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Design of Steel Structures for Buildings in Seismic Areas: Eurocode 8: Design of Structures for Earthquake Resistance. Part 1: General Rules, Seismic Action and Rules for Buildings

Design of Steel Structures for Buildings in Seismic Areas: Eurocode 8: Design of Structures for Earthquake Resistance. Part 1: General Rules, Seismic Action and Rules for Buildings

ECCS - European Convention for Constructional Steelwork, Associação Portuguesa de Construção

ISBN: 978-3-433-60921-7

May 2018

350 pages

$60.99

Description

This volume elucidates the design criteria and principles for steel structures under seismic loads according to Eurocode 8-1. Worked Examples illustrate the application of the design rules. Two case studies serve as best-practice samples.

FOREWORD XIII

PREFACE XVII

Chapter 1 SEISMIC DESIGN PRINCIPLES IN STRUCTURAL CODES 1

1.1 Introduction 1

1.2 Fundamentals of seismic design 2

1.2.1 Capacity design 2

1.2.2 Seismic design concepts 6

1.3 Codification of seismic design 11

1.3.1 Evolution of seismic design codes 11

1.3.2 New perspectives and trends in seismic codification 19

Chapter 2 EN 1998-1: GENERAL AND MATERIAL INDEPENDENT PARTS 25

2.1 Introduction 25

2.2 Performance requirements and compliance criteria 27

2.2.1 Fundamental requirements 27

2.2.2 Ultimate limit state 32

2.2.3 Damage limitation state 34

2.2.4 Specific measures 35

2.3 Seismic action 36

2.3.1 The fundamentals of the dynamic model 36

2.3.2 Basic representation of the seismic action 40

2.3.3 The seismic action according to EN 1998-1 46

2.3.4 Alternative representations of the seismic action 52

2.3.5 Design spectrum for elastic analysis 54

2.3.6 Combinations of the seismic action with other types of actions 56

2.4 Characteristics of earthquake resistant buildings 58

2.4.1 Basic principles of conceptual design 58

2.4.2 Primary and secondary seismic members 60

2.4.3 Criteria for structural regularity 61

2.5 Methods of structural seismic analysis 70

2.5.1 Introduction 70

2.5.2 Lateral force method 72

2.5.3 Linear modal response spectrum analysis 75

2.5.4 Nonlinear static pushover analysis 84

2.5.5 Nonlinear time-history dynamic analysis 90

2.6 Structural modelling 94

2.6.1 Introduction 94

2.6.2 Modelling of masses 96

2.6.3 Modelling of damping 98

2.6.4 Modelling of structural mechanical properties 101

2.7 Accidental torsional effects 107

2.7.1 Accidental eccentricity 107

2.7.2 Accidental torsional effects in the lateral force method of analysis 109

2.7.3 Accidental torsional effects in modal response spectrum analysis 110

2.7.4 Accidental torsional effects in nonlinear static pushover analysis 111

2.7.5 Accidental torsional effects in linear and nonlinear dynamic time history analysis 114

2.8 Combination of effects induced by different components of the seismic action 114

2.9 Calculation of structural displacements 117

2.10 Second order effects in seismic linear elastic analysis 118

2.11 Design verifications 121

2.11.1 Safety verifications 121

2.11.2 Damage limitation 126

Chapter 3 EN 1998-1: DESIGN PROVISIONS FOR STEEL STRUCTURES 129

3.1 Design concepts for steel buildings 129

3.2 Requirements for steel mechanical properties 133

3.2.1 Strength and ductility 133

3.2.2 Toughness 135

3.3 Structural typologies and behaviour factors 137

3.3.1 Structural types 137

3.3.2 Behaviour factors 141

3.4 Design criteria and detailing rules for dissipative structural behaviour common to all structural types 145

3.4.1 Introduction 145

3.4.2 Design rules for cross sections in dissipative members 145

3.4.3 Design rules for non-dissipative connections 147

3.4.4 Design rules and requirements for dissipative connections 148

3.4.5 Design rules and requirements for non-dissipative members 148

3.5 Design criteria and detailing rules for moment resisting frames 149

3.5.1 Code requirements for beams 149

3.5.2 Code requirements for columns 152

3.5.3 Code requirements for beam-to-column joints 153

3.6 Design criteria and detailing rules for concentrically braced frames 158

3.6.1 Code requirements for braces 158

3.6.2 Code requirements for beams and columns 162

3.7 Design criteria and detailing rules for eccentrically braced frames 164

3.7.1 Code requirements for seismic links 164

3.7.2 Code requirements for members not containing seismic links 171

3.7.3 Code requirements for connections of the seismic links 172

Chapter 4 DESIGN RECOMMENDATIONS FOR DUCTILE DETAILS 173

4.1 Introduction 173

4.2 Seismic design and detailing of composite steel-concrete slabs 174

