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All Journal Indonesian Journal of Geography Civil Engineering Forum Teknik Sipil TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Jurnal Pengembangan Energi Nuklir IJOG : Indonesian Journal on Geoscience Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences Jurnal Teknik Sipil Civil Engineering Dimension ComTech: Computer, Mathematics and Engineering Applications Narotama Jurnal Teknik Sipil Indonesian Geotechnical Journal Jurnal Jalan Jembatan Journal of Engineering and Technological Sciences
Masyhur Irsyam
Department of Civil Engineering, Faculty of Civil and Environmental Engineering, Institut Teknologi Bandung, Jalan Ganesha No. 10, Bandung 40132
Aerospace Engineering Astronomy Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Physics Social Sciences Transportation Other

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Making PGA hazard curve in big cities of bengkulu by using USGS PSHA modified Chintya Meidina Azwar; Arifan Jaya Syahbana; Anggun Mayang Sari; Muhammad Asrurifak; Hendriyawan Hendriyawan; Masyhur Irsyam
Indonesian Geotechnical Journal Vol. 1 No. 1 (2022): Vol.1 , No.1, April 2022
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (743.501 KB) | DOI: 10.56144/igj.v1i1.8

Abstract

The tectonic plate movement that limits the Indonesian territory causes frequent earthquakes because the plates have dynamic rocks properties with varying strengths. The collision of the plates causes fault zones, such as in Bengkulu, a region traversed by the Sumatran fault with a record of many earthquakes. The rapid growth and development of technology could support increased infrastructure development by considering earthquakes a major global hazard. Therefore, this study aimed to create a PGA hazard curve useful in improving infrastructure development in Bengkulu's big cities. Data were sourced from the Book of Indonesian Earthquake Hazard and Source 2017. The United States Geological States Probabilistic Seismic Hazard Analysis (USGS PSHA) software was modified regarding the Ground Motion Prediction Equation (GMPE) database. The GMPE used in this study are (1) BC Hydro (2012) updated for subduction source; (2) Campbel Bozorgnia (2014), Boore Atkinson (2014) and Chiou Young (2014) for shallow crustal source, and (3) Zhao et al. (2006) and Abrahamson et al. (2018) for intraslab, with 500, 1,000, 2,500, 5,000, and 10,000 years return periods. The results obtained using the new GMPE showed a change in the maximum acceleration. The Hazard Curve (HC) and PGA map showed that the Kepahiang and Lebong Districts have the highest PGA values of 1.8070 and 1.8433 g, respectively, for the 10,000 year return period. The lowest value was 0.297g recorded in Rejang Lebong for 500 year return period.
ANALISIS DAN EVALUASI FAKTOR AMPLIFIKASI PERCEPATAN PUNCAK GEMPA DI PERMUKAAN TANAH Fahmi Aldiamar; M Ridwan; M. Asrurifak; Masyhur Irsyam
Jurnal Jalan-Jembatan Vol 27 No 3 (2010)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Earthquake resistant infrastructure planning, generally require the acceleration data at ground level. Currently, the American Society of Civil (ASCE) 07-2010 provides amplification factor for earthquake resistant building design needs so that planners can get the acceleration of the surface by multiplying the value of the accelaration of Infonsesian Earthquake Maps 2010 with the amplification factor. To evaluate the amplification facttor with the seismic hazard analysis using software USGS PSHA-07, evaluation using grid analysis in Sumatra was done using variations of shear wave velocity(VS) which represents the ASCE 07-10 sites classification for very dense soil and soft rock (SC), the soil medium (SD) and soft soil (SE). According to the amplification factor comparison between analysis result and the ASCE 07-2010 at two reviewed period (PGA and 0.2 sec), the SC and SD site result show a close amplification factor to ASCE 07-2010. While large deviation occur between analysis and ASCE 07-2010 at SE site and period T = 1sec with VS30 < 175m/sec. The large deviation probably caused by modeling limitation which only can used specified attenuation function that represent fault zone only. To gain the good quality amplification factor, it is advice to do specific dynamic reponse analysis using local soil condition according to ASCE-07-2010 classification. Keyword : Seismic hazard analysis, amplification factor, peak surface acceleration, surface spectrum response.
Evaluation of Empirical Formulas to Estimate Axial Capacity of Bored Pile in West Java, Indonesia Laura Naomi Roniar; Cevin Hartanto; Masyhur Irsyam; Yuamar Imarrazan Basarah; Tony Budianto Sihite
Indonesian Geotechnical Journal Vol. 2 No. 3 (2023): Vol. 2, No. 3, December 2023
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56144/igj.v2i3.62

