Eurocode 3: Design of steel structures - Part 1-8: Design of joints

1.1   Scope of EN 1993 1 8
(1) This document gives design methods for the design of joints subject to predominantly static loading using all steel grades from S235 up to and including S700 unless otherwise stated in individual clauses.
1.2   Assumptions
(1) The assumptions of EN 1990 and EN 1993-1-1 apply to this document.
(2) The design methods given in this part of EN 1993 are applicable when the quality of construction is as specified in EN 1090 2 or EN 1090 4, and that the construction materials and products used are those specified in the relevant parts of EN 1993, or in the relevant material and product specifications.

Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1-8: Bemessung von Anschlüssen

1.1   Anwendungsbereich von EN 1993 1 8
(1) Dieses Dokument enthält Regeln für den Entwurf, die Berechnung und die Bemessung von Anschlüssen aus Stahl mit allen Stahlsorten von S235 bis einschließlich S700 unter vorwiegend ruhender Belastung, sofern in einzelnen Abschnitten nicht anders angegeben.
1.2   Annahmen
(1) Für dieses Dokument gelten die Annahmen nach EN 1990 und EN 1993 1 1.
(2) Die in diesem Teil von EN 1993 angegebenen Bemessungsverfahren sind anwendbar, wenn die Qualität der Konstruktion den Festlegungen nach EN 1090 2 oder EN 1090 4 entspricht und die verwendeten Baustoffe und Bauprodukte den Festlegungen nach den maßgebenden Teilen von EN 1993 oder den maßgebenden Baustoff- und Bauproduktspezifikationen entsprechen.

Eurocode 3: Calcul des structures en acier - Partie 1-8 : Calcul des assemblages

1.1   Domaine d'application de l'EN 1993-1-8
(1) Le présent document donne des méthodes de calcul d'assemblages soumis à un chargement essentiellement statique en utilisant toutes les nuances d'acier de S235 jusqu'à S700 inclus, sauf indication contraire dans certains paragraphes.
1.2   Hypothèses
(1) Les hypothèses de l'EN 1990 et de l'EN 1993-1-1 s'appliquent au présent document.
(2) Les règles données dans cette partie de l'EN 1993 sont applicables lorsque le niveau de qualité de construction est tel que spécifié dans l'EN 1090 2 ou l'EN 1090 4 et que les matériaux et produits de construction utilisés sont ceux qui sont spécifiés dans les parties correspondantes de l'EN 1993 ou dans les spécifications de matériaux et produits appropriées.

Evrokod 3: Projektiranje jeklenih konstrukcij – 1-8. del: Projektiranje spojev

General Information

Status
Not Published
Current Stage
4060 - Closure of enquiry - Enquiry
Due Date
24-Jun-2021
Completion Date
24-Jun-2021

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SLOVENSKI STANDARD
oSIST prEN 1993-1-8:2021
01-maj-2021
Evrokod 3: Projektiranje jeklenih konstrukcij – 1-8. del: Projektiranje spojev
Eurocode 3: Design of steel structures - Part 1-8: Design of joints
Eurocode 3: Bemessung und Konstruktion von Stahlbauten - Teil 1-8: Bemessung von
Anschlüssen
Eurocode 3: Calcul des structures en acier - Partie 1-8 : Calcul des assemblages
Ta slovenski standard je istoveten z: prEN 1993-1-8
ICS:
91.010.30 Tehnični vidiki Technical aspects
91.080.13 Jeklene konstrukcije Steel structures
oSIST prEN 1993-1-8:2021 en,fr,de

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

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oSIST prEN 1993-1-8:2021
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oSIST prEN 1993-1-8:2021
DRAFT
EUROPEAN STANDARD
prEN 1993-1-8
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS 91.010.30; 91.080.13 Will supersede EN 1993-1-8:2005
English Version
Eurocode 3: Design of steel structures - Part 1-8: Design of
joints

Eurocode 3: Calcul des structures en acier - Partie 1-8 : Eurocode 3: Bemessung und Konstruktion von

Calcul des assemblages Stahlbauten - Teil 1-8: Bemessung von Anschlüssen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 250.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

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

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1993-1-8:2021 E

worldwide for CEN national Members.
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Contents Page

European foreword ....................................................................................................................................................... 6

Introduction .................................................................................................................................................................... 7

1 Scope ................................................................................................................................................................. 10

1.1 Scope of EN 1993-1-8 .................................................................................................................................. 10

1.2 Assumptions ................................................................................................................................................... 10

2 Normative references ................................................................................................................................. 10

3 Terms, definitions and symbols .............................................................................................................. 11

3.1 Terms and definitions ................................................................................................................................ 11

3.2 Symbols and abbreviations ...................................................................................................................... 13

4 Basis of design ............................................................................................................................................... 33

4.1 General requirements ................................................................................................................................ 33

4.2 Design assumptions .................................................................................................................................... 33

4.3 Structural properties of joints ................................................................................................................. 34

4.3.1 General ............................................................................................................................................................. 34

4.3.2 Partial factors ................................................................................................................................................ 34

