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原文传递 Measuring Support Reactions in a Composite Model Bridge Using Distributed Fiber Optic Sensing
题名: Measuring Support Reactions in a Composite Model Bridge Using Distributed Fiber Optic Sensing
正文语种: eng
作者: Jack Gillham;Richard Sturm;Neil A. Hoult;Evan C. Bentz
作者单位: Queen’s Univ.;Queen’s Univ.;Queen’s Univ.;Univ. of Toronto
摘要: Abstract This paper investigates the potential of using distributed fiber optic sensing (DFOS) to evaluate load distribution and support reactions within a statically indeterminate structure. A multibeam two-span composite model bridge was built and instrumented with DFOS. Three different loading scenarios (full width, concentrated, and offset) and two different slab thicknesses were used to investigate their impact on load distribution and reactions forces. Disturbed regions near the supports meant that shear forces, and thus reactions, could not be measured in this region and thus had to be extrapolated. Two extrapolation techniques (linear and second order) were developed and evaluated using a grillage model. The second-order fitting technique provided more accurate reaction forces for the grillage model and was then used with the distributed strain data from the model bridge to estimate the reactions. Challenges associated with the scale of the experiment were identified that should result in better performance on full-scale structures.
出版年: 2023
期刊名称: Journal of structural engineering
卷: 149
期: 7
页码: 04023076.1-04023076.15
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