Etag001 - metal anchors for use in concrete

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European Organisation for Technical Approvals
Europäische Organisation für Technische Zulassungen
Organisation Européenne pour l’Agrément Technique

ETAG 001
Edition 1997

GUIDELINE FOR EUROPEAN TECHNICAL APPROVAL
OF

METAL ANCHORS
FOR USE IN CONCRETE

Annex C: DESIGN METHODS FOR ANCHORAGES
2

nd

Amended October 2001
Amendment November 2006

EOTA©
Avenue des Arts 40Kunstlaan
1040 Brussels
TABLE OF CONTENTS

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ANNEX C
Design methods for anchorages
Introduction
1

Scope
1.1
1.2
1.3
1.4

Type of anchors, anchor groups and number of anchors
Concrete member
Type and direction of load
Safety class

2

Terminology and Symbols
2.1
Indices
2.2
Actions and resistances
2.3
Concrete and steel
2.4
Characteristic values of anchors

3Design and safety concept
3.1
General
3.2
Ultimate limit state
3.2.1 Partial safety factors for actions
3.2.2 Design resistance
3.2.3 Partial safety factors for resistances
3.2.3.1 Concrete cone failure, splitting failure and pull-out failure
3.2.3.2 Steel failure
3.3
Serviceability limit state

4

Static analysis
4.1
Non-cracked and cracked concrete
4.2
Loads acting on anchors4.2.1 Tension loads
4.2.2 Shear loads
4.2.2.1 Distribution of shear loads
4.2.2.2 Shear loads without lever arm
4.2.2.3 Shear loads with lever arm

5

Ultimate limit state
5.1
General
5.2
Design method A
5.2.1 General
5.2.2 Resistance to tension loads
5.2.2.1 Required proofs
5.2.2.2 Steel failure
5.2.2.3 Pull-out failure
5.2.2.4 Concrete cone failure
5.2.2.5 Splitting failure dueto anchor installation
5.2.2.6 Splitting failure due to loading
5.2.3 Resistance to shear loads
5.2.3.1 Required proofs
5.2.3.2 Steel failure
5.2.3.3 Concrete pryout failure
5.2.3.4 Concrete edge failure
5.2.4 Resistance to combined tension and shear loads
5.3
Design method B
5.4
Design method C

6

Serviceability limit state
6.1
Displacements
6.2
Shear load with changing sign7

Additional proofs for ensuring the characteristic resistance of concrete member
7.1
General
7.2
Shear resistance of concrete member
7.3
Resistance to splitting forces

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Introduction
The design methods for anchorages are intended to be used for the design of anchorages under due
consideration of the safety and design concept within the scope of the European TechnicalApprovals (ETA) of
anchors.
The design methods given in Annex C are based on the assumption that the required tests for assessing the
admissible service conditions given in Part 1 and the subsequent Parts have been carried out. Therefore Annex
C is a pre-condition for assessing and judging of anchors. The use of other design methods will require
reconsideration of the necessary tests.
The ETA’s foranchors give the characteristic values only of the different approved anchors. The design of the
anchorages (e.g. arrangement of anchors in a group of anchors, effect of edges or corners of the concrete
member on the characteristic resistance) shall be carried out according to the design methods described in
Chapter 3 to 5 taking account of the corresponding characteristic values of theanchors.
Chapter 7 gives additional proofs for ensuring the characteristic resistance of the concrete member which are
valid for all anchor systems.
The design methods are valid for all anchor types. However, the equations given in the following are valid for
anchors according to current experience only (see Annex B). If values for the characteristic resistance, spacings,
edge distances and partialsafety factors differ between the design methods and the ETA, the value given in the
ETA governs. In the absence of national regulations the partial safety factors given in the following may be used.

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1

Scope

1.1

Type of anchors, anchor groups and number of anchors

The design methods apply to the design of anchorages in concrete using approved anchors which fulfill the...
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