Contenido Reinforced Concrete with FRP Bars.Mechanics and Design

Corrosion-resistant, electromagnetic transparent and lightweight fiber-reinforced polymers (FRPs) are accepted as valid alternatives to steel in concrete reinforcement. Reinforced Concrete with FRP Bars: Mechanics and Design, a technical guide based on the authors’ more than 30 years of collective experience, provides principles, algorithms, and practical examples.

Well-illustrated with case studies on flexural and column-type members, the book covers internal, non-prestressed FRP reinforcement. It assumes some familiarity with reinforced concrete, and excludes prestressing and near-surface mounted reinforcement applications. The text discusses FRP materials properties, and addresses testing and quality control, durability, and serviceability. It provides a historical overview, and emphasizes the ACI technical literature along with other research worldwide.

    Includes an explanation of the key physical mechanical properties of FRP bars and their production methods
    Provides algorithms that govern design and detailing, including a new formulation for the use of FRP bars in columns
    Offers a justification for the development of strength reduction factors based on reliability considerations
    Uses a two –story building solved in Mathcad® that can become a template for real projects

This book is mainly intended for practitioners and focuses on the fundamentals of performance and design of concrete members with FRP reinforcement and reinforcement detailing. Graduate students and researchers can use it as a valuable resource.

Antonio Nanni is a professor at the University of Miami and the University of Naples Federico II. Antonio De Luca and Hany Zadeh are consultant design engineers.



PART I

Materials and test methods

Introduction

Background

FRP reinforcement

FRP reinforced concrete

Acceptance by building officials

Applications

References

Material properties

Introduction

FRP bar

Constituent materials: Fibers and resin matrices

Manufacturing by pultrusion

References

FRP bar properties

Physical and mechanical properties of FRP bars

Test methods

Product certification and quality assurance

Performance of FRP RC under fire conditions

References

PART II

Analysis and design

Flexural members

Notation

Introduction

Structural analysis

Initial member proportioning

FRP design properties

Bending moment capacity

Strength-reduction factors for flexure

Anchorage and development length

Special considerations

Serviceability

Shear capacity

Temperature and shrinkage reinforcement

Safety fire checks for bending moment capacity

References

Members subjected to combined axial load and bending moment

Notation

Introduction

FRP bars as compression reinforcement

Overall design limitations for FRP RC columns

Reinforced concrete columns subjected to axial load

Design recommendations for FRP RC columns

Bending moment and axial force

Strength-reduction factor for combined bending moment and axial force

Columns subjected to axial load and biaxial bending

Shear strength, Vn

References

PART III

Design examples

Design of a one-way slab

Introduction

Design summary

Step 1—Define slab geometry and concrete properties

Step 2—Compute the factored loads

Step 3—Compute bending moments and shear forces

Step 4—Design FRP primary reinforcement

Step 5—Check creep-rupture stress

Step 6—Check crack width

Step 7—Check maximum midspan deflection

Step 8—Check shear capacity

Step 9—Design the FRP reinforcement for shrinkage and temperature

Step 10—Fire safety check for flexural strength per Nigro et al

References

Design of a T-beam

Introduction

Design summary

Step 1—Define beam geometry and concrete properties

Step 2 —Compute factored loads

Step 3 —Compute bending moments and shear forces

Step 4—Design FRP primary reinforcement for bending moment capacity

Step 5—Check creep-rupture stress

Step 6 —Check crack width

Step 7—Check maximum midspan deflection

Step 8—Design FRP reinforcement for shear capacity

Step 9—Compute FRP contribution to torsional strength

References

Design of a two-way slab

Introduction

Design summary

Step 1—Define slab geometry and concrete properties

Step 2—Compute the factored loads

Step 3—Compute bending moments and shear forces

Step 4—Design FRP reinforcement for bending moment capacity

Step 5—Check creep-rupture stress

Step 6—Check crack width

Step 7—Check deflections

Step 8—Check for punching shear (no perimeter beams)

Reference

Design of a column

Introduction

Design summary

Step 1—Define column geometry and concrete properties

Step 2—Compute ultimate loads

Step 3—Design longitudinal FRP reinforcement

Step 4—Design FRP shear reinforcement

Step 5—Check creep-rupture stress

Design of square footing for a single column

Introduction

Design summary

Step 1—Define concrete properties

Step 2—Compute service axial loads and bending moments

Step 3—Preliminary analysis

Step 4—Design FRP reinforcement for bending moment capacity

Step 5—Check creep-rupture stress

Step 6—Check crack width

Step 7—Recheck shear strength

Reference

Index