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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.
Research on utilizing steel fiber vs concrete reinforcement in bridge deck to replace more traditional reinforcing bars is sparse, therefore a research into this topic is interesting to identity opportunities for speeding up of construction by avoiding laying and tying reinforcement and verifying clear cover to reinforcing bars which is one of the most time-consuming processes involved in construction. This study investigates the efforts of steel fiber on the bridge deck from the strength and economical implementation. Four concrete mix design with vary steel fiber dosages of 0.0%, 0.5%, 1.0%, and 1.5% used in this study. The physical properties of steel fiber reinforced concrete were calculated through various tests at the Civil Engineering Laboratory Building. In total, 12-cylinder specimens of 4-inch diameter and 8-inch height, 12-cylinder specimens of 6-inch diameter and 12-inch height, 12- beam specimens of 6x6x20 inch and 12-slabs 45x20x3.5 inch were produced and tested after 28 days of curing. The specimens were tested for their compression, modules of rapture, flexural behavior as well as the split tensile test.The experiments revealed that the increase in the dosage of steel fiber fraction increases the compressive strength of the concrete by 17.4%, 23.5%, and 19.6% respectively for normal weight concrete without steel fiber. The breakout strength of concrete in tension increased by 21.6%, 33.6% and 54.8% for 0.5%, 1% and 1.5% volume fraction of steel fiber in concrete respectively. It is also found that adding steel fiber improves the ductility of slabs specimens behavior, the area under the load-deflection curves increases compare with normal concrete. Also adding steel fiber to the concrete matrix decreases the crack width and preventing the sudden collapse as in normal concrete. The cost analysis showed that utilizing steel fiber as concrete reinforcement in bridge decks improved the opportunity for economical construction, speeding up construction, more corrosion resistant options over the conventional reinforcing bars as corrosion of reinforcing steel in the most common path to failure of the bridge deck.