Damage detection and characterization using long-gauge and distributed fiber optic sensors
Damage detection and characterization using long-gauge and distributed fiber optic sensors
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DOI：
10.1117/1.oe.52.8.087101
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发表时间：
2013-08-01
影响因子：
1.3
通讯作者：
Yao, Yao
中科院分区：
文献类型：
--
作者：
Glisic, Branko;Hubbell, David;Yao, Yao
在过去的十年中，光纤应变传感器取得了显着的发展并达到了市场成熟度。它们被广泛认可的优点是高精度、长期稳定性和耐用性。除了这些好处之外，光纤 (FO) 技术还可以为大面积土木结构和基础设施提供经济实惠的仪器，从而实现基于长规格传感器的全球大规模监测以及基于分布式传感器的完整性监测。支持这两种方法的 FO 技术基于光纤布拉格光栅和布里渊光时域分析。本文的目的是介绍 FO 技术和结构评估方法，并通过大规模应用来验证它们。尽管当前应用的许多其他方法无法在真实的现场条件下检测损伤，但所提出的方法被证明适用于损伤检测和表征，即损伤定位，并在一定程度上进行量化。本文详细介绍了两个应用程序来说明这一点：第一个应用程序用于后张混凝土桥梁，第二个应用程序用于分段混凝土管道。 (C) 2013 年光电仪器工程师学会 (SPIE)
Fiber optic strain sensors have significantly evolved and have reached their market maturity during the last decade. Their widely recognized advantages are high precision, long-term stability, and durability. In addition to these benefits, fiber optic (FO) techniques allow for affordable instrumentation of large areas of civil structures and infrastructure enabling global large-scale monitoring based on long-gauge sensors, and integrity monitoring based on distributed sensors. The FO techniques that enable these two approaches are based on fiber Bragg-gratings and Brillouin optical time-domain analysis. The aim of this paper is to present both FO techniques and both structural assessment approaches, and to validate them through large-scale applications. Although many other currently applied methods fail to detect the damage in real, on-site conditions, the presented approaches were proven to be suitable for damage detection and characterization, i.e., damage localization and, to certain extent, quantification. This is illustrated by two applications presented in detail in this paper: the first on a post-tensioned concrete bridge and the second on segmented concrete pipeline. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)