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Title: Effects of shear stirrup details on ultimate capacity and tensile membrane behavior of reinforced concrete slabs
Authors: Keyworker Blast Shelter Program.
United States. Federal Emergency Management Agency.
Woodson, Stanley C.
Garner, Sharon B.
Keywords: Blast shelter
Keyworker blast shelter
Nuclear bomb shelter
Reinforced concrete
Ultimate capacity
One-way slab
Tensile membrane
Blast effects
Explosion effects
Publisher: Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical report (U.S. Army Engineer Waterways Experiment Station) ; SL-85-4.
Description: Technical Report
Abstract: At the time this study was initiated, civil defense planning in the United States called for the evacuation of nonessential personnel to safe host areas when a nuclear attack is probable, requiring the construction of blast shelters to protect the keyworkers remaining in the risk areas. The placement of shear stirrups in the one-way reinforced concrete roof slabs of the shelters will contribute significantly to project costs. Ten one-way reinforced concrete slabs were statically and uniformly loaded with water pressure, primarily to investigate the effect of stirrups and stirrup details on the load-response behavior of the slabs. The slabs had clear spans of 24.0 inches, span to effective depth ratios of 12.4, tensile reinforcement of 0.75 percent, and concrete strengths of approximately 5,000 psi. The test series significantly increased the data base for uniformly loaded one-way slabs. Support rotations between 13.1 and 20.6 degrees were observed. A more ductile behavior was observed in slabs with construction details, implying better concrete confinement due to more confining steel (i.e., closely spaced stirrups, double-leg stirrups, and closely spaced principal reinforcing bars). The parameters investigated did not appear to have a significant effect on ultimate load capacity. In the case of the Keyworker Shelter, the test series resulted in the recommendation of construction details which reduce construction costs to a level less than the preliminary shelter design. NOTE: This file is large. Allow your browser several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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