International high-frequency base balance benchmark study

A summary of the main results from an international comparative study for the high-frequency base balance is given. Two buildings were specified – a \"basic\" and an \"advanced\" building. The latter had more complex dynamic response with coupled modes of vibration. The predicted base moments generally showed good agreement amongst the participating groups, but less good agreement was found for the roof accelerations which are dominated by the resonant response, and subject to measurement errors for the generalized force spectra, to varying mode shape correction techniques, and different methods used for combining acceleration components.