A new approach to structural seismic responses in Mataram City: Based on the Probabilistic Seismic Hazard Analysis (PSHA) results obtained after Lombok earthquakes 2018

Document Type : Article


Department of Civil Engineering , University of Mataram, Jl. Majapahit 62 Mataram, 83125, Indonesia


In the last few years, several major earthquakes in Indonesia have prompted an update of the building seismic resistance code. SNI 1726-2019 is the newest Indonesia seismic code. However, the change of PSHA results due to the 2018 Lombok Earthquake has not been accommodated in this code because it adopts the 2017 seismic maps from National Center for Earthquakes Studies. This paper studied spectral acceleration parameters according to the previous seismic codes (SNI 1976-2012) and current seismic code (SNI 1976-2019) and the PSHA results obtained after the Lombok earthquakes in 2018.The spectral accelerations were applied to a building structure located in Mataram City to analyze the seismic building responses. The results indicate that the seismic parameters of the PSHA result obtained after Lombok earthquakes lead to higher seismic demands structures than the codes either SNI 1726- 2012 or SNI 1726- 2019, especially for structures located in medium soil type. The current code needs to be immediate improved for the sake of earthquake mitigation resilience in this area.


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