Design aids for EC2: design of concrete structures : design aids for ENV 1992-1-1, Eurocode 2, Part 1

219 Pages·1996·24.75 MB·English

Design aids for EC2
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Design aids for EC2
Design of concrete structures
Design aids for ENV 1992–1–1 Eurocode 2, part 1
Betonvereniging
The Concrete Society
Deutscher Beton-Verein

E & FN SPON
An Imprint of Chapman & Hall
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Chapman & Hall, 2–6 Boundary Row, London SE1 8HN, UK
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First edition 1997
This edition published in the Taylor & Francis e-Library, 2005.
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© 1997 Betonvereniging, The Concrete Society and Deutscher Beton-Verein
ISBN 0-203-47639-5 Master e-book ISBN
ISBN 0-203-78463-4 (Adobe eReader Format)
ISBN 0 419 21190 X (Print Edition)
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Publisher’s Note This book has been prepared from camera ready copy provided by
Betonvereniging, The Concrete Society and Deutscher Beton-Verein E.V.
Contents
Preface 1
1 General information 2
1.1 Construction products directive and European harmonized standards for concrete structures
1.2 Future European code of practice for concrete structures
1.3 Safety concept relevant to any type of construction material
1.4 Eurocode 2 for the design and execution of concrete structures
1.4.1 General
1.4.2 Contents of Eurocode 2: principles and application rules: indicative numerical values
1.4.3 Essential requirements for design and execution
1.5 References
2 Mains symbols used in EC2 7
3 Overview of flow charts 12
4 Design requirements 40
4.1 Combinations of actions
4.2 Categories and values of imposed loads
4.3 (cid:0)Ψ factors (Eurocode 1, part 2.1 (ENV 1991–2–1))
4.4 Partial safety factors for actions
4.5 Partial safety factors for materials
5 Calculation methods 46
5.1 Flat slabs
5.1.1 Introduction
5.1.2 Equivalent frame method
5.1.3 Use of simplified coefficients
5.1.4 Reinforcement
5.2 Strut-and-tie methods
6 Material properties 50
6.1 Concrete
6.2 Reinforcing steel
6.3 Prestressing steel
7 Basic design 53
7.1 Exposure classes
7.2 Minimum cover requirements for normal weight concrete
vi
7.3 Durability requirements related to environmental exposure
7.4 Strength classes to satisfy maximum water/cement ratio requirements
7.5 Prestressed concrete
7.5.1 Material properties
7.5.2 Minimum number of tendons
7.5.3 Initial prestressing force
7.5.4 Loss of prestress
7.5.5 Anchorage
8 Bending and longitudinal force 59
8.1 Conditions at failure
8.2 Design of rectangular sections subject to flexure only
8.3 Flanged beams
8.4 Minimum reinforcement
8.5 Design charts for columns (combined axial and bending)
9 Shear and torsion 95
9.1 Shear
9.1.1 General
9.1.2 V /b d
Rd1 w
9.1. 3a Standard method V /b d
Rd2 w
9.1.3 b Variable strut inclination method V /b d
Rd2 w
9.1.4 V . /V
Rd2red Rd2
9.1.5 V /d and V /d
wd Rd3
9.2 Torsion
9.2.1 General
9.2.2 T /h3
Rd2
9.2. 3a T /h2
Rd2
9.2.3b T /h2
Rd2
9.2. 3c T /h2
Rd2
9.2. 3c T /h3
Rd2
9.3 Combination of torsion and shear
10 Punching 107
10.1 General
10.2a V /d for circular loaded areas
Sd
vii
10.2b V /d for rectangular loaded areas
Sd
10.3 V /d
Rd1
10.4a V /d–V /d
Rd3 Rd1
10.4b V /d–V /d rectangular loaded areas
Rd3 Rd1
11 Elements with second order effects 115
11.1 Determination of effective length of columns
12 Control of cracking 119
13 Deflections 127
13.1 General
13.2 Ratios of span to effective depth
13.3 Calculation of deflection
14 Detailing 131
14.1 Bond conditions
14.2 Anchorage and lap lengths
14.3 Transverse reinforcement
14.4 Curtailment of bars in flexural members
15 Numerical examples designed to ENV 1992–1–1 135
15.1 Introduction
15.2 References
15.3 Calculation for an office building
15.3.1 Floor plan, structural details and basic data
15.3. 1.1 Floor plan of an office building
15.3. 1.2 Structural details of an office building

15.3. 1.3 Basic data of structure, materials and loading
15.3.2 Calculation of a flat slab
15.3. 2.1 Actions
15.3. 2.2 Structural model at the ultimate limit states (finite element grid)
15.3. 2.3 Design values of bending moments (example)
15.3. 2.4 Design of bending at the ultimate limit states
15.3. 2.5 Ultimate limit state for punching shear
viii
15.3.2 .6 Limitation of deflections
15.3. 3 Internal column
15.3. 4 Facade element
15.3. 5 Block foundation
15.4 Calculation for a residential building
15.4.1 .2 Basic data of structure, materials and loading
15.4. 2 Continuous slab (end span)
15.4.2 .1 Floor span and idealization of the structure
15.4.2 .2 Limitation of deflections
15.4.2 .3 Actions
15.4.2 .4 Structural analysis
15.4.2 .5 Design at ultimate limit states for bending and axial force
15.4.2 .6 Design for shear
15.4.2 .7 Minimum reinforcement for crack control
15.4.2 .8 Detailing of reinforcement

15.4. 3 Continuous edge beam (end span)
15.4.3 .1 Structural system
15.4.3 .2 Actions
15.4.3 .3 Structural analysis
15.4.3 .4 Design of span 1 for bending
15.4.3 .5 Design for shear
15.4.3 .6 Control of cracking
15.4.3 .7 Detailing of reinforcement
ix
15.4. 4 Braced tranverse frame in axis E
15.4. 4.1 Structural system; cross-sectional dimensions
15.4. 4.2 Actions
15.4. 4.3 Structural analysis
15.4. 4.4 Design for the ultimate limit states
15.5. 1 Floor plan; elevation
15.5. 2 Calculation of prestressed concrete beam
15.5. 2.1 Basic data
15.5. 2.2 Actions
15.5. 2.3 Action effects due to G G and Q
k,19 k,2 k
15.5. 2.4 Action effects due to prestress
15.5. 2.5 Design for the ultimate limit states for bending and longitudinal force
15.5. 2.6 Design for shear
15.5. 3 Calculation of edge column subjected to crane-induced actions
15.5. 3.1 Basic data and design value of actio ns
15.5. 3.2 Design values of actions
15.5. 3.3 Design of the column for the ultimate limit states induced by structural deformations
15.5. 3.4 Designs of the column; detailing of reinforcement
15.5. 3.5 Ultimate limit state of fatigue
15.6 Guidance for the calculation of the equivalent stress range (cid:0) (cid:0) for reinforcing steel and of the S-N curve for
s,equ
concrete and of the S-N curve for concrete in compression using the single load level method
15.6. 1 Reinforcing steel
15.6. 2 Concrete