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学术&答辩

学术报告:Damage Detection in Vehicle-Bridge Coupled System

题    目:  Damage Detection in Vehicle-Bridge Coupled System

报 告 人:  Dr. Xuan Kong (美国交通部科罗拉多州)

主 持 人:  邓露教授

报告时间:  2017060914:30-16:00

报告地点:  土木院楼B210

主讲人简介:

Dr. Xuan Kong孔烜,美国交通部(Department of Transportation Colorado State结构工程师,科罗拉多矿业大学(Colorado School of Mines)特聘教师美国Texas, Colorado, Nebraska注册土木工程师(P. E.。同时担任土木工程领域诸多国际期刊的审稿人,ASCE Journal of Aerospace Engineering杂志副主编,以及美国自然科学基金(NSF)的评委,美国土木工程师协会实验分析与器械委员会委员和结构健康监测与控制委员会委员。主要从事结构损伤检测,健康监测,车桥耦合振动,桥梁冲刷,及智能传感和光纤传感器应用等研究。已出版一本专著,一项美国专利,在结构工程,工程力学,智能材料与结构等领域国际顶级期刊上累计发表20余篇学术论文。

讲座摘要:

Most vibration-based damage identification methods make use of measurements directly from bridge structures with attached sensors. However, the vehicle moving on the bridge can serve as both an active actuator and a response receiver. The present study is aimed to develop new methodologies to eventually detect bridge damages such as scour using the dynamic response of the vehicle. To reach the final objective, a new methodology using the transmissibility of vehicle and bridge responses was developed to detect bridge damages. The transmissibility of a simplified vehicle-bridge coupled (VBC) system was analyzed theoretically and numerically to study the feasibility of this method. Then, a tractor-trailer test system was designed to obtain reliable responses and extract bridge modal properties from the dynamic response of moving vehicles. The test vehicle consists of a tractor and two following trailers. The residual responses of the two trailers were used, which successfully eliminated the roughness and vehicle driving effect and extracted the bridge modal properties. Meanwhile, the developed methodologies were applied to detect scour damage from the response of bridge and/or vehicles.
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