Calibration of AASHTO LRFD Concrete Bridge Design Specifications for Serviceability (2014) / Chapter Skim
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List of Figures Figure E-1 Stress distribution diagrams for a typical prestressed concrete bridge girder at various stages of loading.
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E.1 Derivation of the Resistance Prediction Equation of Prestressed Concrete Bridge Girders The derivation of the resistance prediction equation for a prestressed concrete girder subjected to flexural loading is shown in this appendix. Figure E-1 shows the stress distribution diagram for a typical prestressed concrete bridge girder at various stages of loading.
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fh = deck thickness. 1fh = top flange thickness.
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Considering an uncracked section under service loads and plane section remains plane, the linear strain distribution diagram is as follows: Figure E-2 Strain distribution at service loads. From Figure E-2, the relationship between top and botom strain as follows: p c ps d c h c ε ε − ⋅ = − ( E-10)
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( E-13) where ( )
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