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Use of Wind Power Maps to Establish Fatigue Design Criteria for Traffic Signal and High-Mast Structures.
| 题名： | Use of Wind Power Maps to Establish Fatigue Design Criteria for Traffic Signal and High-Mast Structures. |
| 作者： | Price-R.L.; Puckett-J.A.; Barker-M.G. |
| 关键词： | *Wind-power; *Traffic-signals; *Traffic-control; *Design-criteria.;Luminaires-; Fatique-; Cracking-; Wind-demand; Costs-; Specifications-; Load-dynamics; Failures-; Inspection-. |
| 摘要： | Recent design requirements for traffic signal and sign structures incorporated fatigue load criteria related to wind that are producing significant increases in size and cost. The Fourth Edition of the AASHTO Luminaire and Traffic Signal Specification (2002) with interims specification is a significant change to past practices and often results in much larger and more costly structures. here conservative principles (envelope wind demands and infinite life) for design at incrased cost even for those regions not adversely affected by wind-induced fatigue. The states do not have steady, sustained windsand have not experienced significant fatigue failures have concern with the larger and more costly structures. A rational basis for lowering the fatigue design loads may be appropriate. This study compares fatigue failures with respect to wind power (expressed as a function of average wind velocity). Inspection reports for approximately 2500 cantilevered traffic structures and 700 high-mast luminaires were collected and analyzed for suspected fatigue cracking. |
| 报告类型： | 科技报告 |
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