Prediction of Deformations Due to Heat Curvingby Charles W. Roeder, Univ of Washington, Seattle, WA, USA,
Abstract: This paper summarizes the state of the art in the thermal deformation techniques. Alternate analytical methods are described. The limitations and accuracy of these models are noted, and the practical range of applicability for each model is discussed. Example calculations are performed for a curved built-up bridge girder. The calculations are used to predict the required temperature and heat pattern for a fabricated curved girder and the residual stress and deformation which results. Calculations are performed to show how the resulting stress and deformation affect the behavior of the completed member. The results show that prediction of the plastic deformation caused by thermal stress can be achieved and the use of such calculations can result in improvement in engineering fabrication practice.
Subject Headings: Deformation (mechanics) | Thermal loads | Plate girders | Model accuracy | Residual stress | Curvature | Girder bridges | Fabrication
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