Structural Damage and Ground Motion Characteristics of the 2015 Sabah Earthquake
摘要
Ground motion varies across locations based on local soil conditions. Following a 6.0 magnitude earthquake that struck Ranau and Kundasang in 2015, various damages were observed. A microtremor instrument was employed to measure the predominant period, frequency, and amplification level at 42 observation points in Ranau and Kundasang. These measurements enabled the establishment of microzonation maps for the study areas. The damages that occurred post-earthquake within these areas were identified, compiled, and documented. From the results, Kundasang’s predominant period ranges from 0.34 s to 0.72 s, with a predominant frequency between 1.39 Hz and 2.92 Hz. The amplification level in Kundasang spans from 1.86 to 7.75. In contrast, Ranau’s predominant periods range from 0.25 s to 0.57 s, with a predominant frequency between 1.74 Hz and 4.03 Hz. The amplification level in Ranau falls between 1.75 and 6.20. A total of 22 damaged sites were documented, with damage types categorized as structural damage, non-structural damage, ground failure, and damage caused by falling objects.