Abstract

Pile foundation is part of the substructure that plays an important role in carrying and supporting the load acting on it. Therefore, a proper foundation design by estimating the bearing capacity of pile foundation is needed to ensure the safety of the building foundation. To achieve better estimation of pile capacity, analysis of the axial bearing capacity should be verified by pile test results such as Static Loading Test or dynamic test with a Pile Driving Analyzer. Based on the pile test data, the values of the skin friction and end bearing resistance can be back calculated, and hence it can be used in the calculation of pile bearing capacity using empirical methods. In this study, bearing capacity analysis was performed for drilled pile foundations, which had been tested using Static Loading Test and Pile Driving Analyzer. The analysis was carried out by comparing the results of empirical calculations for each test pile with the results of field tests. The calculation results were then compared to the empirical adhesion factor (alpha) method, which is commonly used by practicing engineers in Indonesia, according to the methods proposed by Kulhawy (1984), Reese & Wright (1977), and Reese & O'Neil (1988). Based on the 104 test piles data, the results are more in good agreement with the adhesion factor proposed by Kulhawy (1984) with a correlation of undrained shear strength, cu of 8 NSPT, a correlation of unit skin friction for sandy soils of 2.2 NSPT, and a correlation of unit end bearing for sandy soils of 70 NSPT-ave.
Variability of N-SPT-Correlated Undrained Shear Strength of Alluvial Deposit in Doplang Region, Central Java, Indonesia Sugeng Krisnanto; Masyhur Irsyam; Rendy Dwi Kartiko; Arif Rahman Hakim Sitepu; Mohammad Anwar Fathoni; Ina Asha Nurjanah; Shafira Annisa Putri; Lindawati Lindawati; Maudy Anisa Fanani; Alexander Wicaksono Budiarto; Idrus Muhammad Alatas
Journal of Engineering and Technological Sciences Vol. 55 No. 6 (2023)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2023.55.6.3

Abstract

The need to better quantify the variability of soil shear strength and its relations with the factor of safety is increasing in Indonesia. However, this aspect has not yet been studied thoroughly. This paper presents an attempt to quantify the variability of undrained shear strength in relation with the factor of safety of an alluvial deposit in the Doplang region, Central Java, Indonesia. A relationship between the undrained shear strength, su, and N-SPT for the deposit was found as su = 3.4 N-SPT. The variability of the undrained shear strength was quantified utilizing the coefficient of variance, s/m (the sample standard deviation, s over the mean, m) of the N-SPT correlated undrained shear strength. The variability of the undrained shear strength was investigated for the soil near ground surface. The deposit had a value of s/m ranging from 0.15 to 0.25 near ground surface. The variation of s/m tended to follow normal and lognormal distributions. Relationships among the coefficient of variance, the probability of failure, and the factor of safety in terms of soil strength for normal and lognormal distributions were developed. For the value of s/m near ground surface, the relationship between the probability of failure and factor of safety was obtained.
Comparative Study of Seismic Hazard Analysis Using Classical PSHA and PSHA Method in Java Island, Indonesia Goro , Garup Lambang; Irsyam, Masyhur; Meilano, Irwan; Asrurifak, M.
Indonesian Journal on Geoscience Vol. 11 No. 3 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.3.349-363

