Download Free The Strength And Behavior Of Steel Fiber Reinforced Concrete Under Combined Tension Compressed Loading Book in PDF and EPUB Free Download. You can read online The Strength And Behavior Of Steel Fiber Reinforced Concrete Under Combined Tension Compressed Loading and write the review.

The addition of steel fibers to concrete-type materials has been shown to improve many of the engineering properties of those materials. Notable among them is an enhancement in the tensile strength of an otherwise weak and brittle material. Although much is known about the tensile strength of steel-fiber reinforced concrete (SFRC) under one-dimensional state of stress, little is known with regard to the strength behavior under multi-dimensional tension-compression loading. This is attributed to a lack of suitable equipment for simultaneously applying tensile and compressive stresses. The research program described herein is focused on developing such equipment to study the behavior of SFRC under combined loadings. A review of the state-of-the-art research on the tensile strength of SFRC is given and a review of various methods of applying tensile stresses to concrete specimens is presented. The problem is to be overcome in applying a pure principal tensile stress are discussed.
This report summarizes two phases of the research project. The first phase dealt with the strength and behavior of steel fiber reinforced concrete subjected to biaxial compression-tension loadings. A new piece of direct tension loading apparatus was designed and assembled for this study. Load history effects on the degradation of the tensile strength were also investigated. The second dealt with the modeling of a buried culvert system, both numerically and in the geotechnical centrifuge. The centrifuge test results were compared to the numerical analytical results to provide a validation of the numerical algorithm in which constitutive models could be incorporated.
Despite tremendous advances made in fracture mechanics of concrete in recent years, very little information has been available on the nature of fracture processes and on reliable test methods for determining parameters for the different models. Moreover, most texts on this topic discuss numerical modeling but fail to consider experimentation. This book fills these gaps and synthesizes progress in the field in a simple, straightforward manner geared to practical applications.
This book discusses design aspects of steel fiber-reinforced concrete (SFRC) members, including the behavior of the SFRC and its modeling. It also examines the effect of various parameters governing the response of SFRC members in detail. Unlike other publications available in the form of guidelines, which mainly describe design methods based on experimental results, it describes the basic concepts and principles of designing structural members using SFRC as a structural material, predominantly subjected to flexure and shear. Although applications to special structures, such as bridges, retaining walls, tanks and silos are not specifically covered, the fundamental design concepts remain the same and can easily be extended to these elements. It introduces the principles and related theories for predicting the role of steel fibers in reinforcing concrete members concisely and logically, and presents various material models to predict the response of SFRC members in detail. These are then gradually extended to develop an analytical flexural model for the analysis and design of SFRC members. The lack of such a discussion is a major hindrance to the adoption of SFRC as a structural material in routine design practice. This book helps users appraise the role of fiber as reinforcement in concrete members used alone and/or along with conventional rebars. Applications to singly and doubly reinforced beams and slabs are illustrated with examples, using both SFRC and conventional reinforced concrete as a structural material. The influence of the addition of steel fibers on various mechanical properties of the SFRC members is discussed in detail, which is invaluable in helping designers and engineers create optimum designs. Lastly, it describes the generally accepted methods for specifying the steel fibers at the site along with the SFRC mixing methods, storage and transport and explains in detail methods to validate the adopted design. This book is useful to practicing engineers, researchers, and students.
The constitutive properties of steel fiber reinforced concrete (FRC) are being studied experimentally in a unique fluid cushion multiaxial cubical test cell at the University of Colorado. In the first phase of the program, the behavior of FRC was tested under three-dimensional compressive loading. The strength and stress-strain properties are analyzed by using constitutive models available in the literature. In the second phase, a modification to the existing test apparatus was made for testing cubical specimens under direct tension loading. The modification consists of brushes with individual bristles glued to the specimen. In this paper, results are shown from the biaxial tension-compression test program to demonstrate the strength interaction. (Author).