Journal
STRUCTURAL CONTROL & HEALTH MONITORING
Volume 28, Issue 10, Pages -Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/stc.2809
Keywords
displacement; high arch dams; mixed-coefficient panel model; overall deformation behavior; spatial clustering; zoned inversion analysis
Funding
- National Key R&D Program of China [2018YFC0406703]
- National Natural Science Foundation of China [51709021, 51779277]
- China Postdoctoral Science Foundation [2020M670387]
- Open Research Fund of State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin (China Institute of Water Resources and Hydropower Research) [IWHR-SKL-KF202002]
- Belt and Road Special Foundation of the State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering [2019nkzd03]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_2560]
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This study developed a mixed-coefficient panel model for dam displacements by grouping monitoring points and considering various causal factors. The model successfully represented the overall deformation behavior and structural integrity of a high arch dam, showing good performance in interpreting and predicting dam displacement and analyzing viscoelastic parameters of the dam body concrete.
The mathematical monitoring models that are currently used for the displacement of arch dams are mostly established for a single monitoring point, without considering the spatial association of the displacements at multiple monitoring points. The main purpose of this paper is to develop and verify a mixed-coefficient panel model for dam displacements of multiple monitoring points. To maintain the largest similarities of the deformation mechanism of different monitoring points represented by one panel model, the displacement monitoring points on dam body are first divided into several groups according to the similarity index of the incremental distance between their measured displacement time series. The mixed-coefficient panel models are then established for each clustered zone in which the adjustment coefficient of the FEM-calculated hydraulic component is determined to be identical for all the monitoring points in the same zone, whereas the regression coefficients of the temperature and time effect component are considered to be variable, in order to reflect the similarities and differences of deformation mechanism in different dam regions. Based on the hydraulic, hysteretic, seasonal, and time (HHST) causal factors, the proposed panel model is verified by the measured radial displacement field of the Jinping-I arch dam. The modeling results demonstrate that the proposed mixed-coefficient panel model can effectively represent the overall deformation behavior and structural integrity of a high arch dam, and it has good performance in the interpretation and prediction of the dam displacement and the inversion analysis of viscoelastic parameters of the dam body concrete.
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