Design of fastenings for use in concrete - Plastic design of fastenings with headed and post-installed fasteners

This Technical Report gives provisions for design of ultimate limit states in addition to EN 1992 4 for headed and post-installed fasteners excluding concrete screws, which only transmit static actions to the concrete, when the loads on individual fasteners are determined according to plastic analysis of the joint where only equilibrium conditions but no compatibility conditions are considered. Fatigue, impact and seismic loads are not covered.

Bemessung der Verankerung von Befestigungen in Beton - Traglastverfahren für Befestigungsmittel von Kopfbolzen und Dübel

Conception-calcul des fixations pour utilisation dans le béton - Conception plastique des fixations à boulons à tête et à chevilles de fixation

Projektiranje pritrjevanja za uporabo v betonu - Projektiranje pritrjevanja z veznimi sredstvi z glavo in naknadno vgrajenimi veznimi sredstvi po teoriji plastičnosti

To tehnično poročilo zajema določbe za projektiranje skrajnih mejnih stanj dodatno k standardu EN 1992 4 za vezna sredstva z glavo in naknadno vgrajena vezna sredstva razen betonskih vijakov, ki zgolj prenašajo statična dejanja v beton, kadar so obremenitve posameznih veznih elementov določene v skladu s plastično analizo spoja, kjer so upoštevani samo uravnoteženi pogoji, ne pa tudi pogoji združljivosti. Utrujanje, sunki in seizmične obremenitve niso obravnavani.

General Information

Status
Published
Publication Date
25-Sep-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
26-Sep-2018
Completion Date
26-Sep-2018

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SLOVENSKI STANDARD
SIST-TP CEN/TR 17081:2018
01-december-2018

3URMHNWLUDQMHSULWUMHYDQMD]DXSRUDERYEHWRQX3URMHNWLUDQMHSULWUMHYDQMD]YH]QLPL

VUHGVWYL]JODYRLQQDNQDGQRYJUDMHQLPLYH]QLPLVUHGVWYLSRWHRULMLSODVWLþQRVWL

Design of fastenings for use in concrete - Plastic design of fastenings with headed and

post-installed fasteners
Bemessung der Verankerung von Befestigungen in Beton - Traglastverfahren für
Befestigungsmittel von Kopfbolzen und Dübel

Conception-calcul des fixations pour utilisation dans le béton - Conception plastique des

fixations à boulons à tête et à chevilles de fixation
Ta slovenski standard je istoveten z: CEN/TR 17081:2018
ICS:
21.060.01 Vezni elementi na splošno Fasteners in general
91.080.40 Betonske konstrukcije Concrete structures
SIST-TP CEN/TR 17081:2018 en,fr

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 17081:2018
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SIST-TP CEN/TR 17081:2018
CEN/TR 17081
TECHNICAL REPORT
RAPPORT TECHNIQUE
September 2018
TECHNISCHER BERICHT
ICS 21.060.01; 91.080.40
English Version
Design of fastenings for use in concrete - Plastic design of
fastenings with headed and post-installed fasteners
Bemessung der Verankerung von Befestigungen in
Beton - Traglastverfahren für Befestigungsmittel von
Kopfbolzen und Dübel

This Technical Report was approved by CEN on 9 April 2017. It has been drawn up by the Technical Committee CEN/TC 250.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17081:2018 E

worldwide for CEN national Members.
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SIST-TP CEN/TR 17081:2018
CEN/TR 17081:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms, definitions and symbols ................................................................................................................. 5

4 Field of application ......................................................................................................................................... 5

4.1 General ................................................................................................................................................................ 5

4.2 Conditions for ductile behaviour ............................................................................................................... 5

5 Loads on fastenings ........................................................................................................................................ 8

5.1 General ................................................................................................................................................................ 8

5.2 Compression forces ........................................................................................................................................ 8

5.3 Location of the compressive force ............................................................................................................ 8

5.4 Assumption for the tension side of the fastening ............................................................................. 10

5.5 Limitation on location of fasteners in tension ................................................................................... 11

5.6 Distribution of shear forces...................................................................................................................... 11

6 Design of fastenings..................................................................................................................................... 12

6.1 General ............................................................................................................................................................. 12

6.2 Partial factors ................................................................................................................................................ 12

6.3 Resistance to tension load ........................................................................................................................ 12

