Reinforcedconcrete

designFIFTH EDITION

W. H. MOSLEYFORMERLY NANYANG TECHNOLOGICAL UNIVERSITY, SINGAPORE

AND DEPARTMENT OF CIVIL ENGINEERING

UNIVERSITY OF LIVERPOOL

j . H . BUNGEYDEPARTMENT OF CIVIL ENGINEERING

UNIVERSITY OF LIVERPOOL

R. HULSESCHOOL OF THE BUILT ENVIRONMENT

COVENTRY UNIVERSITY

Contents

Preface to fifth edition page viii

Notation ix

1 Properties of reinforced concrete i1.1 Composite action 2

1.2 Stress-strain relations 3

1.3 Shrinkage and thermal movement 6

1.4 Creep 10

1.5 Durability 11

1.6 Specification of materials 11

2 Limit state design 142.1 Limit states 15

2.2 Characteristic material strengths and characteristic loads 16

2.3 Partial factors of safety 17

2.4 Global factor of safety 19

3 Analysis of the structure 233.1 Loads 24

3.2 Load combinations 25

3.3 Analysis of beams 26

3.4 Analysis of frames 33

3.5 Shear wall structures resisting horizontal loads 43

3.6 Redistribution of moments 48

4 Analysis of the section 534.1 Stress-strain relations 54

4.2 The distribution of strains and stresses across a section 55

4.3 Bending and the equivalent rectangular stress block 57

4.4 Singly reinforced rectangular section in bending 58

4.5 Rectangular section with compression reinforcement at the

ultimate limit state 62

4.6 Flanged section in bending at the ultimate limit state 66

4.7 Moment redistribution and the design equations 73

4.8 Bending plus axial load at the ultimate limit state 77

4.9 The rectangular-parabolic stress block 84

4.10 The triangular stress block , 87

vi ! I Contents

5 Shear, bond and torsion5.1 Shear5.2 Anchorage bond5.3 Laps in reinforcement5.4 Analysis of section subject to torsional moments

6 Serviceability, durability and stability requirements6.1 Detailing requirements6.2 Span-effective depth ratios6.3 Calculation of deflections6.4 Flexural cracking6.5 Thermal and shrinkage cracking6.6 Other serviceability requirements6.7 Stability

7 Design of reinforced concrete beams7.1 Preliminary analysis and member sizing7.2 Design for bending7.3 Design for shear7.4 Bar spacing7.5 Continuous beams7.6 Cantilever beams and corbels7.7 Design for torsion

8 Design of reinforced concrete slabs8.1 Simplified analysis8.2 Shear in slabs8.3 Span-effective depth ratios8.4 Reinforcement details8.5 Solid slabs spanning in one direction8.6 Solid slabs spanning in two directions8.7 Flat slab floors8.8 Ribbed, waffle and hollow block floors8.9 Stair slabs8.10 Yield line and strip methods

9 Column design9.1 Loading and moments9.2 Column classification and failure modes9.3 Reinforcement details9.4 Design of short columns9.5 Non-rectangular sections9.6 Biaxial bending of short columns9.7 Design of slender columns9.8 Walls

Contents ! ! vii

Foundations10.110.210.310.410.510.610.7

Pad footingsCombined footingsStrap footingsStrip footingsRaft foundationsPiled foundationsDesign of pile caps

10 Foundations 248250256259261264265268

11 Water-retaining structures and retaining walls 27411.1 Water-retaining structures 27511.2 joints in water-retaining structures 27711.3 Reinforcement details 28011.4 Design methods 28211.5 Retaining walls 294

12 Prestressed concrete 30512.1 Principle of prestressing 30712.2 Methods of prestressing 30812.3 Analysis of concrete section under working loads 31012.4 Design for the serviceability limit state 31512.5 Analysis and design at the ultimate limit state 338

13 Composite construction 35013.1 The design procedure 35313.2 Design of the steel beam for conditions during construction 35413.3 The composite section at the ultimate limit state 35613.4 Design of shear connectors 36113.5 Transverse reinforcement 36413.6 The composite section at the serviceability limit state 367

Appendix 374

Further reading 380

Index 382