Chapter 1 INTRODUCTION 1.1 Characteristics of Steel Structures 1.1.1 Advantages 1.1.2 Disadvantages 1.2 Development History of Steel Structures 1.3 Applications of Steel Structures 1.4 Classification of Structural Steel Members 1.5 The Basic Design Method of Steel Structures 1.5.1 The purpose of steel structure design 1.5.2 Probabilistic limit state design method 1.5.3 Design expression 1.6 Chapter Summary Questions Chapter 2 STRUCTURAL STEEL 2.1 Introduction 2.2 Several Important Performance Indexes of Structural Steel 2.2.1 Strength performance 2.2.2 Plastic performance 2.2.3 Steel physical performance index 2.2.4 Cold bending performance 2.2.5 Impact toughness 2.2.6 Structural steel weldability 2.3 Stress-Strain Relationship of Structural Steel under Different Loadings 2.4 Performance of Steel under Complex Stress 2.5 Main Factors Affecting the Performance of Structural Steel 2.5.1 Chemical compositions of steel 2.5.2 Production process 2.5.3 Steel hardening 2.5.4 Temperature 2.5.5 Stress concentration 2.6 Types and Specifications of Structural Steel 2.6.1 Classification of steel in China 2.6.2 The choice principles of structural steel 2.6.3 Steel selection recommendations 2.7 Structural Steel Products in China 2.7.1 Hot-rolled steel products in China 2.7.2 Cold-formed steel shapes in China 2.8 Chapter Summary Questions Chapter 3 POSSIBLE FAILURE OF STEEL STRUCTURES 3.1 Introduction 3.2 The Strength Failure of Steel Structures 3.2.1 The strength failure of tension members 3.2.2 The strength failure of bending members 3.3 Overall Instability Failure of Steel Structures 3.3.1 Aspects that must be considered 3.3.2 Overall instability of steel structures 3.3.3 Overall instability of steel members 3.4 Local Instability Failure of Steel Structures 3.4.1 Local instability of steel structures