4.2 - VSL

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Authors Dr. P. Ritz, Civil Engineer ETH P. Matt, Civil Engineer ETH Ch. Tellenbach, Civil Engineer ETH P. Schlub, Civil Engineer ETH H. U. Aeberhard, Civil Engineer ETH Copyright VSL INTERNATIONAL LTD, Berne/Swizerland All rights reserved Printed in Switzerland
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
Page 1: 4.2 VSL REPORT SERIES POST-TENSIONE
Page 5 and 6: Intensive research work, especially
Page 7 and 8: Figure 12: Office and factory build
Page 9 and 10: The condition to be fulfilled at fa
Page 11 and 12: Figure 29: Determining failure mech
Page 13 and 14: 4. Serviceability limit state 4.1.
Page 15 and 16: Relaxation losses: The stress losse
Page 17 and 18: - Ultimate limit state (safety) - H
Page 19 and 20: 2. Fitting of end formwork; placing
Page 21 and 22: 7. Preliminary design In the design
Page 23 and 24: Figure 59: Plan showing dimensions
Page 25 and 26: Figure 65: influence of wedge draw-
Page 27 and 28: Figure 67: Tendon and reinforcement
Page 29 and 30: Figure 68: The Orchard Towers short
Page 31 and 32: Figure 74: The Centro Empresarial (
Page 33 and 34: Structural arrangement The building
Page 35 and 36: Figure 93: Section II during constr
Page 37 and 38: three strands were combined into bu
Page 39 and 40: anchorage into sections of 46.3 and
Page 41 and 42: Appendix 1: Symbols/ Definitions/ D
Page 43 and 44: Appendix 2: Summary of various stan

4.2 - VSL

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