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Structural Health Monitoring of Representative Cracks in the Manhattan Bridge

项目名称：	Structural Health Monitoring of Representative Cracks in the Manhattan Bridge
摘要：	The Manhattan Bridge is 6855 feet long, crosses the East River and connects the island of Manhattan to Brooklyn. It is subjected to repeated dynamic loads, especially by the transit system trains with the average daily traffic of 1000 trains per day. As a result of repeated loads, especially those by the trains that run on full capacity, multitudes of cracks have been developed in the floor beams at the piers, as well as at bottom cords of trusses and stringers. The owners of the Bridge have raised a number of concerns about the size and number of cracks. In addition, the dynamic amplification associated with the bolted rail joints has raised a serious concern among the New York City Department of Transportation (NYCDOT) engineers. The main objectives of the proposed structural health monitoring (SHM) system is to (1) quantify the level of dynamic amplification due to the bolted rail splices, (2) detect and monitor the growth of the cracks in the main supporting elements of the critical span(s) within the Manhattan approach, and (3) quantify the effectiveness of fatigue mitigation strategies implemented by NYCDOT. The monitoring system will be designed to establish a correlation between the load imposed strains, i.e. a number of trains simultaneously crossing over the bridge, and their impact on crack growth and displacements.
状态：	Active
资金：	292024
资助组织：	Office of the Assistant Secretary for Research and Technology
管理组织：	New York City Department of Transportation
项目负责人：	McAnulty, Kevin
执行机构：	University of Illinois at Chicago (UIC)
主要研究人员：	Ansari, Farhad
开始时间：	20180917
预计完成日期：	20190630
实际结束时间：	0