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Review of Steel Bridges with Fracture-Critical Elements.
| 题名： | Review of Steel Bridges with Fracture-Critical Elements. |
| 作者： | Dexter-Robert-J; Connor-Robert-J; Mahmoud-Hussam |
| 关键词： | Bearing-capacity; Continuous-girder-bridges; Contraction-; Creep-; Diaphragms-Engineering; Ductility-; Expansion-; Girders-; Horizontal-web-reinforcement; Negative-moment-connections; Positive-moment- |
| 摘要： | Double-mast arm cantilevered sign structures are widely used in Indiana and in many other states. Because of the large sign area and relatively high flexibility, wind loading on these sign structures occasionally produces significant stress cycles. Cracking caused by fatigue damage may occur at several critical spots on the sign structures. An analytical investigation of the fatigue lives of the critical details in double-mast arm sign structures is discussed in this paper. An analytical procedure is introduced, and wind load selection and simulation are explained. Finite element models based on a prototype double-mast arm sign structure are described, and dynamic analyses and fatigue life results are presented. It was found that the post-to-base plate socket weld connection was the most critical detail and that variations in the fatigue life occurred because of differences in the wind environment at various sites. |
| 总页数： | Transportation Research Record: Journal of the Transportation Research Board. 2005. (1928) pp64-72 (6 Fig., 1 Tab., 18 Ref.) |
| 报告类型： | 科技报告 |
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- Fracture-Critical System Analysis for Steel Bridges. National Cooperative Highway Research Program (NCHRP) 883.
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