Volume 29, Issue 8 e2969
RESEARCH ARTICLE

Interval early warning method for state of engineering structures based on structural health monitoring data

Jiahui Liu

Jiahui Liu

Department of Mechanical Engineering, Tongji University, Shanghai, China

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Xianrong Qin

Corresponding Author

Xianrong Qin

Department of Mechanical Engineering, Tongji University, Shanghai, China

Correspondence

Xianrong Qin, Department of Mechanical Engineering, Tongji University, Shanghai 201804, China.

Email: [email protected]

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Yuantao Sun

Yuantao Sun

Department of Mechanical Engineering, Tongji University, Shanghai, China

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Qing Zhang

Qing Zhang

Department of Mechanical Engineering, Tongji University, Shanghai, China

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First published: 23 March 2022
Citations: 6

Funding information: Science and Technology Commission of Shanghai Municipality, Grant/Award Number: 19DZ1161203

Summary

In order to carry out early warning for the abnormal state of engineering structures in time and optimize early warning interval (WI), a new construction of WI method based on relevance vector machine (RVM) and particle swarm optimization (PSO) under the framework of lower upper bound estimation (LUBE) is proposed. First, extract time-domain features of structural monitoring data and then two RVM models are trained using time-domain features to construct lower and upper bound of WI. Kernel parameters of RVM are optimized by PSO algorithm to minimize the loss function of LUBE and obtain the best optimal evaluation indices of WI. The LUBE based on PSO-RVM interval warning method is verified through a numerical simulation and a case study on structural monitoring data of quayside container crane (QCC), and the performance of WI is compared with other prediction methods. The results indicate that the proposed construction of WI method can effectively improve the quality of WI, realize early warning damage, and provide better performance for early WI.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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