Strategic Issues Facing Transportation, Volume 3: Expediting Future Technologies for Enhancing Transportation System Performance (2013) / Chapter Skim
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Pages 18-28
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18 Researchers at the Georgia Institute of Technology are developing a novel technology that would facilitate close monitoring of [bridge] structures for strain, stress, and early formation of cracks.
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19 is by human vision. However, the subjectivity of inspections and the absence of coordination among inspection, maintenance, and bridge design are seen as significant technical barriers to effective bridge management (Oh et al., 2009; Aktan et al., 1996; ASCE-SEI, 2008; Graybeal et al., 2002)
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20 or replacement with potential negative influence on the goal of preservation. Preservation metrics are defined in Table 4-2.
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21 The list in Table 4-4 is not exhaustive. These technologies can assist or augment the functional capabilities of bridge inspection to • Enable inspectors to measure properties more accurately than could be done otherwise (e.g., using visual techniques)
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22 used to extend bridge life and confirm designs and has moved beyond the demonstration stage (Inaudi et al., 2009a.) For this illustration of STREAM, the research team identified six technology bundles to be examined in the next steps of the assessment.
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23 2, and 3. However, each method uses only one type of probing excitation (microwave for GPR and optical for FOS)
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24 technologies.39 Table 4-7 shows the breakdown of net fixed and recurring costs for each technology during the initial 5-year period of its use. Weighing Indirect Effects Adoption of different technologies may have indirect effects in addition to the anticipated direct costs and benefits.
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25 • Highly sensitive sensor systems could lead to discovery of previously imperceptible anomalies that either may never manifest as problems or for which amelioration may be beyond current financial or technical means. For these reasons, the research team advocates the use of STREAM as a framework and as a platform for discussion and analysis to occur but not as a substitute for agency-level decision making.
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26 benefit of audible methods that may better determine the condition state. All of the technology alternatives improve the ability to determine condition state compared to the current visual or visual plus audible approaches.
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27 though not surprising (given that the outputs were generated from inputs by the same group,) the results provided insights that were considered valuable.
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28 accurately.45 It is one thing to strive for simplicity; it is another to go beyond a firm grounding in decision theory and statistics or imply such a foundation when it is not present. In designing STREAM the research team strove to create simplicity without violating sound analytical practice.
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