Relaxation Characteristics of Prestressing Strand

Buckler, J.D.; Scribner, C.F.

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https://hdl.handle.net/2142/14128 Copy

Description

Title

Relaxation Characteristics of Prestressing Strand

Author(s)

• Buckler, J.D.
• Scribner, C.F.

Issue Date

1985-08

Keyword(s)

• Prestressed concrete
• Steel -- Relaxation

Date of Ingest

2009-10-30T17:19:41Z

Abstract

Relaxation characteristics of seven-wire prestressing strand were studied in this experimental investigation. Tests were conducted on both stress-relieved strand and low-relaxation strand. Two series of tests were carried out on both types of strand.. First, strand specimens were tested under conditions of constant strain. Second 3 stress in the strand specimens was reduced at a time of 24 hours after the initial tensioning3 then held at the strain accompanying their reduced stress for the remainder of the test. A quadratic equation was developed to predict losses of stress due to relaxation. The effects of stress reduction were accounted for by the use of a load reduction variable included in the quadratic equation.

Publisher

University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Civil Engineering Studies SRS-520

Type of Resource

text

Genre of Resource

Technical Report

Language

en

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http://hdl.handle.net/2142/14128

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