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Stress Measuring Method for Beam-Column Members with Long Gauge Fiber Optic Sensors  

Park, Hyo-Seon (연세대학교 건축도시공학부)
Baek, Jae-Min (포스코건설 건축설계팀)
Lee, Hong-Min (연세대학교 대학원 건축공학과)
Publication Information
Journal of the Korean Society of Hazard Mitigation / v.6, no.3, 2006 , pp. 9-16 More about this Journal
Abstract
In structural health monitoring, the safety of structural members are assessed by the level of stress measured by various strain sensors based on different sensing mechanisms. Since most existing strain sensors used for health monitoring system can cover a relatively small range of structural members, it is very difficult to measure the maximum value of the member subjected to varying amount and types of loads with those point sensors. The reliability of assessed safety of a member may be improved by increasing the number of sensors. It may not be also realistic to increase the number of sensors to overcome these drawbacks. In this paper, a stress measuring method for beam-column members is developed by estimating the maximum stress based on the average strains obtained from long gauge sensor. The average strain from long gage fiber optic sensor is transformed into the maximum strain by multiplication of the modification factor derived in this research.
Keywords
Health monitoring; safety evaluation; average strain; long gauge fiber optic sensor;
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