原文传递
Application of Ultrasonic Impact Treatment to In-Service Signal Mast Arms. Technical rept. (Sept. 1, 2003-Aug. 31, 2005).
| 题名： | Application of Ultrasonic Impact Treatment to In-Service Signal Mast Arms. Technical rept. (Sept. 1, 2003-Aug. 31, 2005). |
| 作者： | FRANK, K. H.; PALMATIER, A. H. |
| 关键词： | *Fatigue-strength; *Traffic-signal-supports.;Stiffeners-; Highway-signs; Fatigue-life; Procedures-; Repair-times; Performance-evaluation; Welded-joints; Cost-effectiveness; Service-life. |
| 摘要： | The application of Ultrasonic Impact Treatment (UIT) to signal mast arms in the field is described. UIT has been demonstrated in the laboratory to provide a simple means to improve the fatigue performance of the fillet weld of connection of the mast arm tube to the end plate. The procedures used in the field are detailed and the time required for a repair documented. A fatigue test of a mast arm treated in the field is presented. The fatigue test indicated that the UIT treatment improved the performance of the connection to the level of a connection with a thicker end plate. UIT provides a cost effective means of increasing the service life of the mast arms at intersections where galloping oscillations of the mast arms have been observed. |
| 报告类型： | 科技报告 |
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