详情

原文传递 Active Sensing for Online Highway Bridge Monitoring.

题名：	Active Sensing for Online Highway Bridge Monitoring.
作者：	sohn, h.
关键词：	sensor-based, development, evaluation, baseline-free, sensors, cracks, damage detection, debonding, tranducer devices, data collection
摘要：	This project was aimed at developing and evaluating a sensor-based nondestructive testing (NDT) method for online monitoring of highway bridges without using any past baseline data. A theoretical framework of the proposed baseline-free NDT technique was developed along with a time reversal process (TRP), and a NDT methodology for detecting cracks in bridge steel girders was formulated. To prove the feasibility of the proposed concept, research addressed the following key questions: What is the practical sensing range of TRP for damage detection. Can different types of be selectively detected and quantified. Do sensor conditions affect damage detection. Do undesirable operational and environmental conditions affect damage detection. Is the proposed TRP applicable to more complex structural geometries. The sensing range of TRP was found to be significantly larger than that achieved by conventional NDT methods, and the active sensing device was able to propagate up to 40 m. / NOTE: Final Rept. (Apr 2006-Mar 2007). / Supplementary Notes: Sponsored by Transportation Research Board, Washington, DC. IDEA Programs. / Availability Note: Product reproduced from digital image. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0725；52p
报告类型：	科技报告