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ACI 423.3R 05 2005

ACI 423.3R 05 2005

$35.48

423.3R-05: Recommendations for Concrete Members Prestressed with Unbonded Tendons

Published By Publication Date Number of Pages
ACI 2005 21
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This report is a guide for the design of flexural concrete members in buildings post-tensioned with unbonded tendons. Suggestions for revisions and additions to ACI 318 regarding this subject are presented. Consideration is given to determination of fire endurance, design for seismic forces, and design for catastrophic loadings, in addition to design for gravity and lateral loads. Recommendations concerning details and properties of tendons, protection against corrosion, and construction procedures are presented. Keywords: anchorage (structural); beams (supports); bond (concrete to reinforcement); concrete construction; concrete slabs; cover; cracking (fracturing); earthquake-resistant structures; fire resistance; flat concrete plates; flat concrete slabs; joints (junctions); loads (forces); post-tensioning; prestressed concrete; prestressing; prestressing steels; shear properties; stresses; structural analysis; structural design; unbonded prestressing.

PDF Catalog

PDF Pages PDF Title
1 CONTENTS
CONTENTS
2 CHAPTER 1— INTRODUCTION
CHAPTER 1— INTRODUCTION
1.1— General
1.1— General
1.2—Objective
1.2—Objective
1.3—Scope
1.3—Scope
1.4—Notations and definitions
1.4—Notations and definitions
CHAPTER 2— DESIGN CONSIDERATIONS
CHAPTER 2— DESIGN CONSIDERATIONS
2.1— General
2.1— General
2.2—Continuous members
2.2—Continuous members
2.2.1 One-way members
2.2.1 One-way members
3 2.2.2 Two-way members
2.2.2 Two-way members
2.3—Corrosion protection
2.3—Corrosion protection
2.4—Fire resistance
2.4—Fire resistance
2.4.1 Minimum dimensions for various fire resistive classifications (PTI 1990)
2.4.1 Minimum dimensions for various fire resistive classifications (PTI 1990)
2.4.1.1 Slabs
2.4.1.1 Slabs
4 2.4.1.2 Beams
2.4.1.2 Beams
2.4.1.3 Anchorage protection
2.4.1.3 Anchorage protection
2.4.2 Rational design for fire endurance
2.4.2 Rational design for fire endurance
5 2.5—Earthquake loading
2.5—Earthquake loading
2.5.1 Code requirements
2.5.1 Code requirements
2.5.2 Behaviors
2.5.2 Behaviors
6 CHAPTER 3— DESIGN
CHAPTER 3— DESIGN
3.1— General
3.1— General
7 3.2—One-way systems
3.2—One-way systems
3.2.1 Minimum bonded reinforcement
3.2.1 Minimum bonded reinforcement
3.2.2 Tendon spacing
3.2.2 Tendon spacing
8 3.2.3 Minimum stirrups
3.2.3 Minimum stirrups
3.2.4 Prestressed shrinkage and temperature reinforcement
3.2.4 Prestressed shrinkage and temperature reinforcement
3.2.5 T-beam flange width
3.2.5 T-beam flange width
3.3—Two-way systems
3.3—Two-way systems
3.3.1 Analysis
3.3.1 Analysis
9 3.3.2 Limits for reinforcement
3.3.2 Limits for reinforcement
3.3.3 Minimum bonded reinforcement
3.3.3 Minimum bonded reinforcement
10 3.3.4 Shear and moment transfer
3.3.4 Shear and moment transfer
11 3.3.5 Tendon and bonded reinforcement distribution and spacing
3.3.5 Tendon and bonded reinforcement distribution and spacing
3.3.5.1 Recommended details of reinforcement for banded tendon distribution
3.3.5.1 Recommended details of reinforcement for banded tendon distribution
12 3.4—Tendon stress at factored load
3.4—Tendon stress at factored load
3.5—Prestress losses
3.5—Prestress losses
13 3.6—Average prestress
3.6—Average prestress
3.6.1 Minimum average prestress
3.6.1 Minimum average prestress
3.6.2 Maximum average prestress
3.6.2 Maximum average prestress
3.7—Supporting walls and columns
3.7—Supporting walls and columns
14 3.8—Serviceability requirements
3.8—Serviceability requirements
3.9—Design strength
3.9—Design strength
3.10—Anchorage zone reinforcement
3.10—Anchorage zone reinforcement
15 CHAPTER 4— MATERIALS
CHAPTER 4— MATERIALS
4.1—Tendons
4.1—Tendons
4.1.1 Specifications (ACI 423.6R-01)
4.1.1 Specifications (ACI 423.6R-01)
4.1.2 Anchorages (ACI 423.6R-01)
4.1.2 Anchorages (ACI 423.6R-01)
4.1.3 Tests of tendons and anchor fittings
4.1.3 Tests of tendons and anchor fittings
4.1.3.1 Static tests (ACI 423.6R-01)
4.1.3.1 Static tests (ACI 423.6R-01)
4.1.3.2 Fatigue tests (ACI 423.6R-01)
4.1.3.2 Fatigue tests (ACI 423.6R-01)
16 4.1.4 Couplers (ACI 423.6R-01)
4.1.4 Couplers (ACI 423.6R-01)
4.2—Protection materials
4.2—Protection materials
4.2.1 Post-tensioning coating
4.2.1 Post-tensioning coating
4.2.2 Sheathing
4.2.2 Sheathing
4.3—Protection of anchorage zones
4.3—Protection of anchorage zones
4.4—Concrete cover
4.4—Concrete cover
CHAPTER 5— CONSTRUCTION
CHAPTER 5— CONSTRUCTION
5.1— Construction joints
5.1— Construction joints
5.2—Closure strips
5.2—Closure strips
5.3—Placement of tendons
5.3—Placement of tendons
5.3.1 Tendon profile
5.3.1 Tendon profile
5.3.2 Tolerances
5.3.2 Tolerances
17 5.3.3 Openings
5.3.3 Openings
5.4—Concrete placement and curing
5.4—Concrete placement and curing
5.5—Stressing operations
5.5—Stressing operations
18 5.6—Form removal and reshoring
5.6—Form removal and reshoring
5.7—Welding and burning
5.7—Welding and burning
5.8—Protection of tendons
5.8—Protection of tendons
CHAPTER 6— REFERENCES
CHAPTER 6— REFERENCES
6.1— Reference standards and reports
6.1— Reference standards and reports
19 6.2—Cited references
6.2—Cited references

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ACI 423.3R 05 2005
$35.48