4.3 Ductile details for moment resisting frames 182

4.3.1 Detailing of beams 182

4.3.2 Detailing of beam-to-column joints 186

4.3.3 Detailing of column bases 210

4.4 Ductile details for concentrically braced frames 215

4.4.1 Introduction 215

4.4.2 Detailing of brace-to-beam/column joints 216

4.4.3 Detailing of brace-to-beam midspan connections 228

4.4.4 Detailing of brace-to-brace connections 230

4.4.5 Detailing of brace-to-column base connections 235

4.4.6 Optimal slope, constructional tolerances and local details for braces 236

4.5 Ductile details for eccentrically braced frames 239

4.5.1 Detailing of links 239

4.5.2 Detailing of link lateral torsional restraints 241

4.5.3 Detailing of diagonal brace-to-link connections 244

4.5.4 Detailing of link-to-column connections 245

Chapter 5 DESIGN ASSISTED BY TESTING 247

5.1 Introduction 247

5.2 Design assisted by testing according to EN 1990 248

5.2.1 Introduction 248

5.2.2 General overview of EN 1990 250

5.2.3 Testing 252

5.2.4 Derivation of design values 254

5.3 Testing of seismic components and devices 262

5.3.1 Introduction 262

5.3.2 Quasi-static monotonic and cyclic testing 262

5.3.3 Pseudo-dynamic testing 275

5.3.4 Dynamic testing 277

5.4 Application: experimental qualification of buckling restrained braces 278

5.4.1 Introduction and scope 278

5.4.2 Test specifications 279

5.4.3 Test specimens 280

5.4.4 Test setup and loading protocol for ITT 280

5.4.5 Results 281

5.4.6 Fabrication Production Control tests 283

Chapter 6 MULTI-STOREY BUILDING WITH MOMENT RESISTING FRAMES 285

6.1 Building description and design assumptions 285

6.1.1 Building description 285

6.1.2 Normative references 287

6.1.3 Materials 288

6.1.4 Actions 289

6.1.5 Pre-design 292

6.2 Structural analysis and calculation models 293

6.2.1 General features 293

6.2.2 Modelling assumptions 296

6.2.3 Numerical models and method of analysis 297

6.2.4 Imperfections for global analysis of frames 301

6.2.5 Frame stability and second order effects 303

6.3 Design and verification of structural members 304

6.3.1 Design and verification of beams 304

6.3.2 Design and verification of columns 310

6.3.3 Panel zone of beam-to-column joints 316

6.4 Damage limitation 319

6.5 Pushover analysis and assessment of seismic performance 320

6.5.1 Introduction 320

6.5.2 Modelling assumptions 321

6.5.3 Pushover analysis 328

6.5.4 Transformation to an equivalent SDOF system 331

6.5.5 Evaluation of the seismic demand 333

6.5.6 Evaluation of the structural performance 334

Chapter 7 MULTI-STOREY BUILDING WITH CONCENTRICALLY BRACED FRAMES 335

7.1 Building description and design assumptions 335

7.1.1 Building description 335

7.1.2 Normative references 337

7.1.3 Materials 337

7.1.4 Actions 338

7.1.5 Pre-design 340

7.2 Structural analysis and calculation models 342

7.2.1 General features 342

7.2.2 Modelling assumptions 342

7.2.3 Numerical models and method of analysis 344

7.2.4 Imperfections for global analysis of frames 348

7.2.5 Frame stability and second order effects 349

7.3 Design and verification of structural members 350

7.3.1 Design and verification of X-CBFs 350

7.3.2 Design and verification of inverted V-CBFs 357

7.4 Damage limitation 365

Chapter 8 MULTI-STOREY BUILDING WITH ECCENTRICALLY BRACED FRAMES 369

8.1 Building description and design assumptions 369

8.1.1 Building description 369

8.1.2 Normative references 371

8.1.3 Materials 371

8.1.4 Actions 372

8.2 Structural analysis and calculation models 374

8.2.1 General features 374

8.2.2 Modelling assumptions 375

8.2.3 Numerical models and method of analysis 376

8.2.4 Imperfections for global analysis of frames 380

8.2.5 Frame stability and second order effects 380

8.3 Design and verification of structural members 381

8.3.1 Design and verification of shear links 381

8.3.2 Design and verification of beam segments outside the link 384

8.3.3 Design and verification of braces 384

8.3.4 Design and verification of columns 385

8.4 Damage limitation 388

Chapter 9 CASE STUDIES 391

9.1 Introduction 391

9.2 The Bucharest Tower Centre International 393

9.2.1 General description 393

9.2.2 Design considerations 397

9.2.3 Detailing 421

9.2.4 Construction 422

9.3 Single storey Industrial Warehouse in Bucharest 432

9.3.1 General description 432

9.3.2 Design considerations 435

9.4 The Fire Station of Naples 449

9.4.1 General description 449

9.4.2 Design considerations and constructional details 456

9.4.3 The anti-seismic devices 467

REFERENCES 475