Stress relaxation losses of prestressing steel wires

Suárez Guerra, Fernando and Gálvez Ruiz, Jaime (2011). Stress relaxation losses of prestressing steel wires. "CPI - Concrete Plant International" (n. 1); pp. 26-31. ISSN 1439-7706.

Description

Title: Stress relaxation losses of prestressing steel wires
Author/s:
  • Suárez Guerra, Fernando
  • Gálvez Ruiz, Jaime
Item Type: Article
Título de Revista/Publicación: CPI - Concrete Plant International
Date: 2011
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ingeniería Civil: Construcción
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Prestressed structures are susceptible to relaxation losses which are of significant importance in structural design. After being manufactured, prestressing wires are coiled to make their storage and transportation easier. The possible deleterious effects of this operation on the stress relaxation behavior of prestressing steel wires are usually neglected, though it has been noticed by manufacturers and contractors that when relaxation tests are carried out after a long-time storage, on occasions relaxation losses are higher than those measured a short time after manufacturing. The influence of coiling on the relaxation losses is checked by means of experimental work and confirmed with a simple analytical model. The results show that some factors like initial residual stresses, excessively long-time storage or storage at high temperatures, can trigger or accentuate this damage. However, it is also shown that if the requirements of standards are fulfilled (minimum coiling diameters) these effects can be neglected.

More information

Item ID: 11457
DC Identifier: http://oa.upm.es/11457/
OAI Identifier: oai:oa.upm.es:11457
Official URL: http://www.cpi-worldwide.com/us/node/20659
Deposited by: Memoria Investigacion
Deposited on: 21 Sep 2012 05:43
Last Modified: 31 May 2018 13:13
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