Design of Reinforced Concrete Structure – Volume 1 – DR. Mashhour A. Ghoneim (KEBT0029)

Design of Reinforced Concrete Structure – Volume 1 – DR. Mashhour A. Ghoneim

TABLE OF CONTENTS

1. REINFORCED CONCRETE FUNDAMENTALS

1.1       Introduction

1.2       Reinforced Concrete Members

1.3       Reinforced Concrete

1.4       Reinforced Concrete Behavior

1.5.      Mechanical Properties of Concrete

1.5.1    Compressive Strength

1.5.2    Tensile strength

1.5.3    Modulus of Elasticity

1.5.4    Strength of Concrete Under Biaxial Loading

1.5.5    Shrinkage

1.5.6    Creep

1.6       Reinforcing Steel

1.7       Limit States Design Method

1.8       Strength Reduction Factors

1.9       Classification of Loads

1.10     Load Combinations

2. DESIGN OF SINGLY REINFORCED SECTIONS

2.1       Introduction

2.2       Reinforced Concrete Beam Behavior

2.3       Flexure Theory of Reinforced Concrete

2.3.1    Basic Assumptions of the Flexure Theory

2.3.2    Stress-Strain Relationships

2.3.2.1 Concrete in Compression

2.3.2.2 Reinforcing Steel

2.3.3    The Equivalent Rectangular Stress Block

2.4       Analysis of Singly Reinforced Sections

2.5       Maximum Area of Steel of a Singly Reinforced Section

2.6       Balanced, Under, and Over Reinforced Sections

2.7       Minimum Area of Steel

2.9       Design of Singly Reinforced Sections by First Principles

2.10     Design of Singly Reinforced Sections Using Curves

2.10.1  Design Charts (R-|1)

2.10.2  Design Chart (R- co)

3. DOUBLY REINFORCED BEAMS AND T-BEAMS

3.1       Doubly Reinforced Sections

3.1.1    Introduction

3.1.2    Analysis of Doubly Reinforced Sections

3.1.3    Maximum Area of Steel for Doubly Reinforced Sections

3.1.4    Design of Doubly Reinforced Sections Using First Principles

3.1.5    Design of Doubly Reinforced Sections Using Curves

3.2       T-Beams

3.2.1    Application of T-Beams

3.2.2    Effective Flange Width

3.2.3    Analysis of T-Beams,

3.2.4    Minimum Area of Steel for T-sections

3.2.7    Design of T-sections Using Curves

3.2.7.1 Development of the Curves

3.2.7.2 Using the Design Aids (charts Cl-J and RT-J)

3.3       Design of L-Sections

4. SHEAR IN R/C BEAMS

4.1       Introduction

4.2       Shear stresses in Elastic Beams

4.3       Shear Stresses in Cracked R/C Beams

4.4       Behavior of Slender Beams Failing in Shear

4.4.1    Inclined Cracking

4.4.2    Internal Forces in Beams without stirrups

4.4.3    Behavior of Slender Beams with Stirrups

4.5       Egyptian Code’s Procedure for Shear Design

4.5.1    Critical Sections for Shear

4.5.2    Upper limit of Design Shear Stress

4.5.3    Shear Strength Provided by Concreten

4.5.4    Shear Strength Provided by Shear Reinforcement

4.5.5    Code Requirements for Shear Reinforcement

5          BOND, DEVELOPMENT LENGTH AND SPLICING OF REINFORCEMENT

5.1       Introduction

5.2       Average Bond Stresses in a Beam

5.3       True Bond Stresses in a Beam

5.4       Development Length

5.4.1    Theoretical Considerations

5.4.2    Development Length According to ECP 203

5.5       Bar Cutoffs in Flexural Members

5.5.1    The Moment of Resistance of a R/C Beam

5.5.2    Curtailment of Bars in Beams

5.5.3    Egyptian Code’s Requirements for Curtailment

5.6       Beams with Bent-up Bars

5.7       Anchorage of Web Reinforcement

5.8       Splicing of Reinforcement

5.8.1    Lap splices

5.8.2    Welded and Mechanical Connections

6          REINFORCED CONCRETE BEAMS

6.1       Introduction

6.1       Statical Systems of R/C Beams

6.2       The effective span

6.3       Loads Acting on Beams

6.3.1    Own weight of beams

6.3.2    Slab loads

6.3.3    Wall loads

6.4       Slenderness limits for beams

6.5       Linear Elastic Analysis of Continuous Beams

6.6       Reinforcement Detailing in R/C Beams

6.6.2    Bar Spacing

6.6.3    Egyptian Code Recommendations

7          TRUSS MODEL FOR BEAMS FAILING IN SHEAR

7.1       Introduction

7.2       Background

7.2.1    Slender Beams Versus Deep Beams

7.2.2    Analysis of Forces in R/C Slender Beams

7.2.2.1 Sectional Analysis

7.2.2.2 Mechanical – Mathematical Models

7.3       Truss Model for Slender Beams

7.4       Traditional 45-Degree Truss Model

7.4.1    Formation of the 45-Degree Truss

7.4.2    Evaluation of the Forces in the Stirrups

7.4.3    The Compression Force in the Diagonals

7.4.4    The Axial (Longitudinal) Force Due to Shear

7.4.5    Comments on the 45-Degree Truss-Model

7.4.6    Comparison of the Truss Model and ECP 203

7.6       The Variable-Angle Truss Model

7.6.1    General

7.6.2    Analysis of the Variable Angle Truss Model

8          DESIGN FOR TORSION

8.1       Introduction

8.2       Equilibrium Torsion and Compatibility Torsion

8.2.1    General

8.2.2    Equilibrium Torsion

8.2.3    Compatibility Torsion

8.3       Principal Stresses due to Torsion

8.4       Thin-Walled Tube in Torsion

8.5       Space-Truss Model for Torsion

8.5.1    Components of the Space Truss

8.5.2    Diagonal Compressive Stresses

8.5.3    Forces in Stirrups

8.5.4    Longitudinal Force

8.6       The Design for Torsion in the Egyptian Code

8.6.1    General

8.6.2    Calculation of the Shear Stress due to Torsion

8.6.3    Consideration of Torsion

8.6.4    Adequacy of the Concrete Cross-Section

8.6.5    Design of Torsional Reinforcement

8.6.5.1 Closed Stirrups

8.6.5.2 Longitudinal Reinforcement

8.6.6    Code Requirements for Reinforcement Arrangement.

8.6.7    Summary of Torsion Design According to ECP 203

8.7       Combined Shear and Torsion

8.8       The Design for Shear and Torsion in ECP 2Ọ3

8.8.1    Consideration of Torsion

8.8.2    Adequacy of the Concrete Cross-Section

8.8.3    Design of Transverse Reinforcement

8.8.4    Design of Longitudinal Reinforcement

8.8.5    Summary of the Design for Shear and Torsion

8.9       Compatibility Torsion

8.10     Torsional Rigidity

APPENDIX A: DESIGN AIDS

REFERENCES