Post‐earthquake system identification and response estimation of an elastic compound building using a simplified numerical model

Abstract

The post-earthquake system identification and response estimation of an elastic 13-story compound building during four seismic events were effectively conducted using a simplified numerical model: the generalized building model (GBM). The compound building examined was the recently remolded office building of Taiwan's National Center for Research on Earthquake Engineering. The 7–13th stories of the building are extended steel structures seated atop six older reinforced-concrete stories. In addition to the vertical extension, the building was horizontally extended. The extension incorporated several types of seismic dampers. The GBM, which reflects the dynamic characteristics of the elastic compound building, was constructed using only the acceleration records of the roof and the 7th story. The effectiveness of the GBM was then verified by comparing the estimated and actual acceleration responses of the other stories. From the verified GBM, the modal parameters and drift responses of the compound building were estimated accordingly.