Application of Bangkok 3D Geological Model for Seismic Site Response Analysis
Keywords:
3D geological model, Tarlay earthquake, Non-linear site response analysis, Bangkok subsoilAbstract
This paper presents the results of seismic site response analysis of Bangkok subsoil by applying a 3D geological model of Bangkok. The study is based on the assumption that the thickness of soft soil layer can influence the seismic ground response. 1D non-linear ground response analyses are performed with an input of actual ground motion used to happen in Thailand. The shear wave velocities of ground are calculated based on correlations from undrained shear strength and SPT-N value. The results show the peak ground acceleration and spectral acceleration of Bangkok subsoil from Tarlay earthquake. This study shows that Bangkok soft soils have influence on ground amplification factor. The increasing of soft soil thickness affects to the increasing of amplification factor.
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