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STRUCTURAL DAMAGE DETECTION BY USING MODAL DATA AND WAVE PROPAGATION

机译:利用模态数据和波传播检测结构损伤

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摘要

Demand for monitoring systems applied to structures for quality assurance and for evaluating seismic risk is stronger than ever. Here, a monitoring systems to assess structural integrity was developed in which the damage-detection strategy uses two newly developed methods to first identify the damage sites globally (i.e., detect whether the damage occurred or not, and detect the story level) and to then evaluate the damage sites locally. One method identifies the sites and extent of damage globally by using an improved MDLAC (Multiple Damage Location Assurance Criterion) method by using modal data (i.e., frequency and mode shape), and the other identifies the damage sites locally by using wave propagation. Results showed that these two methods are practical and effective in assessing structural integrity of a structure for seismic safety.
机译:对用于结构保证质量和评估地震风险的监控系统的需求比以往任何时候都更加强烈。在这里,开发了一种用于评估结构完整性的监视系统,其中,损坏检测策略使用两种新开发的方法来首先在全球范围内识别损坏位置(即,检测是否发生损坏,并检测层级),然后在当地评估损坏地点。一种方法是通过使用模态数据(即频率和模式形状)使用改进的MDLAC(多损伤位置保证标准)方法来全局识别损坏的位置和范围,另一种方法是通过波传播来局部识别损坏的位置。结果表明,这两种方法在评估用于地震安全的结构的结构完整性方面都是实用且有效的。

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