Component-Level Seismic Performance Assessment of Instrumented Super High-Rise Buildings under Bidirectional Long-Period Ground Motions

Abstract

A detailed seismic performance assessment for super high-rise buildings is essential for decision-making on postearthquake repair, maintenance, and reoccupation. This paper proposes a probabilistic assessment framework for instrumented super high-rise buildings under bidirectional long-period ground motions in which the probabilities of key structural components experiencing different damage levels are assessed. The fragility curves of the key structural components are obtained by performing a nonlinear incremental dynamic analysis on the building model. The evolving mean values and variances of the structural responses are determined by using the Kalman smoothing algorithm based on the integrated optimal sensor placement and response reconstruction scheme. The extreme value distribution of the structural responses is obtained in terms of the Vanmarcke approximation and then incorporated with generated fragility curves to yield an estimation of the probabilistic damage states of the key structural components. The proposed framework is finally applied to a real super high-rise building, and the results manifest that the proposed framework provides a reliable way of estimating the safety and operability levels of the instrumented building after the earthquake event.