详情

Life Extension of Fatigue-Damaged Highway, Rail, and Transit Bridges: Identifying Actual Crack Tip

项目名称：	Life Extension of Fatigue-Damaged Highway, Rail, and Transit Bridges: Identifying Actual Crack Tip
摘要：	This project has two objectives: (1) to investigate the potential for a fatigue crack to initiate from the stress concentration from a crack-arrest hole combined with the stress concentration from the fillet weld toe, and provide recommendations to prevent such crack initiation; and (2) to assess the reliability of non-destructive evaluation (NDE) methods to identify the location of the crack tip, for a fatigue crack at a fillet weld toe, and provide recommendations on appropriate NDE methods for this application. For the situation shown above, a fatigue crack growing vertically at a fillet weld toe, is common, and crack-arrest holes are a common repair method. Therefore, the project addresses a significant problem of practical value, with the potential to help State DoTs and other bridge owners to reliably repair fatigue cracks. The potential impacts of more reliable fatigue crack repair are reductions in cases where a previously repaired bridge is fully or partially closed as additional expensive emergency repairs are made. This project fits within both the Application of Innovative Materials and Technologies thrust and the Condition Assessment and Health Monitoring thrust of CIAMTIS.
状态：	Active
资金：	Lehigh Federal $ 162,650, Lehigh Match $ 162,650
资助组织：	Office of the Assistant Secretary for Research and Technology
项目负责人：	Donnell, Eric T
执行机构：	Lehigh University
开始时间：	20200803
预计完成日期：	20220802
主题领域：	Bridges and other structures；Maintenance and Preservation