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Hysteretic Characteristic Curve Monitoring and Finite Element Analysis in Nondestructive Testing of Fabricated Foundation Pit

  • ELECTROMAGNETIC METHODS
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Abstract

In this paper, Strain gauge monitoring and strain gauge monitoring were compared, the underground structure health monitoring system was adopted. Based on the monitoring instrument, lateral displacement and deformation of the underground prefabricated structure was mainly measured. Through the analysis on the monitoring data, the deformation was small, which is in good agreement with that of the finite element analysis of the underground fabricated structure. The hysteresis characteristic curve of the steel panel–polymer composite structure with different thickness and scale was obtained. The experimental results show that the hysteresis characteristics of the composite structure attenuated with the length-to-thickness, whilst the load-bearing capacity of the steel panel–polymer structure increased. The increase in the thickness of the polymer layer enhanced the flexibility of the composite structure and with larger length-to-height ratios, the composite structure exhibited larger cross-section area for bearing the load. Through the analysis of the underground assembled structure monitoring data, it is concluded that the thicknesses of the steel panel and the polymer layer were more suitable to be designed at about 6 and 20 mm respectively. The economics of materials were considered, and it will also provide a theoretical basis for the development and utilization of underground prefabricated structures.

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DATA AVAILABILITY

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

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Funding

This research is funded by the National Key Research and Development Program of China (grant no. 2018YFC1802300), the Henan Major Science and Technology Special Project (grant no. 181100310400).

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Authors and Affiliations

  1. School of Civil Engineering, Sun Yat-sen University, 510275, Guangzhou, China

    Dengping Hu & Chengchao Guo

  2. School of Architecture and Civil Engineering, Huizhou University, 516000, Huizhou Guangdong, China

    Dengping Hu

  3. Guangdong Engineering Technology Research Center for Underground Space Development, Sun Yat-sen University, 510275, Guangzhou, China

    Dengping Hu & Chengchao Guo

  4. Nottingham Transportation Engineering Centre, Faculty of Engineering, University of Nottingham, University Park, NG7 2RD, Nottingham, United Kingdom

    Xuanxuan Chu

Authors
  1. Dengping Hu
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  2. Chengchao Guo
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  3. Xuanxuan Chu
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Correspondence to Dengping Hu.

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Dengping Hu, Guo, C. & Chu, X. Hysteretic Characteristic Curve Monitoring and Finite Element Analysis in Nondestructive Testing of Fabricated Foundation Pit. Russ J Nondestruct Test 56, 752–764 (2020). https://doi.org/10.1134/S1061830920090041

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  • DOI: https://doi.org/10.1134/S1061830920090041

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