Performance guidelines for design of concrete structures using fibre-reinforced polymer (FRP) materials

This document provides general principles for the verification and assessment of the performance of concrete structures with the applications of different fibre-reinforced polymer (FRP) systems varying from internal FRP reinforcements/tendons, external FRP tendons, externally bonded FRP sheets/plates, to near-surface mounted FRP reinforcement. It can be used for the international harmonization of the design of un-reinforced, conventionally reinforced, and pre-stressed concrete structures with the use of the above-mentioned FRP systems.

Lignes directrices de performance pour la conception des structures en béton utilisant des polymères renforcés de fibres (PRF)

General Information

Status
Published
Publication Date
08-Mar-2020
Current Stage
6060 - International Standard published
Start Date
15-Feb-2020
Completion Date
09-Mar-2020
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ISO 14484:2020 - Performance guidelines for design of concrete structures using fibre-reinforced polymer (FRP) materials
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INTERNATIONAL ISO
STANDARD 14484
Second edition
2020-03
Performance guidelines for design
of concrete structures using fibre-
reinforced polymer (FRP) materials
Lignes directrices de performance pour la conception des structures
en béton utilisant des polymères renforcés de fibres (PRF)
Reference number
ISO 14484:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 14484:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 14484:2020(E)
Contents Page

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

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

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

2 Normative references ...................................................................................................................................................................................... 1

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

4 Design basics ............................................................................................................................................................................................................ 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Design methodology........................................................................................................................................................................... 2

5 Properties of materials .................................................................................................................................................................................. 2

5.1 Properties of concrete and steel .............................................................................................................................................. 2

5.2 Properties of FRP materials ......................................................................................................................................................... 3

5.2.1 General...................................................................................................................................................................................... 3

5.2.2 FRP bars, grids, and plates ...................................................................................................................................... 3

5.2.3 FRP sheets ............................................................................................................................................................................. 3

5.2.4 Other FRP systems ......................................................................................................................................................... 3

5.3 Resins .............................................................................................................................................................................................................. 3

6 Structural analysis .............................................................................................................................................................................................. 3

7 Serviceability limit states ............................................................................................................................................................................ 4

7.1 General ........................................................................................................................................................................................................... 4

7.2 Calculation of stress and strain ................................................................................................................................................. 4

7.3 Cracking ........................................................................................................................................................................................................ 4

7.3.1 Allowable crack width ................................................................................................................................................. 4

7.3.2 Tension and flexural cracks .................................................................................................................................... 4

7.3.3 Shear and torsion cracks ........................................................................................................................................... 4

7.4 Deflections .................................................................................................................................................................................................. 4

8 Ultimate limit states .......................................................................................................................................................................................... 5

8.1 General ........................................................................................................................................................................................................... 5

8.2 Axial and flexural capacity ............................................................................................................................................................ 5

8.2.1 Axial strength and deformation capacity.................................................................................................... 5

8.2.2 Flexural strength and deformation capacity ............................................................................................ 5

8.3 Shear capacity .......................................................................................................................................................................................... 5

8.3.1 Shear strength .................................................................................................................................................................... 5

8.3.2 Punching shear strength ........................................................................................................................................... 5

8.3.3 Torsion ...................................................................................................................................................................................... 6

8.4 Creep-rupture and fatigue ............................................................................................................................................................. 6

9 General structural details ........................................................................................................................................................................... 6

9.1 FRP reinforcements/tendons ..................................................................................................................................................... 6

9.1.1 Bent configurations ....................................................................................................................................................... 6

9.1.2 Anchorages ........................................................................................................................................................................... 6

9.1.3 Splices........................................................................................................................................................................................ 6

9.2 Externally bonded FRP sheets/plates ................................................................................................................................. 6

9.2.1 Anchorage of FRP sheets/plates ........................................................................................................................ 6

9.2.2 Splice of FRP sheets/plates .................................................................................................................................... 6

9.2.3 FRP sheets at rounded corners ........................................................................................................................... 6

9.3 Near-surface mounted FRP reinforcement .................................................................................................................... 7

9.3.1 Dimension of grooves .................................................................................................................................................. 7

9.3.2 Anchorage of near-surface mounted FRP reinforcement ............................................................. 7

© ISO 2020 – All rights reserved iii
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ISO 14484:2020(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).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

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 71, Concrete, reinforced concrete and pre-

stressed concrete, Subcommittee SC 6, Non-traditional reinforcing materials for concrete structures.

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.

This second edition cancels and replaces the first edition (ISO 14484:2013), which has been technically

revised. The main changes compared to the previous edition are as follows:

— the scope of the document now extends from concrete structures with the sole use of FRP materials

to those with the combined use of FRP materials and steel reinforcement;

— the compressive strength of FRP materials is now allowed to be accounted for in design; and

— the creep-rupture and fatigue limit states of FRP materials have been specified.

iv © ISO 2020 – All rights reserved
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ISO 14484:2020(E)
Introduction

Continuous fibre-reinforced polymer (FRP) materials are widely applied to concrete structures. FRP

materials have many advantages, such as a high strength/weight ratio and immunity to corrosion. FRP

materials are available in a variety of geometries, including rod, grid, plate, sheet, strand, etc.

This document describes the general performance requirements for concrete structures with the use

of FRP materials. This document is an umbrella document with general provisions and guidelines and

lists the regional consensus guidelines/standards that are deemed to satisfy this document. Regional

guidelines/standards are generally more prescriptive in nature and vary somewhat from region to region.

This document is intended to provide wide latitude in terms of general requirements for performance

verification and assessment of concrete structures with the use of FRP materials. It is meant to be used

in conjunction with sound engineering judgment.
© ISO 2020 – All rights reserved v
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INTERNATIONAL STANDARD ISO 14484:2020(E)
Performance guidelines for design of concrete structures
using fibre-reinforced polymer (FRP) materials
1 Scope

This document provides general principles for the verification and assessment of the performance of

concrete structures with the applications of different fibre-reinforced polymer (FRP) systems varying

from internal FRP reinforcements/tendons, external FRP tendons, externally bonded FRP sheets/

plates, to near-surface mounted FRP reinforcement. It can be used for the international harmonization

of the design of un-reinforced, conventionally reinforced, and pre-stressed concrete structures with

the use of the above-mentioned FRP systems.
2 Normative references

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 2394, General principles on reliability for structures

ISO 10406-1, Fibre-reinforced polymer (FRP) reinforcement of concrete — Test methods — Part 1: FRP

bars and grids
ISO 10406-2,
...

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