A structural performance evaluation of vertical housing model due to the increased seismic loads in Semarang, Indonesia using a pushover analysis

The substantial increase in design response spectrum is resulted from the Indonesian seismic regulation changes, which occur in Semarang as well, either for hard, medium or soft site class. The increased design response spectrum is linear to the increased seismic loads, which may influence the structural performance of buildings in Semarang. We have conducted a study on the influence of increased seismic loads on the performance of an irregular ten-story vertical housing model of medium site class in Semarang, Indonesia. The study is conducted using a pushover analysis. We find that the increased seismic loads in Semarang has resulted in the increased base shear force and structural drift of the analysed vertical housing model. The base shear force increases by 68.96% in X direction and 66.63% in Y direction, while the structural drift ratio increases by 81.25% in X direction and 82.64% in Y direction. However, the structural performance remains at Immediate Occupancy, which refers to a condition of post-earthquake damage where the building is still regarded as safe to live in