Abstract
AbstractSlight bracing of steel bridges to control end warping of the compression flanges near the end supports can be very effective in enhancing the load-carrying capacity of the main girders that are involved. Relatively little information is available, however, regarding the stiffness and strength requirements of end-warping bracings. The results of seven large-scale laboratory tests of different configurations of bracings, including plan bracing and corrugated metal sheets, used in a twin I-girder bridge to resist end warping at support points are presented here. Bracing forces generated in the plan bracings of the test bridge were also compared with those obtained through an approximate analysis for the preliminary analysis of such bracings. Moreover, the bracing forces present in the cross beam of the test bridge were obtained for the different end-warping brace configurations that were investigated. The bracings, the plan bracing type and corrugated metal sheets, were found to effectively enhance ...
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