Non-destructive testing — Acoustic emission testing — Test method for damage qualification of reinforced concrete beams

This document specifies a test for damage qualification of reinforced concrete beams in services as bridges, docks and buildings.

Essais non destructifs — Contrôle par émission acoustique — Méthode d'essai pour la qualification des dommages des faisceaux de béton armé

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Status
Published
Publication Date
23-Jan-2019
Current Stage
6060 - International Standard published
Start Date
24-Jan-2019
Completion Date
24-Jan-2019
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ISO 16837:2019 - Non-destructive testing -- Acoustic emission testing -- Test method for damage qualification of reinforced concrete beams
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INTERNATIONAL ISO
STANDARD 16837
First edition
2019-01
Non-destructive testing — Acoustic
emission testing — Test method for
damage qualification of reinforced
concrete beams
Essais non destructifs — Contrôle par émission acoustique —
Méthode d'essai pour la qualification des dommages des faisceaux de
béton armé
Reference number
ISO 16837:2019(E)
ISO 2019
---------------------- Page: 1 ----------------------
ISO 16837:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

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ii © ISO 2019 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 16837:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative reference ......................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Requirement for the measuring system....................................................................................................................................... 1

5 Environmental noises...................................................................................................................................................................................... 2

6 Test procedure ........................................................................................................................................................................................................ 2

6.1 Basics ............................................................................................................................................................................................................... 2

6.2 Failure modes of reinforced concrete beams and AE activity ........................................................................ 2

6.3 Load ratio and calm ratio ............................................................................................................................................................... 3

7 Test report ................................................................................................................................................................................................................... 4

Bibliography ................................................................................................................................................................................................................................ 5

© ISO 2019 – All rights reserved iii
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ISO 16837:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

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expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 135, Non-destructive testing,

Subcommittee SC 9, Acoustic emission testing.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 16837:2019(E)
Introduction

Acoustic emission (AE) techniques are extensively developed in concrete engineering. Concrete

structures have long been referred to as maintenance-free. Recently, however, it is realized that the

concrete structures can deteriorate due to many factors. In particular, heavy traffic loads result in

fatigue of the concrete structures.

In order to assess the fatigue of reinforced concrete beams, one criterion to qualify the damage levels is

proposed on the basis of two ratios associated with the Kaiser effect.

New AE parameters of load ratio and calm ratio are defined for qualification of the damage. It is found

that the damage qualified by the two ratios are in good agreement with actual damage of the beams.

This suggests that the damage of the reinforced concrete structures in service as bridges, docks and

buildings be quantitatively assessed, by simply applying cyclic loading and monitoring AE activity.

© ISO 2019 – All rights reserved v
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INTERNATIONAL STANDARD ISO 16837:2019(E)
Non-destructive testing — Acoustic emission testing
— Test method for damage qualification of reinforced
concrete beams
1 Scope

This document specifies a test for damage qualification of reinforced concrete beams in services as

bridges, docks and buildings.
2 Normative reference

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 12716, Non-destructive testing — Acoustic emission inspection — Vocabulary
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 12716 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
AE activity
occurrence of AE hits or counts under stressed conditions in concrete
3.2
Kaiser effect

little AE activity (3.1) observed until the maximum load of the previous stage is surpassed when

stresses are applied, removed and then reapplied to a material or a structure
3.3
Felicity ratio

ratio of the load at which emissions start to the previous maximum load when stresses are applied,

removed and then reapplied to a material or a structure

Note 1 to entry: This shows the ratio of the degree of conformity of the Kaiser effect (3.2).

4 Requirement for the measuring system

For detection of AE signals, AE sensors shall be sensitive enough to detect AE signals g

...

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