Transactions of Nanjing University of Aeronautics & Astronautics
Reliability Analysis of Numerical Simulation of Sea-Crossing Bridge Deformation Under Wave Forces
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Abstract:
To study on the numerical simulation calculation reliability of sea-crossing bridge under complex wave forces， the paper applied GPS deformation monitoring and numerical simulation calculation by researching Qingdao Jiaozhou Bay Sea-Crossing Bridge. The db3 wavelet three-layer decomposition was used on the horizontal movement of the sea-crossing bridge and the wind speed of the waves to analyze their correlation. The complex wave forces value of Qingdao Jiaozhou Bay Sea-Crossing Bridge was loaded on FLAC3D software successfully to make numerical simulation calculation of bridge deformation. Since the accuracy of the GPS deformation monitoring reaches millimeter level， it was used to monitor the exact value of the bridge deformation to judge the reliability of numerical simulation. The relative errors of displacement in X， Y and Z directions were between 33% and 41% through comparison. It could be seen that the numerical simulation error was relatively large， which was mainly due to various environmental factors and the deviation of applied wave forces. However， numerical simulation generally reflects the deformation law of the sea-crossing bridge under complex wave forces， providing an effectively technical support for the safe operation assessment of the sea-crossing bridge.
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Project Supported:
This work was supported by the Natural Science Foundation of Shandong Province （No. ZR2020MD024）.
Clc Number:
P258
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