Improved Cross-Frame Analysis and Design: Wide-Flange T-Shape Sections (2023) / Chapter Skim
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Pages 58-60
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58 This chapter summarizes the major findings from the experimental program and the parametric FEA studies performed in Stage 2 of NCHRP Project 12-113. Section 5.1 outlines the key conclusions and Section 5.2 provides recommendations for cross-frame analysis.
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From page 59... ...
Conclusions and Recommendations 59 cross-frames are relatively stiff systems, and the use of a smaller R-factor for WT sections should not significantly affect the overall efficiency or economy of the system when WT sections are used for the cross-frames when stability forces or deformations are considered. • Results from the parametric studies showed that the most appropriate R-factor for WT crossframes for in-service bridges in their composite condition is 0.8.
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From page 60... ...
60 Improved Cross-Frame Analysis and Design: Wide-Flange T-Shape Sections In addition, the current AASHTO provisions refer to "flange-connected WT sections." The research team considered both flange-connected and stem-connected WT sections. The stemconnected WT sections included coped flanges and offset sections that did not require coping.
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