Mapping the Level of Earthquake Risk of Holtekamp Bridge at Jayapura Based on Earthquake Data and Microtremor Measurement

Doodle Dandy Waromi, Nur Khoirullah, Dicky Muslim, Agung Mulyo

Abstract


Holtekamp bridge which is located in Jayapura region between Hamadi and Holtekamp Village in
the Northern part of Papua island. The region constitutes an active earthquake zone with the
recurrence frequency and magnitude of the earthquake are relatively high. The region is located
on an active fault zone. The seismotectonics setting in this region is directly implied to the
calculations of the seismic design for engineering and design purposes on building and non-building
structures including Holtekamp bridge in Jayapura city. To recognize a characteristic of the
earthquake at the site of interest, the historical earthquakes (background) data surrounding the
study area. Local microtremor measurements data are analyzed by means of a probabilistic
seismic hazard analysis (PSHA). Deterministic seismic hazard analysis (DSHA) using some
ground-motion models in attenuation relationship equations. In resulting of seismic hazard
parameter as represented by peak ground acceleration (PGA), values in earthquake scenario at
operating basis earthquake (OBE), maximum design earthquake (MDE), and maximum credible
earthquake (MCE) conditions. These values are used as a reference to evaluate the compliance
of the current technical aspects with the new required design facing the updated seismicity
parameters.
Keyword : Jayapura, Holtekamp, seismic Hazard Analysis, Peak Ground Acceleration.


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DOI: https://doi.org/10.24198/gsag.v2i5.20321

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