1 April 2016 Geometry control of long-span continuous girder concrete bridge during construction through finite element model updating
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Abstract
In bridge construction, geometry control is critical to ensure that the final constructed bridge has the consistent shape as design. A common method is by predicting the deflections of the bridge during each construction phase through the associated finite element models. Therefore, the cambers of the bridge during different construction phases can be determined beforehand. These finite element models are mostly based on the design drawings and nominal material properties. However, the accuracy of these bridge models can be large due to significant uncertainties of the actual properties of the materials used in construction. Therefore, the predicted cambers may not be accurate to ensure agreement of bridge geometry with design, especially for long-span bridges. In this paper, an improved geometry control method is described, which incorporates finite element (FE) model updating during the construction process based on measured bridge deflections. A method based on the Kriging model and Latin hypercube sampling is proposed to perform the FE model updating due to its simplicity and efficiency. The proposed method has been applied to a long-span continuous girder concrete bridge during its construction. Results show that the method is effective in reducing construction error and ensuring the accuracy of the geometry of the final constructed bridge.
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Jie Wu, Jie Wu, Quan-sheng Yan, Quan-sheng Yan, Jian Li, Jian Li, Min-yi Hu, Min-yi Hu, } "Geometry control of long-span continuous girder concrete bridge during construction through finite element model updating", Proc. SPIE 9805, Health Monitoring of Structural and Biological Systems 2016, 98052U (1 April 2016); doi: 10.1117/12.2219477; https://doi.org/10.1117/12.2219477
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