首页> 外文期刊>International journal of structural stability and dynamics >APPLICATION OF THE BASELINE STIFFNESS METHOD FOR DAMAGE DETECTION OF AN RC BUILDING WITHOUT BASELINE MODAL PARAMETERS UTILIZING THE INDEPENDENT COMPONENT ANALYSIS FOR MODAL EXTRACTION
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APPLICATION OF THE BASELINE STIFFNESS METHOD FOR DAMAGE DETECTION OF AN RC BUILDING WITHOUT BASELINE MODAL PARAMETERS UTILIZING THE INDEPENDENT COMPONENT ANALYSIS FOR MODAL EXTRACTION

机译:基线刚度方法在模态提取独立分量分析中无基线模态参数的钢筋混凝土建筑物损伤检测中的应用

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摘要

In this paper, a damage detection study is presented for a seven-story concrete building. This structure was affected by the 1994 Northridge earthquake. Acceleration signals of the damaged system are processed utilizing both the Independent Component Analysis and the Frequency Domain Decomposition Method to extract modal parameters. Utilizing solely these parameters from the damaged structure and the approximate undamaged lateral stiffness of the first storey, a pre-damage state is determined. Damage assessment is achieved by the Baseline Stiffness Method and comparing the computed undamaged state of the building and the damaged one to detect loss of stiffness on each element of the structure. Advantages of the proposed methods are discussed to demonstrate the feasibility of the methodology to extract modal parameters and to identify structural damage in buildings without baseline modal information.
机译:在本文中,对七层混凝土建筑进行了损伤检测研究。该结构受到1994年Northridge地震的影响。利用独立分量分析和频域分解方法处理受损系统的加速度信号,以提取模态参数。仅使用损坏的结构中的这些参数以及第一层的大致未损坏的侧向刚度,即可确定损坏前的状态。损伤评估是通过“基线刚度方法”进行的,并将计算出的建筑物的未损坏状态与受损状态进行比较,以检测结构各元素的刚度损失。讨论了所提出方法的优势,以证明该方法可提取模态参数并在没有基准模态信息的情况下识别建筑物中的结构破坏的可行性。

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