Table of Contents
This is an abridged version of Prestressed Concrete, containing Chapters 1 to 4 and 9 only. Pages 144 to 246 are not in this book.
CHAPTER 1 Introduction ........................................ 1
The idea of prestressing .................................................................... 1
Prestressing as a design option ......................................................... 9
Use of high-strength tendons and cables ......................................... 12
Methods of prestressing .................................................................. ..15
Anchorage and bond of tendons ........................................................ 21
Cable profile and level of prestress ................................................... 22
References ...................................................................................... ..25
CHAPTER 2 Properties of materials .................... 27
Introduction ....................................................................................... 27
Properties of prestressing steel ....................................................... 29
Properties of reinforcing steel ........................................................ ..35
Strength properties of concrete ....................................................... 36
Short-term properties of concrete ................................................... 38
Shrinkage of concrete ..................................................................... .41
Creep of concrete under constant stress .........................................49
Concrete creep under varying stress .............................................. 57
References ...................................................................................... 67
CHAPTER 3 Methods of design and analysis .... 69
The structural design process ......................................................... 69
Design checks for prestressed concrete ..........................................70
Design criteria and structural reliability ......................................... ....72
AS 3600 design criteria for prestressed concrete ............................ 74
The critical stress method of design ................................................. 80
Methods of analysis for prestressed concrete .................................. 82
References ........................................................................................ 85
CHAPTER 4 Flexural behaviour of uncracked members ........................................... 87
Introduction .................................................................................... 87
Short-term behaviour of uncracked beams ...................................88
Equivalent load concept ................................................................. 98
Load balancing ............................................................................. 105
Effects of creep and shrinkage ..................................................... 109
Deflections of uncracked beams ................................................... 112
References .................................................................................... 143
CHAPTER 9 Loss of prestress ........................... 247
Types of losses .............................................................................. 247
Elastic Loss ................................................................................... 248
Duct Friction Loss ........................................................................ .250
Anchorage Slip .............................................................................. 252
Stress relaxation ............................................................................254
Shrinkage and creep losses according to AS 3600 .......................256
Step by step analysis of losses ......................................................264
References .................................................................................... 265