FOREWORD xiii
PREFACE xix
Chapter 1.Prestressed Steel Bridge Systems 1
1.1 Basic Idea of Steel Prestressing 1
1.2 Brief Historical Review 1
1.2.1 General Data 1
.1.2.2 Timber Bridges 3
1.2.3 Metal Bridges /3
1.3 Basic Concept of Steel Prestressing /8
1.4 Methods of Prestressing 11
1.4.1 Prestressing with Tendons /11
1.5 Economy by Prestressing 12
1.6 Analysis and Design of Prestressed Steel Structures 14
1.6.1 Overloading and Underloading Factors 14
1.6.2 Controlled Prestressing Force /15
1.6.3 Protection and Connections of Tendons to Structures 15
References /16
Chapter 2.Methods of Prestressing 17
2.1 Introduction /17
2.2 The Prestressing of Steel Members by Tendons 17
2.2.1 Members in Axial Tension 17
2.2.2 Prestressing of a Symmetrical I Beam 19
2.2.3 Prestressing of an Asymmetrical I Beam /20
2.2.4 Increment of Prestressing Force on an Eccentrically Stressed
Beam 20
2.2.5 Draped Tendons /23
2.2.6 Composite Prestressed Structures /25
2.2.7 Loss of Prestress 28
2.2.8 Shear/30
2.3 Beams Prestressed by Bending 31
2.3.1 Bending of Rolled Sections 31
2.3.2 Asymmetrical Beams /32
2.3.3 The Bending and Welding of High-Strength Cover Plates 33

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