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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Teknik Sipil
Widjojo A. Prakoso
Civil Engineering Department University of Indonesia, Depok 16424.
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences

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Development of qc – Vs Correlation for Depok Silt-Clay Prakoso, Widjojo A.
Jurnal Teknik Sipil Vol 17, No 3 (2010)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.872 KB)

Abstract

Abstract. To initiate the development of cone penetration resistance qc and shear wave velocity Vs correlations of soils from Indonesia, the results of mechanical cone penetration soundings and seismic downhole tests from Depok, West Java area are compiled and analyzed. The soils are  predominantly silt-clay soils. The results of the tests are used to develop a qc – Vs correlation. The results and the associated correlation are then compared to qc – Vs correlations from other countries. Abstrak. Dalam rangka pengembangan korelasi antara tahanan konus qc dan kecepatan rambat gelombang geser Vs untuk tanah Indonesia, hasil dari uji sondir mekanik dan uji seismic downhole dari daerah Depok, Jawa Barat dikumpulkan dan dianalisis. Tanah dari lokasi pengujian adalah tanah lanau-lempung. Hasil dari kedua jenis pengujian digunakan untuk mengembangkan korelasi antara qc dan Vs. Korelasi tersebut kemudian dibandingkan dengan korelasi sejenis dari beberapa negara.
Technical Notes Shear-Wave Velocity of Cemented Soils of Jakarta Prakoso, Widjojo A.
Jurnal Teknik Sipil Vol 18, No 3 (2011)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (307.874 KB)

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Abstrak. Dalam rangka pengembangan korelasi antara kecepatan rambat gelombang geser vs dan tahanan penetrasi standar N-SPT untuk tanah Indonesia, hasil dari uji penetrasi standar dan uji seismic downhole dari tiga lokasi di daerah Jakarta dikumpulkan dan dianalisis. Fokus dari makalah ini adalah tanah tersementasi. Hasil dari kedua jenis pengujian digunakan untuk mengembangkan korelasi vs – N-SPT. Korelasi tersebut kemudian dibandingkan dengan korelasi yang terdapat di dalam literatur. Abstract. To initiate the development of shear-wave velocity vs and standard penetration resistance N-SPT correlations of soils from Indonesia, the results of standard penetration tests and seismic down hole tests from three locations in Jakarta area are compiled and analyzed. The focus of the present paper is on cemented soils. The results of the tests are used to develop a vs – N-SPT correlation. The results and the associated correlation are then compared to existing correlations available in the literature.
Development of qc – Vs Correlation for Depok Silt-Clay Widjojo A. Prakoso
Jurnal Teknik Sipil Vol 17 No 3 (2010)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2010.17.3.6

Abstract

Abstract. To initiate the development of cone penetration resistance qc and shear wave velocity Vs correlations of soils from Indonesia, the results of mechanical cone penetration soundings and seismic downhole tests from Depok, West Java area are compiled and analyzed. The soils are predominantly silt-clay soils. The results of the tests are used to develop a qc – Vs correlation. The results and the associated correlation are then compared to qc – Vs correlations from other countries. Abstrak. Dalam rangka pengembangan korelasi antara tahanan konus qc dan kecepatan rambat gelombang geser Vs untuk tanah Indonesia, hasil dari uji sondir mekanik dan uji seismic downhole dari daerah Depok, Jawa Barat dikumpulkan dan dianalisis. Tanah dari lokasi pengujian adalah tanah lanau-lempung. Hasil dari kedua jenis pengujian digunakan untuk mengembangkan korelasi antara qc dan Vs. Korelasi tersebut kemudian dibandingkan dengan korelasi sejenis dari beberapa negara.
Application of the Simple Multi-Attribute Rating Technique (SMART) for Selecting Compatible Earthquake Time Series in Liquefaction Analysis Support: Case Study in Serpong, Tangerang, Indonesia Haifani, Akhmad Muktaf; Setiadipura, Topan; Prakoso, Widjojo A.
Indonesian Journal on Geoscience Vol. 13 No. 1 (2026)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.13.1.57-76

Abstract

The earthquake hazard must be mitigated at the prospective nuclear power plant site in Serpong, Tangerang, to avoid damage to the nuclear installation infrastructure, especially the possibility of liquefaction. This study combines Probabilistic Seismic Hazard Analysis (PSHA) with Ground Motion Prediction Equation (GMPE) (Abrahamson, 2014), which is used as a probabilistic prediction model. This is to estimate spectral accelerations and Peak Ground Acceleration (PGA) based on earthquake magnitude, distance, and site characteristics. Calculations were carried out using OpenQuake for PHA calculation and Seismomatch for spectra matching analysis, which produced the deaggregation results used to define the target spectrum. Representative time histories were chosen using the SMART technique, which uses ranking and weighting to assure compliance with deaggregated magnitude-distance situations, then refined using spectral matching of 90 records while keeping nonstationary properties. Both shallow crustal and subduction events have a substantial impact on seismic demand, with the 2011 Tohoku earthquake (Mw 9.0, depth 29 km, distance 245.9 km, PGA 0.26 g) appearing as the most compatible scenario and primary contributor to possible site risks. The suggested paradigm provides a realistic solution to site-specific ground motion selection and liquefaction risk assessment, hence promoting nuclear safety and seismic resilience in tectonically active regions.
Co-Authors Damrizal Damoerin, Damrizal Haifani, Akhmad Muktaf I Nyoman Sukanta, I Nyoman Irfan Budiman Iwan Soedigdo Topan Setiadipura, Topan Yunita Utami, Yunita