ACI Global Home Middle East Region Portal Western Europe Region Portal
Email Address is required Invalid Email Address
In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Learn More
Become an ACI Member
Topics In Concrete
Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 20 Abstracts search results
Document:
SP81
Date:
November 1, 1984
Author(s):
Editor: George C. Hoff
Publication:
Symposium Papers
Volume:
81
Abstract:
SP81 The nineteen papers in this volume are divided into three parts. Part I deals with structural application and design and previous information on the use of fiber reinforced concrete in structural elements. Part II deals with applications, materials, and techniques for evaluating fiber reinforced concrete. Part III consists of committee reports on: A) state-of-the-art report on fiber reinforced concrete; B) measurement of properties of fiber reinforced concrete; C) guide for specifying, mixing, placing, and finishing steel fiber reinforced concrete.
DOI:
10.14359/14038
SP81-01
Roop L. Jindal
Tests were made on 44 beams to study the effect of steel fibers as shear reinforcement and to determine if there was any increase in the shear/moment capacity and change in the mode of failure. Span length of 30 in. (762 mm) was used for shear-span ratios (a/d) of 2.0 and 2.4, and 60 in. (1524 mm) for a/d ratios of 3.6 and 4.8. Steel fibers of 1% by volume were used in all SFRC beams. The variables were type of fibers, aspect ratio (l/d) of the fibers and the shear span ratios. Test results showed that shear and moment capacities of SFRC beams varied from 1.50 to 1.92 and 1.12 to 1.39 times, that of conventional reinforced concrete beam, respectively. Pbde of failure changed from shear mode to moment mode when SFRC was used. Steel fibers having aspect ratio of 75 or thin fibers were found to be most effective for increasing the shear capacity of SFRC beams. A design method has been suggested for analysing and designing SFRC beams. Theoretical results based on this method compare favorably with the test results.
10.14359/6443
SP81-02
R. John Craig, S. Dunya, J. Riaz, and H. Shirazi
The objective of this study was to examine the torsional behavior of reinforced fibrous concrete beams under pure torsion, and to develop a theoretical approach to analyze these beams. The addition of steel fibers to the concrete mix has been receiving more attention as a way of improving the properties of the concrete. This study has two objectives: 1) to observe the behavior of fibrous reinforced concrete in torsion, and 2) to present a realistic method for analysis of fibrous reinforced concrete in torsion. Nine beams were analyzed and experimentally tested. There were two beams with no fibers, seven of them with different percentages of fibers by volume (two different types). All beams had the same longitudinal bars but the hoop spacing was varied.
10.14359/6444
SP81-03
Gordon Batson, Terry Terry, and Ming-Sung Chang
Test data using steel fibers as torsional shear reinforcement for 36 reinforced concrete beams subjected to combined bending and torsion are presented. Beams were loaded in bending at third points and by third point torsional loading. Straight steel fibers were 1.0 in (25.4 mm) long by 0.010 x 0.022 in (2.5 x 5.0 mm) in cross section and the volume percentages of fibers were 0.0, 0.5 and 1.0 and 1.5 percent. Test data were compared to a theory developed by Martin for concrete beams subjected to bending and torsion reinforced with longitudinal steel only, no closed stirrups. One volume percent or greater of straight steel fibers in combination with longitudinal torsional reinforcement were effective as torsional reinforcement for M/T ratios less than two. For M/T ratios greater than 10, 0.5 volume per cent was sufficient for torsional rein-forcement.
10.14359/6445
SP81-04
R. John Craig, J. McConnell, H. Germann, N. Dib, and F. Kashani
The behavior of reinforced fibrous concrete columns was observed with a testing program of 36 columns. The theory was analyzed with the help of interaction diagram load-moment, which was developed for this investigation. Previous investigation results, equations, were modified to reflect the presence of fibers in the reinforced concrete columns. Fifteen columns with modeled dimensions of 6 by 4.75 inches were tested in pure axial compression with steel fiber contents of 0%, .75%, and 1.5% by volume with tie spacings ranging from 3 to 9 inches. Twenty-one columns were analyzed and experimentally tested to examine the shear behavior of axially loaded fibrous reinforced concrete short columns under double curvature bending.
10.14359/6446
Results Per Page 5 10 15 20 25 50 100
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.
Edit Module Settings to define Page Content Reviewer