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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 46 Abstracts search results
Document:
SP149-11
Date:
October 1, 1994
Author(s):
D. Galeota, M. M. Giammetteo, and R. Marino
Publication:
Symposium Papers
Volume:
149
Abstract:
Results of an experimental study on the structural behavior of exterior beam-column joints made of high-strength concrete and subjected to large reversal loads are presented. Variables examined were the joint shear stress and the ratio of transverse reinforcement. Based on the experimental results, it was shown that properly designed and detailed high-strength reinforced beam-column joints display ductile hysteretic behavior.
DOI:
10.14359/4159
SP149-12
H. Manalip, M. Pinglot, and M. Lorrain
Although high-strength concrete (HSC) has a brittle behavior in the case of specimens subjected to axial compression, a quite different behavior is obtained in the case of reinforced or prestressed concrete members subjected to bending. In this paper, five tests of HSC beams subjected to pure bending are described and analyzed to quantify their ductility and to deduce the real strain-softening behavior of their compressed zones. Three cases are studied: reinforced concrete, prestressed concrete, and partially prestressed concrete. The comparison of the experimental ultimate deformations (such as plastic rotations, curvatures, deflections) with the calculated values show that the strain-softening of compressed concrete may occur after the peak stress and can be defined by a k' coefficient varying from 0 to 1. For the tested beams, it was found that the use of HSC instead of normal strength concrete (NSC) results in the doubling of the plastic rotation capacity, for reinforced or prestressed beams subjected to pure bending.
10.14359/4162
SP149-13
M. Imama Vamdewalle, and F. Mortelmans
Sixteen very high strength concrete beams (3600 x 350 x 200 mm) with and without steel fibers were tested under different combinations of shear force and bending moment. The beams were singly reinforced and without shear (web) reinforcement. The cylinder compressive strength of concrete was about 110 MPa. The main variables in this program were: shear span/depth ratio (a/d), the steel fiber content (V f), and the percentage of the longitudinal flexural reinforcement ({rho}). The test results showed that, adding steel fibers to high-strength concrete increased the ultimate shear strength, increased the stiffness, reduced the deflection, and transformed the failure mode into a more ductile one. Based on the test results, two empirical expressions have been proposed to predict the shear strength of steel fiber high-strength concrete.
10.14359/4164
SP149-21
N. A. Lloyd and B. V. Rangan
Presents the results obtained from tests on high-performance concrete columns. Twenty-four columns were tested. The test parameters included shape and size of cross section, longitudinal reinforcement ratio, load eccentricity, and concrete compressive strength. Analytical methods to predict the behavior and strength of columns are also presented. Good correlation between test and analytical results is found.
10.14359/4167
SP149-30
I.K. Fang and J.Y. Wu
An experimental investigation was conducted on the shear behavior of deep beams made with steel fiber reinforced high performance concrete (HPC). Twenty-six beam specimens with various shear span-effective depth ratios, steel fiber contents, amounts of vertical and horizontal web reinforcements were tested under static loads. In addition to the strength test, extensive instrumentations were designed for the measurements of average strains of reinforced concrete in the shear span and strains of web reinforcements. The web-shear cracking initiated as the first inclined shear crack. About 30% increase in the inclined shear strength and 25% increase in the ultimate shear strength can be achieved with addition of 1 .O% steel fiber for specimens having a/d= 1 .5. The strain of vertical web reinforcements became negative and the horizontal web reinforcements were stretched to yield state for specimens having a/d ratios approach 0.5. The measured load-deformation relationships of reinforced concrete and strains of web reinforcements were compared with the prediction of the softened truss model of steel fiber reinforced concrete proposed by other investigators. Good correlation was found from the comparisons.
10.14359/10050
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