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Response-based time-invariant methods for damage localization on a concrete bridge

机译：基于响应的时间不变方法，用于混凝土桥梁上的损坏定位

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This paper is integral part of the Special Issue on "Existing Concrete Structures: Structural Health Monitoring and Testing for condition assessment." It deals with vibration-based methods (VBMs) for damage localization that approach the problem of structural integrity management through the analysis of the dynamic response of the structure under ambient or forced vibrations. In the last years, these methods received a widespread interest in the structural health monitoring (SHM) community due to the possibility to use them for continuous SHM and real time damage identification. The performance of these methods is commonly verified on numerical models or laboratory specimens that, by their nature, cannot reproduce all the sources of uncertainties found in practice. The availability of data recorded on a real benchmark, the S101 bridge in Austria, enabled the comparison of three well known vibration-based time-invariant methods for damage localization, namely, the curvature method, the interpolation error method, and the strain energy method. The bridge, built in the early 1960, is a typical example of a European highway bridge. Responses to ambient vibrations were recorded both in the undamaged and in several different damage scenarios artificially inflicted to the bridge. This paper reports the results of the application of the three mentioned methods of damage localization to this case study.
机译：本文是“现有混凝土结构：结构健康监测和对条件评估测试”的特点的组成部分。它涉及基于振动的方法（VBMS），用于通过分析环境或强制振动下结构的动态响应来接近结构完整性管理问题的损坏定位。在过去几年中，这些方法由于可能为连续的SHM和实时伤害识别使用它们而受到结构健康监测（SHM）社区的广泛兴趣。这些方法的性能通常在数值模型或实验室标本上验证，通过他们的性质，不能再现在实践中发现的所有不确定性来源。在奥地利的S101桥梁中记录的数据上记录的数据，使其比较了三种众所周知的基于振动的时间不变方法，用于损坏定位，即曲率方法，插值误差法和应变能量方法。这座桥梁建于1960年初，是欧洲公路桥的典型例子。对环境振动的反应在未造成的和几个不同的损伤情景中记录到桥梁。本文报告了三个提到的损害定位方法的应用结果。

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