Methods to Quantify the Utility of NDT in Bridge Reassessment

Küttenbaum, Stefan; Feistkorn, Sascha; Braml, Thomas; Taffe, Alexander; Maack, Stefan

doi:10.1007/978-3-030-64594-6_40

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…If the testing system provides a signal, the signal-response POD is applicable, in which the evaluation relates the defect size (a) to the indication / signal-response (â). Th evaluation of POD requires a certain number of data, which can be based on practical demonstrations on specimens enriched by numerical simulations [115], [116], [117] .…”

Section: Reliability Of Test Methodsmentioning

confidence: 99%

fib Bulletin 109. Existing concrete structures life management, testing and structural health monitoring

Keßler,

Limongelli,

Apostolidi

et al. 2023

Fib Bulletins

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Subject to priorities defined by the Technical Council and the Presidium, the results of the fib's work in commissions and task groups are published in a continuously numbered series of technical publications called bulletins. The following categories are used: Category: Approval by: Technical report Task group and chairpersons of the commission State-of-the-art report Commission Manual / Guide to good practice / Recommendation Technical Council Model code General Assembly Any publication not having met the above requirements will be clearly identified as a preliminary draft. Cover images: Combe Maran viaduct in St. Ursanne (CH), credit photo Hoffmann, M. (2021) created on the basis of publicly available UAV/UAS data of the Combe Maran viaduct in St. Ursanne (CH) created with Agisoft Metashape and 3DFlow Zephyr.© Fédération internationale du béton (fib) 2023.Although the International Federation for Structural Concrete / Fédération internationale du béton (fib) does its best to ensure that all the information presented in this publication is accurate, no liability or responsibility of any kind, including liability for negligence, is accepted in this respect by the organisation, its members, employees or agents.All rights reserved. No part of this publication may be reproduced, modified, translated, stored in a retrieval system or transmitted in any form or by any means -electronically, mechanically, through photocopying, recording or otherwise -without prior written permission from the fib.

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Section: Reliability Of Test Methodsmentioning

confidence: 99%

fib Bulletin 109. Existing concrete structures life management, testing and structural health monitoring

Keßler,

Limongelli,

Apostolidi

et al. 2023

Fib Bulletins

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“…With regard to the ultrasonic and ground penetrating radar (GPR) inspections emphasized in this paper, it should be noted that the quantification of accuracy in locating construction elements inside the concrete such as reinforcement or tendons implies that the objects of interest could be reliably detected objectively. The development of probability of detection (POD)‐curves can yield valuable conclusions in this context 16–18 . POD is delimited in the present article.…”

Section: Concept and Significance Of Measurement Uncertainty In Stochastic Modelingmentioning

confidence: 98%

Reliability assessment of existing structures using results of nondestructive testing

Küttenbaum

Braml

Taffe

et al. 2021

Structural Concrete

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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.

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“…In this paper, the focus is on a brief description of the interface between structural inspections as a reliable source of information and the structural analysis as a source of demand. Details about the measurement uncertainty calculation and the structural reassessment itself can be found in [27].…”

Section: On-site Assessmentmentioning

confidence: 99%

“…Figure 6: Results of the sensitivity analyses performed prior to any testing (on the left) to identify the crucial structure parameters and results of the NDT-supported reliability assessment (on the right) using the on-site measured shear stirrups spacing. [27], compiled.…”

Section: On-site Assessmentmentioning

confidence: 99%

Ways to unlock the potential of non-destructive concrete testing for the reliability assessment of our built environment

Küttenbaum

Maack

Aßmann

et al. 2023

8th International Workshop on Reliability of NDT/NDE

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Sustainability efforts and global climate targets coincide with degradation of the built environment. Changes in use, increasing loads, and—especially in transport infrastructure— sharply rising traffic flows are encountering an infrastructure that has largely reached or exceeded its service life. During the entire lifecycle of structures and materials, the engineer needs to decide which action(s) are optimal, e.g., most eco-efficient at what time. This decision-making process is based on the reassessment of the structure or network, which depends substantially on the information available about the system. It is well known that available and continuously further developed NDT methods allow the collection of manifold information highly relevant in structural assessment. However, the condition (i.e., the quality) of the information measured on-site and the reliability of inspection systems need to be known before NDT results can be used in such safety-relevant calculations. This contribution attempts to shed light on the application of POD analyses and measurement uncertainty calculations in nondestructive testing of concrete structures to provide useful and quality-assured information for reliability assessments of our built environment—with an emphasis on ground penetrating radar. It is shown that signal processing techniques affect POD analysis results to varying degrees, that measurement uncertainties are useful to validate PODs, and that the utilization of both POD analysis and measurement uncertainty calculations can pave the way to NDT-based reliability assessment, which will be exemplarily demonstrated in conclusion—generally aiming to derive those maintenance strategies and actions that are in line with actual demands.

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Methods to Quantify the Utility of NDT in Bridge Reassessment

Cited by 7 publications

References 5 publications

fib Bulletin 109. Existing concrete structures life management, testing and structural health monitoring

fib Bulletin 109. Existing concrete structures life management, testing and structural health monitoring

Reliability assessment of existing structures using results of nondestructive testing

Ways to unlock the potential of non-destructive concrete testing for the reliability assessment of our built environment

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