This book details the basic concepts and the design rules included in Eurocode 3

Design of steel structures: Part 1-8Design of jointsJoints in composite construction are also addressed through references to Eurocode 4Design of composite steel and concrete structuresPart 1-1: General rules and rules for buildings.

Attention has to be duly paid to the joints when designing a steel or composite structure, in terms of the global safety of the construction, and also in terms of the overall cost, including fabrication, transportation and erection. Therefore, in this book, the design of the joints themselves is widely detailed, and aspects of selection of joint configuration and integration of the joints into the analysis and the design process of the whole construction are also fully covered.

Connections using mechanical fasteners, welded connections, simple joints, moment-resisting joints and lattice girder joints are considered. Various joint configurations are treated, including beam-to-column, beam-to-beam, column bases, and beam and column splice configurations, under different loading situations (axial forces, shear forces, bending moments and their combinations).

The book also briefly summarises the available knowledge relating to the application of the Eurocode rules to joints under fire, fatigue, earthquake, etc., and also to joints in a structure subjected to exceptional loadings, where the risk of progressive collapse has to be mitigated.

Finally, there are some worked examples, plus references to already published examples and to design tools, which will provide practical help to practitioners.

Jean-Pierre Jaspart is professor of steel and composite constructions at Liege University, in Belgium. He is also involved in other teaching activities throughout Europe, and in particular in an Erasmus Mundus project, SUSCOS, together with five other top-level European universities in the field of steel construction. He carries out research in the following topics: stability and resistance of steel and composite structures, connection design in steel and composite constructions, and robustness of structural systems. In 1992, he won the Magnel Award. He is a member of the Technical Committee ?Connections? (TC10) of the ECCS and was chairman for several years of its sub-committee TWG10.2 ?Joints?. Together with the second author and the late Martin Steenhuis, he drafted large parts of the initial version of Eurocode 3 Part 1-8 (the so-called Annex JJ) and is currently a member of Working Group CEN/TC 250/SC 3/WG 8 for the evolution of Eurocode 3 Part 1-8. He has authored over 260 publications, including 50 papers in international journals and 20 contributions to books.

Klaus Weynand worked for ten years at the Institute of Steel Construction at the Technical University of Aachen, Germany, as a researcher and teacher. He has been involved in many international research projects, his research mainly focusing on joints in steel structures. In 1999, he founded, together with Markus Feldmann in Aachen, his own design office Feldmann+Weynand, where he is still a partner and the managing director. Since 1992, Klaus Weynand has been a member of the Technical Committee ECCS TC 10 and, since 1997, a technical expert in the Technical Commission of CIDECT. He was involved in drafting the pre-version of Eurocode 3 Part 1-8, together with Jean-Pierre Jaspart, co-author of this book, and the late Martin Steenhuis from Delft. He has prepared papers for various international conferences and journals and has published books for practitioners (e.g. design tables for standardised joints). He is currently also a member of the German Mirror Group for Eurocode 3 and a member of the Working Group CEN/TC 250/SC 3/WG 8 for the evolution of Eurocode 3 Part 1-8.

FOREWORD XIII

PREFACE XV

LIST OF SYMBOLS AND ABBREVIATIONS XIX

Chapter 1 INTRODUCTION 1

1.1 General 1

1.2 Definitions 12

1.3 Material Choice 26

1.4 Fabrication and erection 28

1.5 Costs 29

1.6 Design approaches 29

1.7 Design tools 39

1.8 Worked examples 44

Chapter 2 STRUCTURAL ANALYSIS AND DESIGN 47

2.1 Introduction 47

2.2 Joint modelling 51

2.3 Joint idealisation 60

2.4 Joint classification 63

2.5 Ductility classes 66

Chapter 3 CONNECTIONS WITH MECHANICAL FASTENERS 71

3.1 Mechanical fasteners 71

3.2 Categories of connections 73

3.3 Positioning of bolt holes 76

3.4 Design of the basic components 78

3.5 Design of connections 100

Chapter 4 WELDED CONNECTIONS 123

4.1 Type ofwelds 123

4.2 Constructive constraints 127

4.3 Design of welds 135

4.4 Distribution of forces in a welded joint 145

Chapter 5 SIMPLE JOINTS 153

5.1 Introduction 153

5.2 Steel joints 155

5.3 Composite joints 187

5.4 Column bases 189

Chapter 6 MOMENT RESISTANT JOINTS 205

6.1 Introduction 205

6.2 Component characterisation 206

6.3 Assembly for resistance 235

6.4 Assembly for rotational stiffness 257

6.5 Assembly for ductility 268

6.6 Application to steel beam-to-column joint configurations 272

6.7 Application to steel column splices 300

6.8 Application to column bases 303

6.9 Application to composite joints 314

Chapter 7 LATTICE GIRDER JOINTS 329

7.1 General 329

7.2 Scope and field of application 330

7.3 Design models 333

Chapter 8 JOINTS UNDER VARIOUS LOADING SITUATIONS 341

8.1 Introduction 341

8.2 Composite joints under sagging moment 342

8.3 Joints in fire 343

8.4 Joints under cyclic loading 344

8.5 Joints under exceptional events 346

Chapter 9 DESIGN STRATEGIES 349

9.1 Design opportunities for optimisation of joints and frames 349

9.2 Application procedures 364

BIBLIOGRAPHIC REFERENCES 375

Annex A Practical values for required rotation capacity 385

Annex B Values for lateral torsional buckling strength of a fin plate 387