Fatigue of Prestressed Composite Steel Bridge Girders

预应力组合钢桥梁的疲劳

• 批准号: 8513648
• 负责人: Bilal Ayyub
• 金额: $ 15.2万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-04-01 至 1988-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8513648&HistoricalAwards=false
• 关键词: Fatigue; Prestressed; Composite; Steel; Bridge

Many highway bridges in the United States are in a deteriorating condition as a result of aging, environmental effects, and inadequate strength for today's heavy loads. To extend the remaining life of some of the bridges it is possible to strengthen them by various methods. This project will investigate the feasibility of strengthening steel bridge girders by prestressing the girder to increase its load supporting capabilities. This project follows a previous project which is investigating the static strength, ductility, reliability and load-deflection characteristics of the strengthened composite steel girder. The emphasis for this phase of the investigation will focus on the fatigue strength of the strengthened composite steel girders.

美国的许多公路桥梁都在不断恶化， 由于老化、环境影响和不适当的 今天的重负荷的力量。 为了延长一些生命 对于桥梁，可以通过各种方法对其进行加固。 本项目将调查加强钢的可行性 通过对梁施加预应力以增加其负荷的桥梁梁 支持能力。 该项目遵循以前的项目， 正在研究静态强度、延展性、可靠性和 加固复合钢的荷载-挠度特性 大梁 本阶段调查的重点将集中在 加固组合钢梁的疲劳强度。