杨娜, 李天昊, 赵恭民. 基于应变监测数据预测值的藏式古建筑木结构健康状态评估[J]. 工程力学, 2023, 40(2): 112-123, 134. DOI: 10.6052/j.issn.1000-4750.2021.08.0636
引用本文: 杨娜, 李天昊, 赵恭民. 基于应变监测数据预测值的藏式古建筑木结构健康状态评估[J]. 工程力学, 2023, 40(2): 112-123, 134. DOI: 10.6052/j.issn.1000-4750.2021.08.0636
YANG Na, LI Tian-hao, ZHAO Gong-min. HEALTH ASSESSMENT OF TIBETAN ANCIENT WOOD STRUCTURES BASED ON THE PREDICTED VALUE OF STRAIN MONITORING DATA[J]. Engineering Mechanics, 2023, 40(2): 112-123, 134. DOI: 10.6052/j.issn.1000-4750.2021.08.0636
Citation: YANG Na, LI Tian-hao, ZHAO Gong-min. HEALTH ASSESSMENT OF TIBETAN ANCIENT WOOD STRUCTURES BASED ON THE PREDICTED VALUE OF STRAIN MONITORING DATA[J]. Engineering Mechanics, 2023, 40(2): 112-123, 134. DOI: 10.6052/j.issn.1000-4750.2021.08.0636

基于应变监测数据预测值的藏式古建筑木结构健康状态评估

HEALTH ASSESSMENT OF TIBETAN ANCIENT WOOD STRUCTURES BASED ON THE PREDICTED VALUE OF STRAIN MONITORING DATA

  • 摘要: 为增加藏式古建筑木结构的安全冗余度,该文提出了短期应变监测数据预测方法,以此对藏式古建筑木结构健康状态进行预判性评估。以回廊结构为对象,利用Sobel算子与卷积神经网络方法处理传感器带来的多种数据异常。通过多项式回归和功率谱密度的方法确定应变监测数据组分。引入变分模态分解法对数据进行解耦,以Prophet算法预测短期温度监测应变,以Gumbel极值理论预测不同重现期下的人群监测应变。以不同重现期下的应变监测数据预测值的叠加结果确定需重点关注的结构位置和需立即修缮的结构位置,以满足藏式古建木构的预防性保护要求和最小扰动原则。

     

    Abstract: In order to increase the safety redundancy of the Tibetan ancient wood structures (TAWS), this paper proposes a prediction method to predict their health status based on short-term strain monitoring data. The corridor structure is taken as the research object, with the Sobel operator and the convolutional neural network method being used to deal with various data anomalies from sensors. The strain monitoring data components are determined by polynomial regression and power spectral density. The prophet algorithm is used to predict short-term temperature induced strain, and the Gumbel extreme value theory is used to predict human induced strain under different return periods. The superposition results of the strain monitoring data prediction values under different return periods are used to determine the structural positions that desire more attention and repair, so that the preventive protection requirements and minimum disturbance requirements can be fulfilled.

     

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