Accession Number : AD0781342

Title :   Feasibility Study for Building a Rapidly Constructed, Low-Cost, Inflatable-Formed, Steel Fiber-Reinforced Concrete Structure.

Descriptive Note : Final rept. Jul 72-Jul 74,


Personal Author(s) : Cox,F. B.

Report Date : JUN 1974

Pagination or Media Count : 45

Abstract : The objective of this investigation was to determine the feasibility of constructing dome-shaped structures by using an inflatable membrane as a form for supporting fresh concrete made with a retarded concrete mixture and random steel fiber reinforcement. A 6-ft-diameter, dome-shaped, steel fiber-reinforced shell was fabricated to a 1-in. minimum thickness with a laboratory-constructed inflatable membrane. The shell was then allowed to cure for a prescribed period, placed on a reinforced concrete footing, instrumented with four electrical and eight mechanical strain rosettes, loaded to a 50-psf (horizontal projection) level with moisture-proof sandbags, and then observed for a brief period of time. Principal strains and stresses were calculated from test information obtained from each strain rosette after which the principal stresses were compared to the tensile and compressive characteristics of the steel fiber-reinforced concrete mixture. (Modified author abstract)

Descriptors :   *Domes(Structural forms), *Reinforced concrete, *Inflatable structures, Shells(Structural forms), Fiber reinforcement, Loads(Forces), Strain(Mechanics), Stress testing, Tensile stress

Subject Categories : Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE