LONG-TERM TENSION-STIFFENING EFFECTS IN CONCRETE
For many types of construction, such as balanced cantilever, incremental launch, or even in-place on formwork, the time-dependent effects have to be included within the structural analysis by the designer, both in terms of stresses and deformations. This article reports on a study that investigated long-term tension-stiffening effects in beams and slabs by a comprehensive series of laboratory tests. Three load levels and three concrete strengths were used and loads were sustained for periods of up to 4 months. Some specimens contained strain-gauged reinforcing bars to obtain very detailed data concerning reinforcement strain distributions. The results indicated that tension-stiffening decayed much more rapidly than was previously thought, and that by 20 days, or sooner, after loading, it had reduced to its long-term value. The authors conclude by discussing the implications of their results on the current design rules for deflection control.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/13846957
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Supplemental Notes:
- For this issue of the ACI Structural Journal, the date is January/February 2005.
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Corporate Authors:
American Concrete Institute (ACI)
38800 Country Club Drive
Farmington Hills, MI United States 48331 -
Authors:
- Scott, R H
- Beeby, A W
- Publication Date: 2005-1
Language
- English
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 31-39
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Serial:
- ACI Structural Journal
- Volume: 102
- Issue Number: 1
- Publisher: American Concrete Institute (ACI)
- ISSN: 0889-3241
- Serial URL: http://www.concrete.org/PUBS/JOURNALS/SJHOME.ASP
Subject/Index Terms
- TRT Terms: Beams; Concrete; Deflection; Deflection tests; Design standards; Flexural strength; Load tests; Reinforcing bars; Slabs; Stiffness; Tension
- Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;
Filing Info
- Accession Number: 00985146
- Record Type: Publication
- Files: TRIS
- Created Date: Jan 31 2005 12:00AM