The Remaining Life in Deteriorated Steel Deck-Girder Highway Bridges

劣化钢桥面梁公路桥的剩余寿命

• 批准号: 8407248
• 负责人: John Johnson
• 金额: $ 9万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1984
• 资助国家: 美国
• 起止时间: 1984-12-01 至 1987-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8407248&HistoricalAwards=false
• 关键词: Remaining; Life; Deteriorated; Steel; Deck

This research will follow a novel approach for assessing remaining life in an existing simple-span, steel girder highway bridge. The objectives are to develop a method for obtaining a quantitative assessment of the deterioration in a steel bridge caused by corrosion, and to develop testing procedures for estimating the remaining life in the most highly stressed material in an existing steel bridge without jeopardizing that life. The investigation will be based on tests of bridge beams that have been taken out of service after performing for more than 50 years. Both axial fatigue testing of small specimens and testing of entire beams will be conducted. To quantify the effect of corrosion, the fatigue strength reduction factor will be calculated using a form of Neuber's rule. The testing procedure for estimating remaining life will be based on using salvaged beams to establish how the fraction of life remaining varies between specific locations. Full-sized salvaged beams will be tested.

这项研究将遵循一种评估剩余寿命的新方法 在现有的简单跨度，钢梁公路桥。 的 目标是开发一种方法，用于获得定量的 评估由腐蚀引起的钢桥退化， 并制定测试程序，以估计 现有钢桥中应力最高的材料， 危及生命 调查将基于以下测试： 桥梁梁在完成以下工作后已停止使用， 超过50年。 小试样的轴向疲劳试验和 整根梁将进行测试。 为了量化 腐蚀，将计算疲劳强度折减系数 使用Neuber规则的一种形式。 估计的测试程序 剩余寿命将基于使用打捞梁来确定如何 在不同的地点，剩余的生命的比例也不同。 将对全尺寸打捞梁进行测试。