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Preservation of Missouri Transportation Infrastructures: Strain Determination by Fiber Optics (Task V3. Load Tests and Monitoring Sub-Task 3.6)

Structural assessment of bridge P-0962 in MODOT District 8 involved both the sensing network of fiber-optic and electrical resistance strain gauges (ESGs). Sensing arrays were installed on the mid-span of the bridge to determine the performance of the fiber-optic strain sensors for field applications and to provide in situ measurement capability for the strengthened bridge. Extrinsic Fabry-Perot Interferometric (EFPI) strain sensors were used to measure point strain. Dynamic and static load tests were performed as well as finite element analysis. Scenarios are given for the load testing along with data filtering and processing details. The opinions, findings and conclusions expressed in this report are those of the principal investigators. They are not necessarily those of the Missouri Department of Transportation, U.S. Department of Transportation, or the Federal Highway Administration. This report does not constitute a standard, specification or regulation.