4.4 Fasteners with different stiffness........................................................................................................... 35

4.5 Joints loaded in shear subject to impact, vibration and/or load reversal ............................... 35

4.6 Eccentricity at intersections..................................................................................................................... 35

5 Connections using bolts, rivets or pins ................................................................................................ 36

5.1 Bolts, nuts and washers ............................................................................................................................. 36

5.1.1 Property classes ............................................................................................................................................ 36

5.1.2 Preloaded bolts ............................................................................................................................................. 36

5.2 Rivets ................................................................................................................................................................ 37

5.3 Anchor bolts ................................................................................................................................................... 37

5.4 Bolted connections ...................................................................................................................................... 37

5.4.1 Categories of bolted connections ........................................................................................................... 37

5.4.2 Injection bolts ................................................................................................................................................ 38

5.4.3 Hybrid connections ..................................................................................................................................... 38

5.4.4 Pin connections ............................................................................................................................................. 38

5.4.5 Connections with lug angles ..................................................................................................................... 39

5.5 Design checks ................................................................................................................................................ 40

5.5.1 Design checks for bolted connections .................................................................................................. 40

5.5.2 Design checks for connections with injection bolts......................................................................... 42

5.5.3 Design checks for pin connections ......................................................................................................... 43

5.6 Positioning of holes for bolts and rivets .............................................................................................. 44

5.7 Design resistance of individual fasteners subjected to shear, bearing and/or tension ..... 47

5.7.1 Bolts and rivets in normal round, oversize or slotted holes ........................................................ 47

5.7.2 Fit bolts ............................................................................................................................................................ 52

5.7.3 Long joints ...................................................................................................................................................... 52

5.7.4 Bolts in threaded holes .............................................................................................................................. 53

5.7.5 Injection bolts ................................................................................................................................................ 54

5.7.6 Prying forces .................................................................................................................................................. 55

5.8 Design resistance of a group of fasteners loaded in bearing and shear ................................... 56

5.9 Design slip resistance ................................................................................................................................. 56

5.9.1 General ............................................................................................................................................................. 56

5.9.2 Combined tension and shear ................................................................................................................... 57

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5.10 Design block tearing resistance .............................................................................................................. 57

5.11 Design resistance of angles connected by one leg and other asymmetrically

connected members in tension................................................................................................................ 59

5.12 Distribution of forces between fasteners at ultimate limit states .............................................. 60

6 Welded connections..................................................................................................................................... 61

6.1 General ............................................................................................................................................................. 61

6.2 Welding consumables ................................................................................................................................. 61

6.3 Geometry and dimensions ......................................................................................................................... 61

6.3.1 Type of weld.................................................................................................................................................... 61

6.3.2 Fillet welds ...................................................................................................................................................... 62

6.3.3 Fillet welds all round ................................................................................................................................... 63

6.3.4 Butt welds ........................................................................................................................................................ 63

6.3.5 Plug welds........................................................................................................................................................ 64

6.3.6 Flare groove welds ....................................................................................................................................... 64

6.4 Welds with packings .................................................................................................................................... 64

6.5 Design resistance of fillet welds .............................................................................................................. 65

6.5.1 Length of welds .............................................................................................................................................. 65

6.5.2 Design throat thickness .............................................................................................................................. 65

6.5.3 Design resistance of fillet welds .............................................................................................................. 66

6.6 Design resistance of fillet welds all round ........................................................................................... 69

6.7 Design resistance of butt welds ............................................................................................................... 69

6.7.1 Full penetration butt welds....................................................................................................................... 69

6.7.2 Partial penetration butt welds................................................................................................................. 69

6.7.3 T-butt joints .................................................................................................................................................... 70

6.8 Design resistance of plug welds .............................................................................................................. 71

6.9 Distribution of forces .................................................................................................................................. 71

6.10 Connections to unstiffened flanges ........................................................................................................ 72

6.11 Design resistance of long joints ............................................................................................................... 73

6.12 Eccentrically loaded single fillet or single-sided partial penetration butt welds ................. 74

6.13 Angles connected by one leg ..................................................................................................................... 74

6.14 Welding in cold-formed zones ................................................................................................................. 75

7 Structural analysis ....................................................................................................................................... 75

7.1 Global analysis ............................................................................................................................................... 75

7.1.1 General ............................................................................................................................................................. 75

7.1.2 Elastic global analysis ................................................................................................................................. 75

7.1.3 Rigid-plastic global analysis ..................................................................................................................... 76

7.1.4 Elastic-plastic global analysis................................................................................................................... 77

7.1.5 Global analysis of hollow section lattice girders ............................................................................... 77

7.2 Modelling of beam-to-column joints ...................................................................................................... 79

7.2.1 Scope of application ..................................................................................................................................... 79

7.2.2 General approach ......................................................................................................................................... 80

7.2.3 Simplified approach ..................................................................................................................................... 81

7.2.4 Design moment-rotation curve ............................................................................................................... 83

7.2.5 Moment resistance ....................................................................................................................................... 83

7.2.6 Rotational stiffness ...................................................................................................................................... 84

