The Use Of Steel Fiber Reinforced Concrete In Containment And Explosive Resistant Structures
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Author | : Charles H. Henager |
Publisher | : |
Total Pages | : 5 |
Release | : 1983 |
Genre | : |
ISBN | : |
The results of several investigations of steel fiber reinforced concrete (SFRC) under explosive loading are presented. Tests using high explosives were performed by the U.S. Corps of Engineers to compare reinforced concrete slabs using conventional concrete to similar slabs using SFRC. The conventional slabs containing SFRC retained their integrity even though severely damaged. Similar results were obtained with explosive tests on slabs by Lawrence Livermore Laboratory, impact loading by a pendulum-type impact machine, ballistic impact by small arms fire, impulsive loading on beams and a drop weight impact test. Use of SFRC in a reactor containment structure is reviewed. Design aids and potential applications of SFRC for blast resistance in structures are listed. (Author).
Author | : Deidra Kalman |
Publisher | : |
Total Pages | : |
Release | : 2010 |
Genre | : |
ISBN | : |
Reinforced concrete is a common building material used for blast resistant design. Adding fibers to reinforced concrete enhances the durability and ductility of concrete. This report examines how adding steel fibers to reinforced concrete for blast resistant design is advantageous. An overview of the behavior of blasts and goals of blast resistant design, and advantages of reinforced concrete in blast-resistant design, which include mass and the flexibility in detailing, are included in the blast resistant design section. The common uses for fiber-reinforced concrete, fiber types, and properties of fiber reinforced concrete varying with fiber type and length, and concrete strength are discussed in the fiber-reinforced concrete section. Two studies, Very High-Strength Concrete for Use in Blast-and-Penetration Resistant Structures and Blast Testing of Ultra-High Performance Fiber and FRP-Retrofitted Concrete Slabs, are reviewed. Lastly, the cost, mixing and corrosion limitations of using steel fiber-reinforced concrete are discussed. Reinforced concrete has been shown to be a desirable material choice for blast resistant design. The first step to designing a blast resistant reinforced concrete structure is to implement proper detailing to ensure that structural failures will be contained in a way that preserves as many lives as possible. To design for the preservation of lives, a list of priorities must be met. Preventing the building from collapse is the first of these priorities. Adding steel fibers to concrete has been shown to enhance the concrete's post-crack behavior, which correlates to this priority. The second priority is reducing flying debris from a blast. Studies have shown that the failure mechanisms of steel fiber reinforced concrete aid in reducing flying debris when compared to conventional reinforced concrete exposed to blast loading. The major design considerations in designing steel fiber reinforced concrete for blast resistant design include: the strength level of the concrete with fiber addition, fiber volume, and fiber shape. As research on this topic progresses, the understanding of these factors and how they affect the strength characteristics of the concrete will increase, and acceptance into the structural design industry through model building codes may be possible.
Author | : |
Publisher | : |
Total Pages | : 816 |
Release | : 1984 |
Genre | : Power resources |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 252 |
Release | : 1983 |
Genre | : Blast effect |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 618 |
Release | : 1984 |
Genre | : Shock (Mechanics) |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 612 |
Release | : 1984 |
Genre | : Power resources |
ISBN | : |
Author | : Nemkumar Banthia |
Publisher | : |
Total Pages | : 272 |
Release | : 1999 |
Genre | : Cement composites |
ISBN | : |
Author | : American Concrete Institute |
Publisher | : |
Total Pages | : 1294 |
Release | : 2007 |
Genre | : Concrete |
ISBN | : |
Author | : Nikhil Vasant Moon |
Publisher | : |
Total Pages | : 123 |
Release | : 2020 |
Genre | : |
ISBN | : |
This research investigates the effect of an accidental explosion of a steam boiler in a boiler room on steel fiber reinforced concrete (SFRC) structure in an industrial facility, using nonlinear analysis in ABAQUS FEA software. The mechanical properties of SFRC are calculated through testing at the UTA Civil Engineering Laboratory Building. Steel fiber dosages in concrete at different volume fractions are examined for the mechanical properties of concrete. In total, 9 (4" x 8") cylindrical specimens for compressive strength and modulus of elasticity test, 9 (4" x 8") cylindrical specimens for tensile strength test, and 9 (6" x 6" x 21") beam specimens for modulus of rupture test were produced and tested after 28 days of curing. Modulus of Elasticity is found for the different volume fractions of SRFC by stress vs strain curve from experimental tests. Adding 1% of steel fiber in concrete can increase the modulus of elasticity by 11%, compressive strength by 22%, tensile strength by 42%, and modulus of rupture by 32 %. Using the concrete properties obtained from experimental results, numerical analysis is done to find the effect of the Steam Boiler explosion on SFRC boiler room using nonlinear analysis in ABAQUS FEA software. Dynamic/Explicit loading condition is considered for analysis. It's found that adding 1% steel fiber by volume fraction can increase the overall capacity of concrete structure by 26%, decrease strain by 21%, and decrease the deflection by 23%. Parametric studies are also carried out at 1% SFRC by different arrangements of Steam Boiler closed room - with a rigid roof, with a frangible roof and circular vent in the roof. It's found that the reflected pressure due to explosion can be significantly reduced on the surrounding walls. In case, roof with circular vent the stresses decrease by 50%, strain decrease by 70% and with frangible roof stress decrease by 31%, strain by 38% and strain decrease by 38%.
Author | : |
Publisher | : |
Total Pages | : 652 |
Release | : 1989 |
Genre | : Building |
ISBN | : |