Site-Specific Seismic Analyses for Deep Stiff Clay: Jakarta Site, Indonesia

This paper presents a site-specific seismic analysis for a multi-high rise project in West Jakarta, Indonesia, where subsurface soils mostly consist of stiff clay and alluvial deposits up to 260 m deep. The latest seismic ground motion prediction equations were employed to develop design ground motions using a probabilistic seismic hazard analysis (PSHA) approach. Selection of appropriate design earthquake acceleration time histories and treating the variations of subsurface soils using all available soil data were pivotal to developing the most reliable site response analyses using combination of equivalent linear (SHAKE) and fully non-linear (D-MOD) programs. The design elastic response spectrum was generated not only based upon the results of site response alone, but also using the latest empirical (seismological) approaches, where the actual site amplification of recorded motions from worldwide data on similar soil conditions was considered.