Effect of roof garden weight on the seismic fragility of relatively tall concrete wall buildings

In line with rapid urbanization and the urgent need for the development of Malaysia, the number of tall buildings in this country has increased drastically over the past decades. However, most of the existing structures have not been designed for earthquake resistance. Therefore, this study focused on the analytical derivation of seismic fragility curves for concrete wall buildings with a roof garden. Two 25-story residential high-rise buildings with a similar architectural plan and number of stories but with different parking levels were subjected to 15 far-field earthquake records. Pushover and incremental dynamic analyses were employed to estimate the inter-story drift capacities and demands. A comparison between the results obtained from this study and those presented by other researchers showed that the additional mass of the roof garden significantly increased the probability of collapse; however, it had an insignificant impact on the probability of exceeding minor damage.