Seismic Hazard Analysis Study of New Semarang International Airport Due to Shallow Crustal Fault Earthquake Scenario

Abstract

Ahmad Yani International Airport is located in Semarang (the Capital City of Central Java Province) Indonesia. The airport was first operated on June 6 2018 and designed it using 2012 Indonesian Seismic Code (SNI 1726:2012 in Seismic resistance design codes for building and other structures, Jakarta, pp 1–138, [16]). The airport was commercially operated one year after the new Indonesian Seismic Hazard Maps 2017 released (ISHM-2017). The most important information obtained from ISHM-2017 is the new predicted seismic source located close to the airport area. This paper expresses the seismic hazard analysis (SHA) of the airport area based on the new ISHM-2017. The analysis is performed by conducting three basic SHA steps such as the Probabilistic and Deterministic Seismic Hazard Analysis (PSHA and DSHA), a combination of PSHA and DSHA for developing Most Considered Earthquake Risk (MCER) spectral acceleration and the final analysis is related with the calculation of surface spectral acceleration for developing design spectral acceleration (DSA). The new DSA is then compared to the previous DSA developed based on SNI 1726:2012 (SNI 1726:2012 in Seismic resistance design codes for building and other structures, Jakarta, pp 1–138, [16]) and also compared to the surface spectral acceleration developed using site response analysis (SRA). The result of the study shows that the new DSA has no significant differences and improvements compared to the previous DSA (SNI 1726:2012 in Seismic resistance design codes for building and other structures, Jakarta, pp 1–138, [16]) and SRA results.