4.2 - VSL

Foreword
With the publication of this technical report, VSL
INTERNATIONAL LTD is pleased to make a
contribution to the development of Civil
Engineering.
The research work carried out throughout the
world in the field of post-tensioned slab
structures and the associated practical
experience have been reviewed and analysed
in order to etablish the recommendations and
guidelines set out in this report. The document
is intended primarily for design engineers,
but we shall be very pleased if it is also of use
to contractors and clients. Through our
Berne, January 1985
Table of contents
Page
1. lntroduction 2
1.1. General 2
1.2. Historical review 2
1.3. Post-tensioning with or
without bonding of tendons 3
1.4. Typical applications of
post-tensioned slabs 4
2. Fundamentals of the design process 6
2.1. General 6
2.2. Research 6
2.3. Standards 6
3. Ultimate limit state 6
3 1 Flexure 6
3.2 Punching shear 9
4. Serviceability limit state 11
41 Crack limitation 11
42. Deflections 12
43 Post-tensioning force in
the tendon 12
44 Vibrations 13
45 Fire resistance 13
4Z Corrosion protection 13
representatives we offer to interested parties
throughout the world our assistance end
support in the planning, design and construction
of posttensioned buildings in general and posttensioned
slabs in particular.
I would like to thank the authors and all those
who in some way have made a contribution to
the realization of this report for their excellent
work. My special thanks are due to Professor Dr
B. Thürlimann of the Swiss Federal Institute of
Technology (ETH) Zürich and his colleagues,
who were good enough to reed through and
critically appraise the manuscript.
Hans Georg Elsaesser
Chairman of the Board and President
If VSLINTERNATIONALLTD
Page
5. Detail design aspects 13
5.1. Arrangement of tendons 13
5.2. Joints
6.Construction procedures 16
6.1.General 16
6.2. Fabrication of the tendons 16
6.3.Construction procedure for
bonded post-tensioning 16
6.4.Construction procedure for
unbonded post-tensioning 17
7. Preliminary design 19
8. Execution of the calculations 20
8.1. Flow diagram 20
8.2. Calculation example 20
9. Completed structures 26
9.1.Introduction 26
9.2.Orchard Towers, Singapore 26
9.3. Headquarters of the Ilford Group,
Basildon, Great Britain 28
9.4.Centro Empresarial, São Paulo,
Brazil 28
Page
9.5. Doubletree Inn, Monterey,
California,USA 30
9.6. Shopping Centre, Burwood,
Australia 30
9.7. Municipal Construction Office
Building, Leiden,Netherlands 31
9.8.Underground garage for ÖVA
Brunswick, FR Germany 32
9.9. Shopping Centre, Oberes Murifeld/Wittigkooen,
Berne,
Switzerland 33
9.10. Underground garage Oed XII,
Lure, Austria 35
9.11. Multi-storey car park,
Seas-Fee, Switzerland 35
9.12. Summary 37
10. Bibliography 38
Appendix 1: Symbols/ Definitions/
Dimensional units/
Signs 39
Appendix 2: Summary of various
standards for unbonded
post-tensioning 41
1