Making optimal decisions about the reliability of existing structures requires that the information used in assessment adequately represents the properties and the condition of the structures. The knowledge gap regarding a structure to be assessed can be successively filled by individually purposeful observations on site. This paper gives an overview of an approach for utilizing nondestructively gathered measurement results in reliability assessment of existing structures. An essential part of measurement-based stochastic modeling of basic variables is the calculation of measurement uncertainties, which serves to establish confidence in measurement, to ensure the comparability of unambiguously expressed measurement results, and to quantify the quality of the measured information. Regarding the current discourse on how to treat information collected on-site in the context of assessment, the authors recommend that measurement uncertainty becomes an uncertainty component mandatorily to be represented in measurement-based stochastic models. The main steps of the proposed concept are presented, and the advantages of its application are emphasized by means of a prestressed concrete bridge as case study. The bridge is assessed regarding the serviceability limit state decompression using ultrasonic and radar data measured at the structure.

中文翻译：

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使用无损检测结果对现有结构进行可靠性评估

对现有结构的可靠性做出最佳决策需要评估中使用的信息充分代表结构的特性和状况。关于待评估结构的知识差距可以通过现场个别有目的的观察来连续填补。本文概述了在现有结构的可靠性评估中利用非破坏性收集的测量结果的方法。基于测量的基本变量随机建模的一个重要部分是测量不确定度的计算，它用于建立测量的置信度，确保明确表达的测量结果的可比性，并量化测量信息的质量。关于当前关于如何在评估背景下处理现场收集的信息的讨论，作者建议测量不确定性成为一个不确定性成分，必须在基于测量的随机模型中表示。介绍了所提出概念的主要步骤，并通过作为案例研究的预应力混凝土桥梁强调了其应用的优势。使用在结构处测量的超声波和雷达数据评估桥梁的适用性极限状态减压。并以预应力混凝土桥梁为例，强调了其应用的优势。使用在结构处测量的超声波和雷达数据评估桥梁的适用性极限状态减压。并以预应力混凝土桥梁为例，强调了其应用的优势。使用在结构处测量的超声波和雷达数据评估桥梁的适用性极限状态减压。