题目：

Air-coupled Sensing for Nondestructive Evaluation of Concrete Structures

报告人：

Dr.Jinying Zhu

Department of Civil Engineering，University of Nebraska Lincoln.

时间：2016年7月4日(周一)上午10:00

地点：深部岩土国家重点实验室305报告厅

欢迎全校教师及同学参加！

力学与建筑工程学院

深部岩土力学与地下工程国家重点实验室

2016年6月29日

报告提要：

Elastic wave-based non-destructive testing (NDT) methods are commonly used for evaluation and flaw detection in aerospace structures and civil engineering infrastructure. However, most of these methods require coupling (direct contact) between sensors and the test surface, which significantly reduces testing speed and consistency, especially for large scale concrete structures in civil engineering.

The air-coupled sensing technology is proposed as a solution for rapid scanning of concrete infrastructure. Dr. Jinying Zhu will review the development of air-coupled sensing technique for civil engineering applications. Four stages of the research will be presented: 1) feasibility study through theoretical analysis; 2) experimental study of air-coupled impact-echo tests to locate delaminations and voids in concrete; 3) recent progress in air-coupled impact-echo testing by using a parabolic reflector to improve the signal-to-noise ratio; 4) a patent pending spark acoustic source for non-contact wave excitation.

报告人简介:

Jinying Zhu is an assistant professor in Department of Civil Engineering at the University of Nebraska Lincoln. She received her Ph.D. degree in civil Engineering from the University of Illinois at Urbana-Champaign in 2006. Her research expertise and interests include NDT for concrete, wave propagation, cement material characterization using ultrasonic waves, and innovative sensing techniques. Dr. Zhu is the pioneering researcher for developing the air-coupled sensing technology for concrete, and the inventor for air-coupled spark source. Dr. Zhu is a recipient of the ASNT Fellowship Award in 2012, and three times winner of ACI-James Instruments Award. Her former graduate students and Postdocs have successful careers in both academia and industry. She is an associate editor of Journal of Nondestructive Evaluation, and served on the editorial board of ASCE Journal of Materials in Civil Engineering.