Comparison of the RSNI 1726:2018 and the SNI 1726:2012 design response spectra of 17 major cities in Indonesia

Based on the 2017 Indonesian Seismic Map and the ASCE 7-16, the proposed Indonesian Seismic Design Code - RSNI 1726:2018, was developed to renew the current SNI 1726:2012 code. Taking a sampling of 17 major cities representing all regions in Indonesia, this paper presents the comparison of the RSNI 1726:2018 and the SNI 1726:2012 design response spectra. All cities located in high seismic areas have an anomaly characteristic, where the design response spectra of site class SE (soft soil) is less than that of site class SD (medium soil), or even less than that of site class SC (hard soil), contrary to what Structural and Geotechnical Engineers think so far, that the design response spectra of site class SE is always higher than that of site classes SD and SC. (paper)