Abstract

In general, seismic hazard analysis is conducted using a probabilistic approach (PSHA), whilst seismic risk analysis is computed using a stochastic approach. To figur out more differences between the two methods, a comparative study of those two approaches needs to be conducted. The study was conducted in Java Island which is the most populated island in Indonesia, and prone to earthquakes, particularly in the southern part due to the subduction of the Australian Plate and many active shallow faults along the island. To find out whether the hazards occurred in the risk analysis were closer to the results of Classical PSHA, it is necessary to examine the comparison of the two methods. The difference between the Event-Based and Classical methods is the use of a synthetic catalog that depends on the input value of SES (Stochastic Event Set). The research began with hazard computation with both methods, where the Event-Based PSHA method was given varying SES values. Determining the SES value in the Event-Based method is an important stage to conduct as a significant input parameter in a risk analysis, particularly the loss analysis. The comparison results conclude that the Event-Based PSHA with SES= 200,000 produced a wellconfirmed hazard map compared to the Classical PSHA result with the smallest standard deviation and variation, i.e. 0.0172 and 0.0003 respectively.
Fully Automated Ground Motion Selection Platform Considering Multiple Seismic Source Contributions for Seismic Evaluation of Existing Buildings in Indonesia Alexander, Nick; Irsyam, Masyhur; Asrurifak, Muhammad; Hendriyawan, Hendriyawan; Faizal, Lutfi
Journal of Engineering and Technological Sciences Vol. 57 No. 3 (2025): Vol. 57 No. 3 (2025): June
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.3.5

Abstract

Buildings throughout Indonesia are at risk of experiencing damaging earthquake events from multiple sources within shallow crustal and subduction zones. Seismic assessments per SNI 9273: 2024 require earthquake acceleration time series, but a public web-based platform that can facilitate this need was not yet available. Thereby, it became urgent to investigate the possibility of developing an automated engineering tool that can determine hazard-consistent ground motion set with good target-match accuracy for regions where multiple seismic source contribution is prevalent. The investigation was conducted through the development of a fully-automated ground motion selection and scaling platform specifically customized to facilitate the seismic evaluation and retrofit of existing buildings throughout Indonesia, limited to upper bound period range of 3 s. This platform has been officially launched for public access by the Indonesian Ministry of Public Works to enhance the efficiency and accuracy of seismic assessments with the broader goal of improving seismic safety. Completion and test case validation of the platform confirmed that such useful tool can be developed provided that the following key features are incorporated: (1) specifically-defined scope of application; (2) comprehensive data integration to consider multiple seismic source contribution; and (3) modified greedy selection algorithm to enhance target-match accuracy
Seismic Vulnerability of Semarang, Indonesia for Shallow Crustal Fault Earthquake Partono, Windu; Irsyam, Masyhur; Asrurifak, Muhammad; Sari, Undayani Cita; Victor, Victor
Indonesian Journal of Geography Vol 57, No 1 (2025): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.95057

Abstract

In 2017, the National Centre for Earthquake Studies of Indonesia released the distribution of 25 shallow crustal fault lines throughout the island of Java in Indonesia and four of them (Semarang, Demak, Rawapening and Weleri fault lines) are located around the city of Semarang. The presence of four shallow crustal fault earthquake sources, has led to the need to understand the potential earthquake hazards of Semarang through the development of earthquake-microzoning maps. Earthquake-microzoning maps of Semarang should be developed with reference to the Indonesian earthquake hazard maps and based on the deterministic and probabilistic seismic hazard approaches. Through the development of earthquake-microzoning maps, it is possible to estimate the areas with the highest and lowest surface-shaking (peak ground acceleration). The earthquake-microzoning maps based on the Semarang and Demak fault earthquake scenarios provide a preliminary indication that buildings constructed using the Indonesian Seismic Code (SNI 1726:2002) will experience stronger surface-shaking if the earthquake magnitude from both sources is at least M5.5. The results of the analysis for the creation of earthquake-microzoning maps based on the Rawapening and Weleri fault earthquake scenarios provide a preliminary indication that buildings constructed using SNI 1726:2002 are expected to experience slightly weaker ground-shaking if the earthquake magnitude from both sources reaches a maximum of M6.5. All buildings constructed in this area using SNI 1726:2012 and SNI 1726:2019 are expected to experience weaker surface-shaking due to the four earthquake source scenarios with a maximum magnitude of M6.5.
Pengembangan Peta Percepatan Gerakan Tanah Puncak Kota Semarang Berdasarkan Peraturan Gempa Tahun 2019 Partono, Windu; Irsyam, Masyhur; Nazir, Ramli; Asrurifak, Muhammad; Kistiani, Frida; Sari, Undayani Cita
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (931.596 KB) | DOI: 10.14710/mkts.v27i2.40714

