Functional Seismic Resilience of Reinforced Concrete Building Conforming to Indian Standards

Functionality and recovery are important resilience attributes but not considered in existing building design and assessment approaches. The study presents different resilience-based metrics based on probabilistic seismic resilience assessment of an archetypical IS code-conforming reinforced concrete building to gain insight in their repair cost, functionality, and recovery performance. This study uses the performance-based earthquake engineering framework. Assessments are conducted for several intensities ranging from return periods of 50 to 9975 years. The results reveal that the IS code-conforming building meets collapse prevention and life-safety objectives. However, time for reoccupancy after a design-level event is about 13 days, while it takes 6 months for functional recovery which may not be acceptable for critical buildings. The study shows that including functionality and recovery-based objectives is essential for design of such buildings.