423.3R-17: Recommendations for Concrete Members Prestressed with Single-Strand Unbonded Tendons

423.3R-17: Recommendations for Concrete Members Prestressed with Single-Strand Unbonded Tendons

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Description

This report provides information for the design of flexural concrete members in buildings post-tensioned with single-strand unbonded tendons. The report is intended to complement the commentary in ACI 318 and to provide suggestions for revisions and additions to ACI 318. Consideration is given to design for gravity and lateral loads, determination of fire endurance, design for seismic forces, and design for catastrophic loadings. Recommendations concerning details and properties of tendons, protection against corrosion, and construction procedures are presented.

Keywords: concrete slabs; cracking; fire resistance; joints; punching shear; unbonded post-tensioning

Document Details

Author: ACI Committee 423

Publication Year: 2017

Pages: 24.00

ISBN: 9781945487705

Categories: Prestressed Concrete

Formats: Printed Document, PDF, ePub, or Kindle

Table of Contents

CHAPTER 1—INTRODUCTION

1.1—General

1.2—Objective

1.3—Scope

CHAPTER 2—NOTATION AND DEFINITIONS

2.1—Notation

2.2—Definitions

CHAPTER 3—MEMBER DESIGN

3.1—General

3.2—One-way systems

3.3—Two-way systems

3.4—Beams

3.5—Effects of supporting walls and columns on prestress forces

CHAPTER 4—ANCHORAGE ZONES

4.1—Anchorage zone reinforcement

CHAPTER 5—SEISMIC DESIGN

5.1—Earthquake loading

CHAPTER 6—DESIGN CONSIDERATIONS

6.1—General

6.2—Design strength

6.3—Tendon stress at factored load

6.4—Prestress losses

6.5—Average prestress

6.6—Serviceability requirements

6.7—Continuous members

6.8—Corrosion protection

6.9—Fire resistance

CHAPTER 7—MATERIALS

7.1—Tendons

7.2—Protection materials

7.3—Protection of anchorage zones

7.4—Concrete cover

CHAPTER 8—CONSTRUCTION

8.1—Construction joints

8.2—Closure strips

8.3—Placement of tendons

8.4—Concrete placement and curing

8.5—Stressing operations

8.6—Form removal and reshoring

8.7—Welding and burning

8.8—Protection of tendons

CHAPTER 9—REFERENCES

Authored documents

ERRATA INFO

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