Sensitivity of Earthquake Input Motion correlation with Arias Intensity and Amplification, Case Study: Yogyakarta Special Region Arifan Jaya Syahbana(a,b*), Anggun Mayang Sari(b), Eko Soebowo(b)
a) Department of Civil Engineering, Bandung Institute of Technology, Bandung, Indonesia
arifanjaya[at]s.itb.ac.id
b) Geotechnology Research Center, Indonesian Institute of Sciences, Bandung, Indonesia
Abstract
Earthquake problems are a hot topic that is being discussed in the scientific and academic world, one of them is parameter sensitivity. In this study, the sensitivity level of earthquake input motion in bedrock will be encorrelated with intensity arias and amplification occurring at surface. The location of the study selected is an earthquake prone area with the last record of a major earthquake in 2006, Yogyakarta Special Region. The areas to be analysed are 3 (three) points with different geological environments. Testing is conducted by: (1) declustering and completeness analysis of earthquake catalogue (2) deagregation (3) selection of motion input and (4) wave propagation analysis to obtain graph of arias intensity and amplification value. These steps are aided by Zmap and DeepSoil software. The expected result in this study is the quantification of the input motion sensitivity in each geological environment based on amplification value and arias intensity. The softer the local geology environment the higher the amplification value and the effective time on arias intesity will increase.
