Seismic monitoring of dynamic bridge deformations using strain measurements

Fung, Stephanie S.Y.
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University of Hawaii at Manoa
In recent years, civil engineers have become very interested in developing systems to monitor the health of the structures that they have designed and built. There are many systems that can monitor the vertical deflections of structures, but there are few that can effectively measure deflections due to dynamic loads. This report investigates the use of a mathematical model proposed by Swiss engineers, Vurpillot et al [1998], and the selection of innovative fiber optic strain gauges along with a high-speed data acquisition system for future verification tests. Various laboratory static and dynamic verification tests using traditional electrical resistance strain gauges were performed on three beam specimens in the Structures Laboratory at the University of Hawaiʻi at Manoa. The results produced by the mathematical model agreed well with the measured results and the theoretical results from the SAP2000 model. Further tests will be performed using the Fabry-Perot fiber optic strain gauges and data acquisition system that has been selected in this report.
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