6.3.1 Required verifications ................................................................................................................................ 12

6.3.2 Steel failure .................................................................................................................................................... 12

6.3.3 Pull-out failure .............................................................................................................................................. 12

6.3.4 Concrete cone failure .................................................................................................................................. 12

6.3.5 Splitting failure ............................................................................................................................................. 13

6.4 Resistance to shear load ............................................................................................................................ 13

6.4.1 Required verifications ................................................................................................................................ 13

6.4.2 Steel failure .................................................................................................................................................... 13

6.4.3 Concrete pry-out failure ............................................................................................................................ 14

6.4.4 Concrete edge failure .................................................................................................................................. 14

6.4.5 Resistance to combined tension and shear load ............................................................................... 14

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SIST-TP CEN/TR 17081:2018
CEN/TR 17081:2018 (E)
European foreword

This document (CEN/TR 17081:2018) has been prepared by Technical Committee CEN/TC 250

“Structural Eurocodes”, the secretariat of which is held by BSI.

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

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
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SIST-TP CEN/TR 17081:2018
CEN/TR 17081:2018 (E)
Introduction
It is intended that this document is used in conjunction with EN 1992-4.

The numerical values for reliability parameters are recommended values and may be changed in a

National Annex, if required. The recommended values apply when the installation complies with the

requirements of EN 1992-4:2018, 4.6.
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SIST-TP CEN/TR 17081:2018
CEN/TR 17081:2018 (E)
1 Scope

This Technical Report gives provisions for design of ultimate limit states in addition to EN 1992-4 for

headed and post-installed fasteners excluding concrete screws, which only transmit static actions to the

concrete, when the loads on individual fasteners are determined according to plastic analysis of the

joint where only equilibrium conditions but no compatibility conditions are considered. Fatigue, impact

and seismic loads are not covered.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

EN 1992-1-1:2004, Eurocode 2: Design of concrete structures — Part 1-1: General rules and rules for

buildings

EN 1992-4:2018, Eurocode 2 — Design of concrete structures — Part 4: Design of fastenings for use in

concrete

EN 1993-1-8:2005, Eurocode 3: Design of steel structures — Part 1-8: Design of joints

3 Terms, definitions and symbols

For the purposes of this document, the terms and definitions and symbols given in EN 1992-4:2018 and

the following symbols apply.
f design value of concrete compressive strength;
F concentrated design resistance for concrete.
Rdu
4 Field of application
4.1 General

Significant redistribution of forces in individual fasteners of fastenings is implicit in plastic analysis.

Therefore, this analysis is acceptable only when the failure is governed by ductile steel failure of the

fastening under tension, shear or combined tension and shear loads. The behaviour of the base plate

might be elastic or plastic (see EN 1993-1-8). The analysis should be used for ultimate limit state only.

This document applies only to fastenings subjected to axial and/or shear forces with bending moment

in one direction (see Figure 1).
4.2 Conditions for ductile behaviour
To ensure a ductile steel failure, the following conditions shall be met:

1) This standard is impacted by the amendment EN 1992-1-1:2004/A1:2014 and corrigenda EN 1992-1-

1:2004/AC:2008 and EN 1992-1-1:2004/AC:2010.

2) This standard is impacted by the corrigenda EN 1993-1-8:2005+AC:2005 and EN 1993-1-8:2005+AC:2009.

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CEN/TR 17081:2018 (E)

a) Fastening arrangements shown in EN 1992-4:2018, Figure 1.2 a) are covered in this document. The

fixture may be subjected to axial and/or shear forces with a bending moment in one direction

(Figure 1). For other forms of the attachment than shown in Figure 1 the principles can be applied

using engineering judgement.
Key
1 fixture
2 fastener
3 axis of bending

Figure 1 — Fastening arrangements for which the plastic design approach may be used -

Examples

Flexible fixtures may be used if the resultant nonlinear load distribution and associated prying forces

are taken into account (see Figure 2).
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CEN/TR 17081:2018 (E)
Key
a prying force
c compression force

Figure 2 — Fastening with a flexible fixture loaded subject to a bending moment and axial

tension - Example

b) The design resistance of a fastener as governed by concrete failure shall exceed the design

resistance as governed by steel failure. Resistance models given in Clause 6 will satisfy this

requirement.
c) The nominal steel strength of the fasteners shall not exceed f = 800
...

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