Long-term building safety assessment from a series of earthquake excitations
Journal
Earthquake Engineering and Structural Dynamics
Date Issued
2024-01-01
Author(s)
Abstract
Structural health monitoring is conducted to ensure the structural integrity of a building during earthquakes. This study aimed to improve our understanding of the dynamic response of buildings subjected to a series of earthquake excitations, focusing on interpreting structural dynamic characteristics and identifying potential seismic damage subjected to a series of earthquake excitations. To this end, a series of seismic response data of a 13-story reinforced-concrete/steel building were collected through long-term monitoring over 2 years. A systematic approach for monitoring the health of the building was established by integrating several algorithms for vibration-based (both output-only and input–output parametric nonparametric feature-discrimination algorithms) and model-based feature extraction techniques. Furthermore, the time-varying dynamic characteristics of the building were determined, including its modal frequency, mode shape, and stiffness, as extracted from features obtained over the monitoring period of 2 years. Safety assessment of this newly compound high-rise building is investigated to explore the system dynamic characteristics through long-term seismic monitoring.
Subjects
building seismic response | principal component analysis | recursive subspace identification | stochastic subspace identification | time-frequency analysis of signal
Type
journal article