance was primarily governed by the loose sand fabric and the effective stress level at the stabilized post-peak condition. This study provides the first laboratory-based residual shear strength data for Petobo silty sand, offering essential parameters for back-analysis, numerical modeling, and liquefaction hazard assessment related to flow-type deformation in Palu and similar alluvial environments. 
Studi tentang Laju Perubahan Volume dan Konsolidasi Tanah Very Soft dan Ultra Soft Berdasarkan Teori Terzaghi dengan Menggunakan Uji Oedometer dan CPTu Maria Septhree Winna Sitohang; Paulus Pramono Rahardjo; Aswin Lim
Jurnal Teknik Sipil Vol 22 No 1 (2026): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v22i1.12973

Abstract

Very soft and ultra soft soils are types of soil with high water content, very soft consistency, and low bearing capacity, making them susceptible to deformation and subsidence due to loading. This study aims to determine the correlation between volume change parameters and consolidation in very soft and ultra-soft soils based on laboratory testing (oedometer test) and in-situ testing (Cone Penetration Test with Pore Pressure Measurement/CPTu). The parameters studied include the consolidation coefficient (Cv), compression index (Cc), volume change coefficient (mv), and parameter α as the correlation between the mv value from the oedometer test and the corrected cone resistance (qt) value from CPTu. The results show that the Cv value varies with each increase in effective stress. Additionally, the consistency of the α correlation values indicates that CPTu can be used to quickly and efficiently estimate volume change coefficient (mv) values in the field. Therefore, CPTu can serve as an alternative for predicting the behavior of very soft and ultra-soft soil conditions in situ in a more representative manner. 
PERBANDINGAN PERILAKU PERBAIKAN TANAH METODE PRELOADING VAKUM DAN PRELOADING TIMBUNAN DENGAN ELEMEN HINGGA 2D Zakwan Gusnadi; Paulus Pramono Rahardjo; Aswin Lim
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.513

Abstract

Abstrak Perbaikan tanah lunak dengan pra-beban (preloading) dimaksudkan untuk mereduksi penurunan pada masa operasional dan meningkatkan kekuatan tanah. Preloading dalam perbaikan tanah lunak biasanya dikombinasikan dengan Prefabricated Vertical Drain (PVD) guna mempercepat proses disipasi air pori. Metode preloading dapat dilakukan dengan cara konvensional menggunakan timbunan ataupun dengan tekanan vakum. Untuk mengetahui perilaku preloading dengan tekanan vakum ini digunakan metode elemen hingga 2D menggunakan program bantu ABAQUS (berasal dari nama alat hitung Abacus). Hasil analisis menunjukan pada hari ke 217 perbaikan preloading vakum menghasilkan penurunan sebesar 1,23 m dan preloading timbunan menghasilkan penurunan sebesar 1,18 m, namun pola penurunan yang terjadi dengan preloading vakum terlihat lebih besar pada 35 hari pertama perbaikan. Pada perubahan tekanan air pori preloading vakum menunjukan reduksi tekanan air pori, sedangkan dengan preloading timbunan tekanan air pori meningkat pada masa konstruksi dan tereduksi pada masa perbaikan. Lebih lanjut pada perilaku deformasi lateral di kaki timbunan, metode preloading vakum menunjukan pergerakan lateral ke arah dalam area perbaikan sedangkan dengan preloading konvensional pergerakan lateral tanah terjadi ke arah luar area perbaikan. Kata kunci: ABAQUS, Elemen Hingga 2D, Perbaikan Tanah, Vakum Preloading Abstract Improvement of soft soil by preloading is intended to lower the settlement of operation time and increasing soil strength. Preloading in the improvement of soft soil usually combined with Prefabricated Vertical Drain (PVD) to accelerate the pore water dissipation process. The preloading method can be done in a conventional way using the embankment or vacuum pressure. To find out the behaviour of preloading with this vacuum pressure, we used the finite element method 2D by using the ABAQUS support program. The result of the analysis shows on the 217th day, vacuum preloading improvement produces a settlement by 1.23 m and the embankment preloading produce 1.18 m, but the settlement pattern that occurs with preloading vacuum was seen to be greater in the first 35 days of improvement. In terms of changes in pore water pressure on vacuum preloading shows that the pattern of pore water pressure is reduced, while with pore eater pressure on preloading heap increased during construction and reduced during improvement. Further on the lateral movement behaviour in the toe of the embankment, the vacuum preloading method shows the lateral movement towards the improvement area while embankment preloading shows the lateral movement occurs towards the outside of the improvement area. Keywords: ABAQUS, Finite Element 2D, Soil Improvement, Vacuum Preloading
Co-Authors Abram Kris Wicaksono Aditramulyadi, Dega Damara Ahmad Kemal Arsyad Akhmudiyanto Akhmudiyanto Albert Johan Albert Johan Anastasia Sri Lestari Andrianto Muliawan Permana Andy Sugianto Anthonius Steven Sutanto Antony Kesuma Aris Handoko Arsyad, Ahmad Kemal Asriwiyanti Desiani Aswin Lim Bondan Widi Anggoro Budijanto Widjaja Cecilia Lauw Giok Swan Cindarto Clinton Girsang Desiana Vidayanti Fahmi Aldiamar, Fahmi Gagas Prabowo Gagas Prabowo Georgeshua, Cornelius Grisella Aglia Hansen Tananda Imam Achmad Sadisun Indrayana, Rinda Karlinasari Jogiadinata, Evelyn Johan, Albert Kevin Martandi Setianto Lie, Edwin Mardjuni, Adhystira Maria Septhree Winna Sitohang Martin Wijaya Melissa Kurnia Metta Devi Hartadi Mountainshia, Rocky Nazir, Ramli Nisa Utami Rachmayanti Petrus Chanel Suprihadi Santoso Ramli Nazir Ricky Setiawan Rinda Karlinasari Rinda Karlinasari Rinda Karlinasari Septiastuti, Fenny Tanti Muliati Vinna Fransiska Chou Wellyanto Wijaya Wijaya, Martin Wiwarsono, Fransisko Yohanes Albrecht Montol Yusi Sulastri Zakwan Gusnadi Zakwan Gusnadi