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Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I); Physical research rept. (Final) Mar 94-Dec 99
| 题名： | Methods to Reduce Built-in Residual Stresses in Steel Bridge Diaphragms (Phase I); Physical research rept. (Final) Mar 94-Dec 99 |
| 作者： | South, J. M.; Hahin, C. |
| 关键词： | Steel bridges; Residual stresses; Reinforcing steels; Construction; Concrete durability; Strain gages; Aluminum alloys; Diaphragms; Girder bridges; Structural analysis; Elastomers; Maintenance; Bridge decks; Abutments; Bridge piers |
| 摘要： | This investigation determined the magnitude and origin of residual stresses in plate girders, diaphragms and stiffeners built-in during construction. Residual stresses can contribute to crack formation. Three different steel bridges were studied: (1) a multi-girder bridge anchored at the abutments with no center pier; (2) a 4-span continuous multi-girder bridge with piers; (3) a movable, double-leaf bascule bridge. Bridges were instrumented with strain gages at the fabricator. Changes in reference strains were monitored: (1) after steel erection and bolt-up; (2) after deck placement; and (3) after parapet placement. |
| 总页数： | 102p |
| 报告类型： | 科技报告 |
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