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论文类型：期刊论文

发表时间：2013-04-01

发表刊物：ADVANCES IN STRUCTURAL ENGINEERING

收录刊物：SCIE、EI、Scopus

卷号：16

期号：4

页面范围：605-618

ISSN号：1369-4332

关键字：damage detection; earthquake excitation; seismic monitoring; vibration; statistical algorithm

摘要：The problem of detecting structural damage by exploiting vibration signal measurements produced from earthquake excitation is addressed in this work. Following the Wenchuan earthquake of 12 May 2008, a residential masonry building was selected for instrumentation with accelerometers by the Harbin Institute of Technology. This building had been damaged in the Wenchuan earthquake. It represents a rare case of an instrumented building that has been previously damaged, thus serving as a full-scale benchmark model to evaluate structural identification and damage detection methods. More than 20 earthquakes were recorded by the system after the building was instrumented. For detecting the structural damage, a vibration-based damage detection algorithm for structures under earthquake excitation is introduced in this paper. This method is based on a residual associated with subspace-based modal identification, with global chi(2)-tests built on this residual. This method makes effective use of non-stationary and limited duration earthquake excitation, handles the uncertainties, and further detects the structural damage. The results obtained from these structural responses and earthquake excitations are reported using both identification and damage detection methods.