Dynamic Performance of Cantilevered Sign Trusses for Fatigue
| 项目名称： | Dynamic Performance of Cantilevered Sign Trusses for Fatigue |
| 摘要： | Cantilevered sign truss structures are susceptible to fatigue issues at the connection between the pole and mast arm due to vibrations caused by galloping, vortex shedding, natural wind gusts, and truck-induced wind gusts. Calculations carried out by engineers at KDOT indicate that box connection details should be susceptible to fatigue; however, no fatigue cracks have been observed. Recently, it has been proposed to remove walkways on cantilevered sign trusses to prevent vandalism. It is not evident what impact walkway removal will have on the aerodynamic/aeroelastic properties of cantilevered sign trusses and how this will influence fatigue performance. To understand the risk of potential failures, there is a need to evaluate these sign structures and develop strategies that result in lower levels of vibrations to mitigate fatigue problems. Research has considered wind loads in sign structures [1,2], but the impact of walkway removal remains unclear. The proposed work is an important step in ensuring safe cantilevered sign trusses. |
| 状态： | Active |
| 资金： | 63,355 |
| 资助组织： | University of Kansas, Lawrence |
| 管理组织： | Kansas Department of Transportation |
| 项目负责人： | Ingalls, Michael |
| 执行机构： | University of Kansas, Lawrence |
| 主要研究人员： | Fadden, Matthew |
| 开始时间： | 20170701 |
| 预计完成日期： | 20190630 |
| 实际结束时间： | 0 |
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