Manual for the design of reinforced concrete building structures to EC2 (KEBT0014)

Manual for the design of reinforced concrete building structures to EC2, CONTENTS:

1 Introduction

1.1 Aims of the Manual

1.2 Eurocode system

1.3 Scope of the Manual

1.4 Contents of the Manual

2 General principles

2.1 General

2.2 Stability

2.3 Robustness

2.4 Movement joints

2.5 Fire resistance and durability

3 Design principles – reinforced concrete

3.1 Loading

3.2 Limit states

3.2.1 Ultimate limit state

3.2.2 Serviceability limit states

3.3 Material and design stresses

4 Initial design – reinforced concrete

4.1 Introduction

4.2 Loads

4.3 Material properties

4.4 Structural form and framing

4.5 Fire resistance and durability

4.6 Stiffness

4.7 Sizing

4.7.1 Introduction

4.7.2 Loading

4.7.3 Width of beams and ribs

4.7.4 Sizes and reinforcement of columns

4.7.5 Walls

4.7.6 Shear in flat slabs at columns

4.7.7 Adequacy of chosen sections to accommodate the reinforcement

4.7.7.1 Bending moments and shear forces

4.7.7.2 Provision of reinforcement

4.8 The next steps

4.9 Reinforcement estimates

5 Final design

5.1 Introduction

5.1.1 Checking of all information

5.1.2 Preparation of a list of design data

5.1.3 Amendment of drawings as a basis for final calculations

5.1.4 Final design calculations

5.2 Slabs

5.2.1 Introduction

5.2.2 Fire resistance and durability

5.2.2.1 Fire resistance

5.2.2.2 Durability

5.2.3 Bending moments and shear forces

5.2.3.1 General

5.2.3.2 One-way spanning slabs

5.2.3.3 Two-way spanning slabs on linear supports

5.2.3.4 Flat slabs

5.2.4 Section design – solid slabs

5.2.4.1 Bending

5.2.4.2 Shear

5.2.4.3 Openings

5.2.5 Span/effective depth ratios

5.2.6 Section design – ribbed and coffered slabs

5.2.6.1 Bending

5.2.6.2 Span/effective depth ratios

5.2.6.3 Shear

5.2.6.4 Beam strips in ribbed and coffered slabs

5.2.7 Notes on the use of precast floors

5.3 Structural frames

5.3.1 Division into subframes

5.3.2 Elastic analysis

5.3.3 Redistribution of moments

5.3.4 Design shear forces

5.4 Beams

5.4.1 Introduction

5.4.2 Fire resistance and durability

5.4.2.1 Fire resistance

5.4.2.2 Durability

5.4.3 Bending moments and shear forces

5.4.4 Section design

5.4.4.1 Bending

5.4.4.2 Minimum and maximum amounts of reinforcement

5.4.4.3 Shear

5.4.5 Span/effective depth ratios

5.5 Columns

5.5.1 Introduction

5.5.2 Slenderness, fire resistance and durability

5.5.2.1 Slenderness

5.5.2.2 Fire resistance

5.5.2.3 Durability

5.5.3 Axial loads and moments – non-slender columns

5.5.4 Axial loads and moments – slender columns

5.5.4.1 General

5.5.4.2 Calculation of first-order moments

5.5.4.3 Calculation of the ultimate deflection

5.5.5 Section design

5.5.6 Reinforcement

5.6 Walls

5.6.1 Introduction

5.6.2 Slenderness, fire resistance and durability

5.6.2.1 Slenderness

5.6.2.2 Fire resistance

5.6.2.3 Durability

5.6.3 Axial load and moments

5.6.3.1 In-plane bending

5.6.3.2 Bending at right-angles to the walls

5.6.3.3 Slender walls

5.6.4 Section design

5.6.4.1 Walls not subject to significant bending at rightangles to the wall

5.6.4.2 Intersecting walls

5.6.5 Reinforcement

5.6.6 Openings in shear and core walls

5.7 Staircases

5.7.1 Introduction

