The Use of Steel Fiber Reinforced Concrete in Containment and Explosive-Resistant Structures

The Use of Steel Fiber Reinforced Concrete in Containment and Explosive-Resistant Structures
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).

Experimental and Numerical Study of Steel Fiber Reinforced Concrete Structures Subjected to Internal Explosion

Experimental and Numerical Study of Steel Fiber Reinforced Concrete Structures Subjected to Internal Explosion
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%.