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首页> 外文期刊>Journal of aerospace engineering >Onsite Identification of Moving Vehicle Loads on Multispan Continuous Bridge Using Both Dictionary Expansion and Sparse Regularization
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Onsite Identification of Moving Vehicle Loads on Multispan Continuous Bridge Using Both Dictionary Expansion and Sparse Regularization

机译：现场识别移动车辆负载在多方面的持续桥上的用词典扩张和稀疏正规化

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摘要

Moving force identification (MFI) plays an important role in monitoring moving vehicle loads acting on a bridge, which has attracted great attention in recent years. Although many MFI methods have been proposed, their effectiveness in real bridges has not been carefully investigated. In this study, focusing on how to identify moving forces from structural responses in a real bridge, some important aspects are conducted and discussed in detail. The effectiveness of a MFI method based on dictionary expansion and sparse regularization is evaluated by a five-span continuous bridge in real engineering. First, a finite-element (1-b) model is established to approximately describe the real bridge. Then, the FE model is updated based on the modal information obtained from structural responses, so the transfer matrices between moving forces and structural responses can be calculated. Meanwhile, data preprocessing is conducted and a suitable dictionary is designed to obtain reasonable MFI results. As a result, the MFI equation by adding reweighted l(1)-norm regularization is used for MFI. Finally, two trucks with known gross vehicle weights are adopted to evaluate its effectiveness. The NM results show that this method can reasonably estimate the moving vehicle loads acting on bridge deck, and the identified moving forces are reasonable. (C) 2021 American Society of Civil Engineers.
机译：移动部队识别（MFI）在监测桥上的移动车载载荷方面发挥着重要作用，近年来引起了极大的关注。虽然已经提出了许多MFI方法，但它们在真正的桥梁中的有效性尚未仔细调查。在这项研究中，专注于如何识别真实桥梁中结构响应的移动力，详细地进行了一些重要方面。基于词典扩展和稀疏正则化的MFI方法的有效性由实际工程中的五跨度连续桥来评估。首先，建立有限元（1-B）模型以近似描述真正的桥梁。然后，基于从结构响应获得的模态信息更新FE模型，因此可以计算移动力与结构响应之间的传输矩阵。同时，进行数据预处理，并且设计了合适的字典以获得合理的MFI结果。结果，通过添加重新重量的L（1）-norm正规的MFI方程用于MFI。最后，采用了两辆具有已知总车辆重量的卡车来评估其有效性。 NM结果表明，该方法可以合理地估计作用在桥式甲板上的移动车辆载荷，并且所识别的移动力是合理的。 （c）2021年美国土木工程师协会。

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  • 来源
    《Journal of aerospace engineering》 |2021年第3期|04021018.1-04021018.11|共11页
  • 作者

    Liu Huanlin; Li Cheng; Yu Ling; Wang Yafei; Zhong Jiwei;

  • 作者单位

    Jinan Univ Sch Mech & Construct Engn MOE Key Lab Disaster Forecast & Control Engn 601 West Huangpu Ave Guangzhou 510632 Peoples R China;

    State Key Lab Hlth & Safety Bridge Struct Wuhan 430034 Peoples R China|Jinan Univ MOE Key Lab Disaster Forecast & Control Engn 601 West Huangpu Ave Guangzhou 510632 Peoples R China;

    Jinan Univ Sch Mech & Construct Engn MOE Key Lab Disaster Forecast & Control Engn 601 West Huangpu Ave Guangzhou 510632 Peoples R China;

    State Key Lab Hlth & Safety Bridge Struct Wuhan 430034 Peoples R China|Jinan Univ MOE Key Lab Disaster Forecast & Control Engn 601 West Huangpu Ave Guangzhou 510632 Peoples R China;

    State Key Lab Hlth & Safety Bridge Struct Wuhan 430034 Peoples R China|Jinan Univ MOE Key Lab Disaster Forecast & Control Engn 601 West Huangpu Ave Guangzhou 510632 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Structural health monitoring (SHM); Moving force identification (MFI); Sparse regularization; Dictionary expansion;

    机译：结构健康监测（SHM）;移动力识别（MFI）;稀疏正则化;词典扩张;

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