7.2.7 Rotation capacity .......................................................................................................................................... 84

7.3 Classification of joints ................................................................................................................................. 85

7.3.1 General ............................................................................................................................................................. 85

7.3.2 Classification by rotational stiffness ...................................................................................................... 85

7.3.3 Classification by moment resistance ..................................................................................................... 87

8 Structural joints connecting H or I sections ........................................................................................ 88

8.1 General ............................................................................................................................................................. 88

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8.2 Structural properties .................................................................................................................................. 91

8.3 Equivalent T-stub in tension .................................................................................................................... 92

8.3.1 Application ..................................................................................................................................................... 92

8.3.2 Modes of failure ............................................................................................................................................ 93

8.3.3 Total effective length .................................................................................................................................. 93

8.3.4 Design tension resistance ......................................................................................................................... 93

8.3.5 Individual bolt rows, bolt groups and groups of bolt rows ........................................................... 96

8.4 Equivalent T-stub in compression ......................................................................................................... 96

8.4.1 Application ..................................................................................................................................................... 96

8.4.2 Total effective length and width ............................................................................................................. 96

8.4.3 Design compression resistance............................................................................................................... 97

9 Hollow section joints................................................................................................................................... 98

9.1 General ............................................................................................................................................................. 98

9.1.1 Scope ................................................................................................................................................................. 98

9.1.2 Field of application ...................................................................................................................................... 99

9.2 Design ............................................................................................................................................................. 100

9.2.1 General ........................................................................................................................................................... 100

9.2.2 Failure modes for hollow section joints ............................................................................................. 101

9.2.3 Definition of joint type for design ........................................................................................................ 104

9.3 Welds .............................................................................................................................................................. 106

9.3.1 Design resistance ....................................................................................................................................... 106

9.4 Welded joints between brace members and CHS chords ............................................................ 106

9.4.1 General ........................................................................................................................................................... 106

9.4.2 Uniplanar joint configurations .............................................................................................................. 107

9.4.3 Multiplanar joint configurations .......................................................................................................... 114

9.5 Welded joints between CHS or RHS brace members, and RHS chord members ................. 115

9.5.1 General ........................................................................................................................................................... 115

9.5.2 Uniplanar joint configurations .............................................................................................................. 116

9.5.3 Multiplanar joint configurations .......................................................................................................... 127

9.6 Welded joints between CHS or RHS brace members, and I or H section chords ................. 129

9.7 Welded overlap joints between CHS or RHS brace members, and CHS, RHS, I, H or

channel section chord members ........................................................................................................... 132

Annex A (normative) Structural properties of basic components ........................................................ 137

A.1 Use of this annex ......................................................................................................................................... 137

A.2 Scope and field of application ................................................................................................................ 137

A.3 General ........................................................................................................................................................... 137

A.4 Column web panel in shear .................................................................................................................... 137

A.5 Column web in transverse compression............................................................................................ 140

A.6 Column web in transverse tension ...................................................................................................... 144

A.7 Column flange in bending........................................................................................................................ 146

A.8 End plate in bending ................................................................................................................................. 150

A.9 Flange cleat in bending ............................................................................................................................ 153

A.10 Beam or column flange and web in compression ........................................................................... 154

A.11 Beam web in tension ................................................................................................................................. 155

A.12 Plate in tension or compression ........................................................................................................... 155

A.13 Bolts in tension ........................................................................................................................................... 155

A.14 Bolts in shear ............................................................................................................................................... 155

A.15 Bearing at bolt holes ................................................................................................................................. 156

A.16 Concrete and base plate in compression ........................................................................................... 158

A.17 Base plate in bending under tension .................................................................................................. 158

A.18 Anchor bolt in tension .............................................................................................................................. 159

A.19 Anchoring components in tension ....................................................................................................... 160

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A.20 Anchor bolts in shear ............................................................................................................................... 161

A.21 Anchoring components in shear .......................................................................................................... 161

A.22 Welds .............................................................................................................................................................. 161

A.23 Beam haunch ............................................................................................................................................... 162

Annex B (normative) Design of moment-resisting beam-to-column joints and splices............... 163

B.1 Use of this annex ........................................................................................................................................ 163

B.2 Scope and field of application ............................................................................................................... 163

B.3 Design resistance ....................................................................................................................................... 163

B.4 Rotational stiffness ................................................................................................................................... 169

B.5 Rotation capacity ....................................................................................................................................... 172

Annex C (Normative) Design of nominally pinned connections ........................................................... 175

C.1 Use of this annex ........................................................................................................................................ 175

C.2 Scope and field of application ............................................................................................................... 175

C.3 Ductility and rotation capacity requirements ................................................................................. 176

C.4 Design resistances ..................................................................................................................................... 178

Annex D (normative) Design of column bases ............................................................................................. 191

D.1 Use of this annex ........................................................................................................................................ 191

D.2 Scope and field of application ............................................................................................................... 191

D.3 Design resistance ....................................................................................................................................... 191

D.4 Rotational stiffness ................................................................................................................................... 194

Bibliography .....................................................
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