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
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
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