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.
Table of Contents
1.4—Notations and definitions
Chapter 2—Design considerations
3.4—Tendon stress at factored load
3.7—Supporting walls and columns
3.10—Anchorage zone reinforcement
4.3—Protection of anchorage zones
5.3—Placement of tendons
5.4—Concrete placement and curing
5.6—Form removal and reshoring
5.7—Welding and burning
5.8—Protection of tendons
6.1—Referenced standards and reports
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