421.3R-15 Guide to Design of Reinforced Two-Way Slab Systems

421.3R-15 Guide to Design of Reinforced Two-Way Slab Systems

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Description

This guide presents analysis methods, design procedures, slab reinforcement and detailing practices, and strength and serviceability considerations, as well as information for the resistance to lateral forces for slab-column frames. It also covers the design for flexure and shear and torsion, as well as the effect of openings. Both two-way nonprestressed slabs and post-tensioned slabs are included.

Keywords: analysis method; deflection; direct design; flat plates; flat slabs; post-tension; reinforcement; shear; shearhead; slab-column frame; two-way slabs.

 

Document Details

Author: ACI Committee 421 - (Joint ACI-ASCE)

Publication Year: 2015

Pages: 28.00

ISBN: 9781942727569

Categories: Shear

Formats: PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION AND SCOPE

1.1—Introduction: history of two-way slab system

1.2—Scope

CHAPTER 2—NOTATION AND DEFINITIONS

2.1—Notation

2.2—Definitions

CHAPTER 3—ANALYSIS METHODS

3.1—General

3.2—Analysis methods

3.3—Finite element analysis

3.4—Yield-line theory

3.5—Strip method analysis

CHAPTER 4—DESIGN PROCEDURES

4.1—General

4.2—Gravity loading

4.3—Flexural design

4.4—Two-way action slab shear

4.5—Critical section

4.6—Openings in slab systems

4.7—Unbalanced moments

4.8—Shear strength

4.9—Post-tensioned slabs

CHAPTER 5—SLAB REINFORCEMENT AND DETAILING

5.1—General

5.2—Slabs without beams

5.3—Corner reinforcement

5.4—Slab with drop panel

5.5—Column strip reinforcement

5.6—Middle strip reinforcement

5.7—Bent bars

5.8—Slab shear reinforcement

5.9—Post-tensioned slabs

5.10—Bonded reinforcement in post-tensioned slabs

CHAPTER 6—SERVICEABILITY CONSIDERATION

6.1—Minimum slab thickness

6.2—Deflection analysis

6.3—Crack control in reinforced two-way action structural slabs and plates

CHAPTER 7—DESIGN OF SLAB-COLUMN FRAMES UNDER LATERAL FORCES

7.1—General

7.2—Analysis of slab-column frames under lateral forces

7.3—Arrangement of reinforcement in slabs for intermediate moment frames

7.4—Slab-column frames not designated as part of the seismic-force-resisting system

7.5—Transfer of moments to column

CHAPTER 8—REFERENCES

Authored documents

APPENDIX A—EXCERPT BUILDING CODE PROVISIONS

A.1—Direct design method (ACI 318-14, Section 8.10)

A.2—Equivalent frame method (ACI 318-14, Section 8.11)

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