On the Selection of Ground-Motion Prediction Equations Compatible with Peninsular Malaysia Region for Sumatran Subduction In-Slab Earthquakes

摘要

Although Peninsular Malaysia is located in a low-seismicity region, the medium to high rise structures could be vulnerable to distant earthquakes generated by Sumatran fault and Sumatran subduction seismic sources. In addition, seismic design has not been specifically considered in the building design codes of the region. Therefore, it is rational to assess the seismic hazard of the region to apply appropriate seismic designs for the existing and future structures. The most comprehensive method recommended by design codes is Probabilistic method in order to do Seismic Hazard Analysis (i.e. called PSHA). The key component required in any seismic hazard analysis is employing an appropriated set of Ground-Motion Prediction Equations (GMPEs). This paper has attempted firstly to drive new GMPE for Peak Ground Acceleration (PGA) using data recorded in Peninsular Malaysia due to Sumatran subduction in-slab earthquakes. Secondly, the study has presenteda classification among the new derived GMPE and other four GMPEs proposed for subduction in-slab earthquakes of different regions through a comparative study based on the PGAs recorded in Peninsular Malaysia. The goal of the classification was to introduce the GMPEs which were the most compatible with the region. The results of the present study are applicable for seismic hazard analysis in Peninsular Malaysia.