421.1R-08 - Guide to Shear Reinforcement for Slabs

421.1R-08 - Guide to Shear Reinforcement for Slabs

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Description

Tests have established that punching shear in slabs can be effectively resisted by reinforcement consisting of vertical rods mechanically anchored at the top and bottom of slabs. ACI 318 sets out the principles of design for slab shear reinforcement and makes specific reference to stirrups, headed studs, and shearheads. This guide reviews other available types and makes recommendations for their design. The application of these recommendations is illustrated through numerical examples.

Keywords: column-slab connection; concrete flat plate; headed shear studs; moment transfer; prestressed concrete; punching shear; shear stresses; shearheads; slabs; two-way slabs.

 

Document Details

Author: ACI Committee 421

Publication Year: 2008

Pages: 15.00

ISBN: 9780870312809

Categories: Shear

Formats: Printed Document or PDF

Table of Contents

Chapter 1—Introduction and scope

1.1—Introduction

1.2—Scope

1.3—Evolution of practice

Chapter 2—Notation and definitions

2.1—Notation

2.2—Definitions

Chapter 3—Role of shear reinforcement

Chapter 4—Punching shear design equations

4.1—Strength requirement

4.2—Calculation of factored shear stress vu

4.3—Calculation of shear strength vn

4.4—Design procedure

Chapter 5—Prestressed slabs

5.1—Nominal shear strength

Chapter 6—Tolerances

Chapter 7—Requirements for seismic-resistant slab-column connections

Chapter 8—References

8.1—Referenced standards and reports

8.2—Cited references

Appendix A—Details of shear studs

A.1—Geometry of stud shear reinforcement

A.2—Stud arrangements

A.3—Stud length

Appendix B—Properties of critical sections of general shape

Appendix C—Values of vc within shear-reinforced zone

Appendix D—Design examples

D.1—Interior column-slab connection

D.2—Edge column-slab connection

D.3—Corner column-slab connection

D.4—Prestressed slab-column connection

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