TENSILE BEHAVIOR OF CONCRETE
Under tensile stress, concrete fails at low average strain but a high local strain due to nonuniform strain distribution. It is demonstrated that the use of optical interferometry with laser light both provides adequate sensitivity and allows measurement of strain over a wide field. The measurement is continuous and capable of detecting the localization of strain in zones of very small width. It is shown also that while the use of strain gages would lead to unobjective constitutive stress-strain relations, interferometric measurement on notched specimens allows an indirect determination of the local stress-strain and stress-separation relations. From the knowledge of these and of the strain path in the fracture zone, the value of the fracture energy of concrete can be calculated. It is shown that the energy dissipated in the microcracked zone is a small fraction of the energy dissipated in the final separation of concrete.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/07339399
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Corporate Authors:
American Society of Civil Engineers
345 East 47th Street
New York, NY United States 10017-2398 -
Authors:
- Cedolin, L
- Poli, S D
- Iori, I
- Publication Date: 1987-3
Media Info
- Features: Appendices; Figures; References; Tables;
- Pagination: p. 431-449
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Serial:
- Journal of Engineering Mechanics
- Volume: 113
- Issue Number: 3
- Publisher: American Society of Civil Engineers
- ISSN: 0733-9399
- EISSN: 1943-7889
- Serial URL: http://ascelibrary.org/journal/jenmdt
Subject/Index Terms
- TRT Terms: Concrete; Cracking; Deformation curve; Fracture mechanics; Lasers; Tension
- Uncontrolled Terms: Crack propagation; Fracture energy; Tensile stress
- Old TRIS Terms: Indirect method; Laser applications; Optical interferometry
- Subject Areas: Highways; Materials; I32: Concrete;
Filing Info
- Accession Number: 00472563
- Record Type: Publication
- Report/Paper Numbers: Paper No. 21363
- Files: TRIS
- Created Date: Aug 31 1987 12:00AM