Problem – Sudden failures of civil infrastructure systems Approaches to the problem –

1. 題 Synthetic Aperture Radar Imaging for the Distant Inspection of Multi-layer GFRP-concrete Structures 題目： 講者： Tzu-Yang YuAssistant Professor, Ph.D. 時地： October 26th, 2011 土木館五樓 • In addition to the I-35W bridge, there are approximately 75,000 other U.S. bridges also rated as “structurally deficient” in 2007. • Structurally deficient: “The structure is deemed to have met minimum tolerable limits to be left in place as it is.”  Are these 75,000 structurally deficient bridges safe? How do we know?  We need reliable (inspection results are creditable), efficient (inspection can be accomplished in time) condition assessment technologies for this challenging problem. • Significant impacts – EX: I-35 Highway Bridge Collapse, Minneapolis, MN (6:05pm, Wed., Aug. 1, 2007)： Introduction： Problem – Sudden failures of civil infrastructure systems Approaches to the problem – 壹、Review of NDT in Civil Eng Condition assessment of structures： Current distant NDT methods provide only the surface profile of structures, while some near-field NDT methods can conduct in-depth inspection of structures. Method and Features： Strengthening and repair of structures： 貳、Condition assessment of structures and Strengthening and repair of structures： 感謝 Tzu-Yang YuAssistant Professor, Ph.D. 蒞臨師生謹致誠摯謝意