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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 56 Abstracts search results
Document:
SP138
Date:
September 1, 1993
Author(s):
Editors: Antonio Nanni and Charles W. Dolan / Sponsored by: ACI Committee 440 and Joint ACI-ASCE Committee 423
Publication:
Symposium Papers
Volume:
138
Abstract:
"The American Concrete Institute sponsored an unprecedented six technical sessions on FRP Reinforcement for Concrete at the Vancouver Conference on March 28-31, 1993. Speakers and attendees were present from Europe, Japan, Canada and the United States. The papers in this Special Publication are organized in the same subject areas as the conference. The subject topic areas and symposium sections are: 1. FRP Material Properties and Testing Methods 2. FRP Reinforcement for Reinforced Concrete 3. FRP Reinforcement for Prestressed Concrete 4. Analysis And Design 5. The Japanese National Project for FRP Development 6. Applications of FRP Reinforcement The 55 technical papers in this report represent the most comprehensive compilation to date of FRP research, design, and application information. A comparison of the papers provides an insight to the approach to the use and development of FRP reinforcement within the research communities of Europe, Japan and North America. The two symposium volumes are also significant because substantial portions of the extensive Japanese national research project have been translated into English. The Japanese papers provide an insight to both the magnitude of the technical work being conducted in Japan and the organization of the Japanese research program." Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP138
DOI:
10.14359/14178
SP138-01
W. Reinold De Sitter and rene A. Vonk
In concrete pretensioned with nonmetallic fiber reinforced plastic reinforcement (FRPR), the Hoyer effect leads to high splitting stresses due to confinement of radial deformations of bars or strands in the transfer zone. Incompatible linear temperature expansion can aggravate the splitting stresses. Bond in the transfer zone is heavily influenced by the confined radial expansion, as demonstrated by tests with bars in lightweight concrete. Very short transfer lengths (80 mm) have been measured. Three calculation approaches for splitting stresses are presented: the elasto-plastic, concrete deformation, and fracture energy approaches. The elasto-plastic model has been checked using a discrete element model that includes tensile softening of concrete. The presented formulas are confirmed by several tests on pretensioned prisms.
10.14359/3918
SP138-02
Rajan Sen, Daniel Mariscal, and Mohsen Shahawy
A comprehensive durability study of S-2 glass-epoxy pretensioned beams exposed to wet-dry cycles in 15 percent salt solution indicated a complete loss of effectiveness within 3 to 9 months of exposure. Paper presents results of subsequent follow-up investigations to identify the cause of this deterioration and also to examine practical measures that could be used to prevent its occurrence. The analysis of the test results suggests that the most likely cause of failure was diffusion of hydroxyl ions from the concrete pore solution through the resin. This is supported by SEM micrographs of the failed beam. While these conclusions are valid only for the S-2 resin, diffusion is also likely to be a characteristic of other types of resins, e.g., vinylesters and polyesters. This makes long-term protection of glass fibers in concrete problematic.
10.14359/3857
SP138-03
K. Mukae, S. Kumagai, H. Nakai, and H. Asai
Bond characteristics of FRP rod and concrete after freezing and thawing deterioration
10.14359/3858
SP138-07
Taketo Uomoto and Hosam Hosam Hodsam
The mechanical behavior and tensile strength of three kinds of FRP rods were investigated experimentally. For each material, three different fiber volume fractions were tested in axial tension. The stress-strain relationships and strength distributions were obtained. The results were correlated to the behavior and strength of the basic strengthening elements, fibers, as determined experimentally. This yielded the possibility of predicting rod modulus, but not strength, from those fibers. The strength distributions showed a shift that is not generally proportional to rod fiber content. Investigation of this phenomenon, through stress analysis at the grips and inspection of failed rods, assured the change of rod failure modes for different fiber contents. The effect of grips could lead to one of two shear failure modes instead of tension mode. Therefore, an apparent strength reduction was observed. In view of rod properties, appropriate design of the gripping system is needed to obtain the best performance of the rods.
10.14359/3859
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