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Estimation of story drift directly from acceleration records for post-earthquake safety evaluations of buildings

机译：估计故事漂移直接从地震后地震安全性评估建筑物的加速记录

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摘要

Story and roof drift ratios play a key role in the assessment of the structural damage of a building if structural displacement can be measured or calculated. In general, for building seismic monitoring, accelerometers are used to compile the responses for analysis instead of using displacement meters because they are more cost effective. Therefore, an accurate estimate of the displacement response of a building using acceleration measurements will be helpful for the rapid assessment of the damage to its structure after an earthquake. In this study, the combination of an algorithm with singular spectrum analysis (SSA) and an integration scheme is proposed to estimate structural displacement directly from acceleration measurements. The SSA was conducted with varying sizes of the data trajectory matrix, using the approximation part as a weighting factor and the detailed part to integrate for the temporary displacement, to obtain a final weighted temporary displacement. The proposed algorithm was verified using the shaking table test data for four large-scale reinforced concrete frames. Through the proposed method, both the displacement waveform and the induced residual displacement after earthquake excitations can be estimated. The application of the proposed algorithm to building seismic response data is also discussed.
机译：如果可以测量或计算结构位移，则故事和屋顶漂移比在建筑物的结构损坏的评估中起着关键作用。通常，对于建立地震监测，加速度计用于编制分析的响应而不是使用位移仪表，因为它们更具成本效益。因此，使用加速度测量的建筑物的位移响应的精确估计将有助于在地震发生后对其结构的损坏进行快速评估。在该研究中，提出了一种统计频谱分析（SSA）和集成方案的算法的组合来直接从加速度测量估计结构位移。使用近似部分作为加权因子和集成临时位移的详细部分来进行数据轨迹矩阵的变化尺寸，以获得最终加权临时位移。使用振动台测试数据进行四个大型钢筋混凝土框架进行验证该算法。通过所提出的方法，可以估计抗震激发后的位移波形和诱导的残余位移。还讨论了所提出的算法来构建地震响应数据的应用。

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