3. Evaluation of a Four‐Story Reinforccd Concrete Building Damaged during the Northridge Earthquake

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Abstract
A four‐story reinforced concrete (RC) frame structure damaged during the Northridge Earthquake was evaluated to determine if punching shear failures that occurred at interior slab‐column connections could be post‐calculated using analytical methods. The building was evaluated using: 1) a code level strength analysis, 2) a static nonlinear (“pushover”) analysis, and 3) a dynamic nonlinear response analysis using ground motions recorded within 1 km (0.6 mi.) of the building. Based on design material properties and field observations, both the static and dynamic nonlinear analyses were able to successfully post‐calculate the observed punching shear failures.