Steel Framing Strategies for Highly Skewed Bridges to Reduce/Eliminate Distortion near Skewed Supports, Summary

摘要

In this project, Florida International University researchers simplified design and construction of steel bridges with skewed supports by developing a complete and coherent design methodology. They structured their work in five tasks: introducing terms for detailing methods consistent with field practice; identifying structural responses affected by detailing methods; recommending methods of analysis to evaluate structural responses; developing methods to estimate fit-up forces and practices to reduce them; and developing design provisions for skewed bridges. Careful analysis revealed the critical elements for cross-frame design, summarized in a flow chart that can help designers choose the appropriate detailing method for cross-frame systems in straight skewed I-girder bridges.