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Response of long-gauge strain sensors in proximity of force application point
Author(s): Rachel Marek; Branko Glisic
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Paper Abstract

Strain field distributions within a beam are frequently calculated using linear theory. However, linear beam theory does not provide solutions in the areas close to force application points, due to local strain perturbations caused by the force. Hence, interpretation of strain measurements taken by long-gauge sensors in proximity of force application point is difficult, as the measurements cannot be directly compared with analytical models. In addition, due to perturbation, sensors with different gauge lengths installed at that same location provide different values of measured strain. This paper explores and develops a potential analytical model for strain field perturbation in a beam’s regions close to force application points, and investigates the influence of sensor gauge length on strain measurement in these areas. An analytical model derived by Seewald is modified in order to fit the sensor measurements. Based on the model, evaluation of strain measurement is performed taking into account the gauge length of the sensor. Results are validated using data from a real structure, Streicker Bridge at Princeton University campus.

Paper Details

Date Published: 27 March 2018
PDF: 6 pages
Proc. SPIE 10598, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018, 105981H (27 March 2018); doi: 10.1117/12.2300889
Show Author Affiliations
Rachel Marek, WSP Briarcliff Manor (United States)
Princeton Univ. (United States)
Branko Glisic, Princeton Univ. (United States)


Published in SPIE Proceedings Vol. 10598:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2018
Hoon Sohn, Editor(s)

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