Abstract
In Indonesia, infrastructure, such as port facilities, has been damaged by earthquakes. Therefore, evaluating rational earthquake ground motions (EGMs) for seismic design is necessary to mitigate earthquake disasters in the future. The EGMs in the Indonesian Seismic Code are stipulated based on the ASCE standards and not on site-specific ones. This study aims to propose site-specific EGMs for the seismic design of port facilities in Indonesia. The EGM records and ground data in Indonesia were used for analysis. The EGM incidents in the bedrock were evaluated with deconvolution analysis. The obtained EGMs were amplitude-adjusted to peak ground acceleration similar to that of the EGMs in the bedrock in the Indonesian Seismic Code. A seismic response analysis considering nonlinear soil characteristics was conducted, and 144 EGMs at port sites were obtained. Considering the variation in the obtained EGMs, we propose site-specific EGMs for the seismic design of port facilities. A comparison of the proposed EGMs with those in the design code reveals that the difference between them is significant.
Highlights
Indonesia is an earthquake-prone country, and Sumatra is one of its high-seismicity regions
We provide a brief overview of how earthquake ground motions (EGMs) for seismic design are set up in the SNI
The effects of the shallow subsurfaces must be rethus, they cannot be used for the seismic design of port facilities by adjusting the moved by a seismic response analysis, and the incidents in the bedrock must be amplitudes of the observed EGMs
Summary
Indonesia is an earthquake-prone country, and Sumatra is one of its high-seismicity regions. Indonesia’s infrastructure (e.g., port facilities) has been damaged by earthquakes, such as the Sumatra–Andaman Islands earthquake in 2004 [2], the South Sumatra earthquake in. Port facilities are installed on soft soils in coastal areas; they are vulnerable to earthquakes. Earthquakes that occurred in other areas, such as the 1995 Kobe earthquake [6], the 1999 Kocaeli earthquake [7], and the 2020 Samos earthquake [8], caused severe damage to port facilities and led to the stagnation of the social economy. Evaluating the rational earthquake ground motions (EGMs) for seismic design is necessary to mitigate seismic disasters in high-seismicity countries, such as Indonesia. The seismic design code applied to port facilities in Indonesia is SNI 1726:2019, “Seismic Design
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