Abstract

Surface peak ground acceleration (PGAM) needs for seismic forces of basement and retaining structures design.  The PGAM value can be calculated using bedrock peak ground acceleration (MCEG) and multiplied it with site coefficient FPGA. For building design purposes, the MCEG value can be calculated based on the combination of DSHA (Deterministic Seismic Hazard Analysis) and PSHA (Probabilistic Seismic Hazard Analysis). Compared to the previous 2012 website response spectrum design which is displayed the PGAM value, only MCEG value at site position can be obtained from the new 2021 response spectrum design website. This paper describes the development of PGAM distribution of Semarang using Visual Basic programming language software. The distribution of DSHA and PSHA (2500 return periods) combination analysis for developing MCEG value also describes in this paper. The analysis was performed based on the earthquake record data from 1900 to 2016. The PGAM analysis was performed at 203 soil boring investigation positions and using FPGA site coefficients of SNI 1726:2019. The minimum and maximum PGAM distribution values at the study area are in between 0.45 through 0.55 g and the maximum PGAM is distributed at the northern part of the study area.
Co-Authors -, Asrurifak . Hendriyawan ACHMAD FAUZI Afnimar Agus Himawan Alexander Wicaksono Budiarto Alexander, Nick Andhika Sahadewa Andika Sahadewa Anggun Mayang Sari Arifan Jaya Syahbana Asrurifak - Asrurifak, Mohammad Asrurifak, Muhammad Asrurifak, Muhammad Atyanto Boesono Atyanto Boesono, Atyanto Berny A. Subki Bigman Hutapea Bigman M Hutapea Bigman M. Hutapea Bigman M. Hutapea Bigman Marihat Hutapea Cevin Hartanto Chintya Meidina Azwar Dandung Sri Harninto Delfebriyadi Delfebriyadi, Delfebriyadi Donny T. Dangkua Donny T. Dangkua Dyah Kusumastuti Endra Susila Engkon K. Kertapati Engkon K. Kertapati F. X. Toha Fahmi Aldiamar Fahmi Aldiamar Fahmi Aldiamar, Fahmi Faizal, Lutfi Frida Kistiani FX Toha Goro , Garup Lambang Hadi Suntoko Helmy Darjanto Hendriawan Hendriawan Hendriawan, Hendriawan Hiroaki Yamanaka Hutapea, Bigman M Hutapea, Bigman M. Hutapea, Bigman Marihat I Nyoman Sukanta, I Nyoman I Wayan Sengara I Wayan Sengara, I Wayan Idrus Muhammad Alatas In In Wahdiny Ina Asha Nurjanah Indra Djati Sidi irwan meilano Iswandi Imran Kartiko, Rendy Dwi L.L. Makrup L.L. Makrup, L.L. Lastiasih, Yudhi Laura Naomi Roniar Lindawati Lindawati Lindung Zalbuin Mase, Lindung Zalbuin M Ridwan M. Asrurifak M. Asrurifak, M. M. Ridwan M. Syamsul Maarif Maudy Anisa Fanani Mikhail, Reguel Mikhail, Reguel Misliniyati, Rena Mohamad Ridwan Mohammad Anwar Fathoni Mohammad Asrurifak Muhammad Asrurifak Muhammad Asrurifak Muhammad Asrurifak Muhammad Asrurifak, Muhammad Munirwansyah Munirwansyah Munirwansyah Munirwansyah Munirwansyah Munirwansyah Nazir, Ramli Nazir, Ramli R. Bambang Boediono Ramli Nazir Ramli Nazir Reguel Mikhail Reguel Mikhail Rena Misliniyati Rena Misliniyati Sahadewa, Andika Shafira Annisa Putri Siska Rustiani Sitepu, Arif Rahman Hakim Soebagyo Soebagyo Soebagyo Soebagyo Sri Harninto, Dandung Sri Prabandiyani R.W Sri Prabandiyani R.W. Sri Prabandiyani Retno W Sri Widiyantoro Sugeng Krisnanto Suhendra, Andryan Tommy Ilyas Tony Budianto Sihite Undayani Cita Sari Usama Juniansyah Fauzi Victor Victor Wahdiny, In In Widjojo A. Prakoso, Widjojo Windu Partono Yuamar Imarrazan Basarah