Response and damage assessment of RC frame structures in singapore to distant Sumatran earthquake

This paper studies the dynamic response and damage of non-ductile RC frames on soft soil sites in Singapore subjected to a M-w 9.0 epicentral distance 550 km earthquake occurring in the subduction zone in Sumatra, Indonesia. Time history analysis of structural responses is carried out. Input ground motion time histories are simulated probabilistically by including the effects of random variations of both source and local site properties. 95-percentile confidence level ground motions on soil surface are used as input. Soil-structure interaction effects are included in the analysis. Structural damage is evaluated by the inter storey drifts. It is found that under such an earthquake, high-rise buildings sited on soil sites will suffer severe damage.