Abstract
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.
Highlights
Earthquakes are unpredictable in terms of time and location
The objective of this study is to evaluate the performance of an irregular 10-story vertical housing structure model in Semarang due to the result of the increased seismic load caused by the Indonesian seismic regulation changes
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
Summary
Earthquakes are unpredictable in terms of time and location. Earthquakes may cause damage to buildings and result in fatalities [1]. Any change in the seismic intensity requires a change in the regulation of seismic design for building due to the result of increased design response spectrum for all site classes throughout Indonesia. This regulation change has caused researchers to conduct many studies regarding the influence of regulation change on the existing seismic force and its impact on building structural performance.
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