Design of deep beams in reinforced concrete
Series/doc. No
Guide
Guide G 2
Year
1977
Abstract
The Guide provides simple rules for designing reinforced concrete beams of span/depth ratio below 2 for single spans or 2.5 for multiple spans. Supplementary rules deal with cases where load capacity of the beam may be affected by elastic instability, where loads are concentrated, or where holes in the beam may affect performance. The derivation of the rules is given. Appendices give typical stress distribution in deep beams, design examples, buckling strength, shear strength of top-loaded deep beams, and an estimate of deflections in deep beams.
ISBN
9780860170815
Subject(s)
Building structure
Building systems/frame
Concrete building systems/frame
Supplement
Civil & Structural. To subscribe to The Construction Information Service please telephone Customer Care on +44 1344 328300
Publisher History
CIRIA was formerly known as the Construction Industry Research and Information Association. They are a member-based research and information organisation who publish reports and technical papers covering building and civil engineering as well as transport and utilities infrastructure.
Table Of Contents
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Summary
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8
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1 Introduction
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9
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1.1 General
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9
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1.2 Design principles
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9
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1.3 Scope
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9
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1.4 Limitations
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9
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1.5 Multi-purpose deep beams
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9
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1.6 Geometry and behaviour of deep beams
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11
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1.7 Design rules - general considerations
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12
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2 Simple rules of the analysis of deep beams
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12
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2.1 General
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12
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2.2 Geometry
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13
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2.3 Computation of forces
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14
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2.4 Strength: ultimate limit state
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17
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2.5 Holes through deep beam
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23
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2.6 Serviceability limit state
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27
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3 Supplementary rules for the analysis of deep beams
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29
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3.1 General
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29
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3.2 Geometry
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29
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3.3 Computation of forces
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30
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3.4 Strength: ultimate limit state
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30
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3.5 Holes through deep beams
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38
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3.6 Serviceability limit state
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41
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4 Behaviour of deep beams: an explanation of the rules
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41
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4.1 Elastic analysis
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41
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4.2 Elastic instability
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43
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4.3 Ultimate load behaviour
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43
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4.4 Flexural failure
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43
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4.5 Shear failure
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44
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4.6 Shear capacity: top-loaded beams
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45
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4.7 Shear capacity: bottom and indirectly loaded and indirectly supported deep beams
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48
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4.8 Shear capacity: upper limits
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48
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4.9 Shear capacity: load combination
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49
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4.10 Bearing failure
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49
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4.11 Bursting tensions produced under concentrated loads
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50
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4.12 Holes
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51
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4.13 Deformation and deflection
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52
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4.14 Settlement of foundations
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52
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4.15 Reinforcement
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52
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5 References
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52
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Appendices
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55
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A. Typical stress distribution in deep beams
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55
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B. Examples of deep beam design
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75
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C. Buckling strength of deep beams
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109
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D. Shear strength of reinforced, top-loaded deep beams
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120
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E. Estimate of deflections in deep beams
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122
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List of illustrations
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128
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List of tables
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134
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Symbols, terms and units of measurement
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134
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