5.7.2 Fire resistance, durability and concrete grades

5.7.3 Bending moments and shear forces

5.7.4 Effective spans

5.7.4.1 Stairs spanning between beams or walls

5.7.4.2 Stairs spanning between landing slabs

5.7.4.3 Stair with open wells

5.7.5 Span/effective depth ratios

5.7.6 Section design

5.8 Design of non-suspended ground floor slabs

5.9 Guidance for the design of basement walls

5.9.1 General

5.9.2 Bending moments and shear forces

5.9.3 Section design

5.9.4 Foundation

5.9.5 Reinforcement

5.10 Foundations

5.10.1 Introduction

5.10.2 Durability and cover

5.10.3 Types of foundation

5.10.4 Plan area of foundations

5.10.5 Design of spread footings

5.10.5.1 Axially loaded unreinforced pad footings

5.10.5.2 Axially loaded reinforced pad footings

5.10.5.3 Eccentrically loaded footings

5.10.6 Design of other footings

5.10.6.1 Strip footings

5.10.6.2 Combined footings and balanced footings

5.10.7 Reinforcement

5.10.8 Design of rafts

5.10.9 Design of pile caps

5.10.10 Reinforcement in pile caps

5.11 Robustness

5.11.1 General

5.11.2 Tie forces and arrangements

5.12 Detailing

5.12.1 General

5.12.2 Bond conditions

5.12.3 Anchorage and lap lengths

5.12.4 Transverse reinforcement

5.12.5 Additional rules for high-bond bars exceeding 32mm in diameter

5.12.6 Curtailment of bars in flexural members

5.12.7 Corbels and nibs

6 Design principles – prestressed concrete

6.1 Introduction

6.2 Loading

6.3 Limit states

6.3.1 Ultimate limit state

6.3.2 Serviceability limit states

6.4 Materials, prestressing components and design stresses

7 Initial design – prestressed concrete

7.1 Introduction

7.2 Loads

7.3 Material properties

7.4 Structural form and framing

7.5 Fire resistance and durability

7.6 Stiffness

7.6.1 Slabs

7.6.2 Beams

7.7 Sizing

7.7.1 Introduction

7.7.2 Loading

7.7.3 Width of beams and ribs

7.7.4 Punching shear in flat slabs at columns

7.7.5 Adequacy of chosen sections to accommodate the tendons and reinforcement

7.7.5.1 Bending moments and shear forces

7.7.5.2 Provision of tendons and reinforcement

7.8 The next step

7.9 Reinforcement estimates

8 Final design – prestressed concrete

8.1 Introduction

8.2 Fire resistance and durability

8.2.1 Fire resistance

8.2.2 Durability

8.3 Flexural design

8.3.1 Tendon profile

8.3.2 Tendon force profile

8.3.2.1 Initial force (Pn,o)

8.3.2.2 Final force (Pn,oo)

8.3.3 Analysis of the structure

8.3.3.1 General

8.3.3.2 Beams and one-way solid slabs

8.3.3.3 Two-way solid slabs on linear supports

8.3.3.4 Flat slabs

8.3.3.5 Ribbed slabs

8.3.4 Serviceability limit state

8.3.4.1 Concrete stresses

8.3.4.2 Crack control

8.3.4.3 Transfer

8.3.5 Ultimate limit state

8.3.5.1 Bonded tendons

8.3.5.2 Unbonded tendons

8.3.5.3 Minimum reinforcement

8.3.6 Tendon spacing

8.4 Shear design

8.4.1 General

8.4.2 Standard method

8.4.3 Variable-strut inclination method

8.4.4 Shear in flat slabs

8.4.5 Detailing of shear reinforcement

8.4.5.1 Minimum reinforcement

8.4.5.2 Maximum spacing

8.4.5.3 Arrangement of links

8.4.5.4 Openings

8.5 Anchorage zones

8.5.1 General

8.5.2 Pretensioned members

8.5.3 Post-tensioned members

8.5.3.1 General

8.5.3.2 Bursting

8.5.3.3 Overall equilibrium

8.5.3.4 Spalling

8.5.4 Couplers

8.6 Tendon extensions

8.7 Robustness and detailing