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Pengembangan Peta Percepatan Gerakan Tanah Puncak Kota Semarang Berdasarkan Peraturan Gempa Tahun 2019

Development of Peak Ground Acceleration Map of Semarang Based on Indonesian Seismic Code 2019

*Windu Partono scopus  -  Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Indonesia
Masyhur Irsyam  -  Institut Teknologi Bandung, Indonesia
Ramli Nazir  -  Universiti Teknologi Malaysia, Malaysia
Muhammad Asrurifak  -  Institut Sains dan Teknologi Nasional, Indonesia
Frida Kistiani  -  Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Indonesia
Undayani Cita Sari  -  Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Indonesia

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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.

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Keywords: DSHA; FPGA; MCEG; PGAM; PSHA
Funding: Direktorat Riset dan Pengabdian Masyarakat, Deputi Bidang Penguatan Riset dan Pembangunan, Kementerian Riset dan Teknologi / Badan Riset dan Inovasi Nasional

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