Assessment of EC8 Provisions for Seismic Design of Steel Structures

ECCS TC13 Seismic

Design

Assessment of EC8 Provisions for Seismic

Design

of Steel Structures 1st Edition, 2013

Editor Raffaele Landolfo

ECCS

CECM E

K

S

Assessment of EC8 Provisions for Seismic Design of Steel Structures | ix

CONTENTS

CONTENTS PREFACE

jjj

SYMBOLOGY

CONTENTS 1.

2.

3.

4.

v

ix

MATERIAL OVERSTRENGTH

1

1.1

Current rules in EN 1998-1

1

1.2

Comments

1

1.3

Future needs

5

1.4

References

6

SELECTION OF STEEL OF TOUGHNESS

7

2.1

Current rules in EN 1998-1

7

2.2

Comments

7

2.3

Future needs

9

2.4

References

9

LOCAL DUCTILITY

11

3.1

Current rules in EN 1998-1

11

3.2

Comments

11

3.3

Future needs

11

3.4

References

13

DESIGN RULES FOR CONNECTIONS IN DISSIPATIVE ZONES

15

4.1

Current rules in EN 1998-1

15

4.2

Comments

16

Assessment of EC8 Provisions for Seismic

I

x

Design

of Steel Structures

CONTENTS

5.

6.

7.

8.

4.2.1

Dissipative

4.2.2

Deformation

4.2.3

Concrete slab in plastic hinge region

19

4.2.4

Lateral restraint in the

19

4.2.5

Brace connections

zones

in moment

capacity

of

resisting frames

16

plastic hinge regions

17

plastic hinge region

20

4.3

Future Needs

20

4.4

References

21

NEW LINKS IN ECCENTRICALLY BRACED FRAMES

23

5.1

23

Current rules in EN 1998-1

5.2

Comments

23

5.3

Future needs

23

5.4

References

24

BEHAVIOUR FACTORS

25

6.1

Current rules in EN 1998-1

25

6.2

Comments

25

6.3

Future needs

27

6.4

References

27

CAPACITY-DESIGN RULES

29

7.1

Current rules in EN 1998-1

29

7.2

Comments

32

7.2.1

Capacity design

7.2.2

Shear force capacity design of beams in MRFs

34

7.2.3

Columns with plastic hinges in MRFs

35

7.2.4

Design

rules for

of column base

non-dissipative

anchoring

members

32

35

7.3

Future needs

36

7.4

References

36

DESIGN OF CONCENTRICALLY BRACED FRAMES

39

8.1

Current rules in EN 1998-1

39

8.2

Comments

39

Assessment of EC8 Provisions for Seismic Design of Steel Structures

|

xi

CONTENTS

9.

10.

11.

12.

8.3

Future needs

41

8.4

References

42

DUAL STRUCTURES: MRFS COMBINED WITH CBFS/EBFS

43

9.1

Current rules in EN 1998-1

43

9.2

Comments

43

9.3

Future needs

44

9.4

References

44

DRIFT LIMITATIONS AND SECOND-ORDER EFFECTS

45

10.1

Current rules in EN 1998-1

45

10.2

Comments

46

10.3

Future needs

48

10.4

References

48

NEW STRUCTURAL TYPES

51

11.1

Current rules in EN 1998-1

51

11.2

Comments

51

11.3

Future needs

53

11.4

References

54

LOW-DISSIPATIVE STRUCTURES

55

12.1

Current rules in EN 1998-1

55

12.2

Comments

55

12.3

Future needs

56

12.4

References

57

ANNEX 1- PROVISIONS OF FRENCH NATIONAL ANNEX RELATED TO TOUGHNESS REQUIREMENTS IN SEISMIC DESIGN

61