Abstract

This paper is focused on the description and application of an extended version of the Interpolation Method for the damage localization where a statistical characterization of the indicator is proposed. The damage indicator is defined in terms of the probability of exceedance of a detection threshold corresponding to the accepted probability of false alarm. The verification of the accuracy of the novel indicator is carried out with reference to a real case study of a typical example of a European highway pre-stressed concrete road bridge, the S101 Flyover Reibersdorf Bridge built in Austria in the early 1960. Responses to ambient vibration have been recorded on the bridge both in the undamaged and in several different damage scenarios artificially inflicted. In the paper data recorded on the S101 have been used to check the accuracy of damage indicator for the several damage scenarios and its sensitivity to the statistic model assumed to describe the variability of the damage feature.

摘要

本文着重于对损伤定位的插值方法的扩展版本的描述和应用，其中提出了指标的统计特征。根据超过检测阈值的概率来定义损坏指示器，该检测阈值对应于可接受的错误警报概率。对该新型指示器的准确性进行的验证是参考欧洲高速公路预应力混凝土公路桥梁的典型实例（1960年初在奥地利建造的S101天桥Reibersdorf桥梁）的实际案例进行的。在未损坏的以及人为造成的几种不同损坏情况下，桥梁上都记录了振动。