Dynamic Strength Study of Small, Fixed-edge, Longitudinally Restrained Two-way Reinforced Concrete Slabs
Dynamic Strength Study of Small, Fixed-edge, Longitudinally Restrained Two-way Reinforced Concrete Slabs

Author: Wayne M. Brown

Publisher:

Published: 1973

Total Pages: 118

ISBN-13:

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Increases in ultimate strengths of 23.7 (Series I) and 24.6 (Series II) percent under dynamic loading were obtained. Theoretical slab strengths were determined. Modification of the equations used allowed good predictions of tensile membrane resistance of the static slabs. The equations were used to predict peak pressures sustained by the dynamic slabs.

Strength and Behavior of Reinforced Concrete Slab-column Connections Subjected to Static and Dynamic Loadings
Strength and Behavior of Reinforced Concrete Slab-column Connections Subjected to Static and Dynamic Loadings

Author: Marvin E. Criswell

Publisher:

Published: 1970

Total Pages: 434

ISBN-13:

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The objectives of this investigation were to study the strength and behavior of slowly (statically) loaded reinforced concrete slab-column connections and to determine the effect of rapid (dynamic) loading on the strength and behavior by comparison with the static test results. Nineteen full-scale models of a connection and adjoining slab area, consisting of a simply supported slab 84 or 94 inches square and 6-1/2 inches thick loaded concentrically on a 10- or 20-inch-square stub column at the center of the slab, were tested. The main variables were the amounts of reinforcement in the slab (p = 0.75 and 1.50 percent), the column size, and the loading speed. Eight specimens were loaded to failure statically, two were subjected to a very rapidly applied load of short duration, and nine were loaded to failure by a rapidly applied load with a rise time chosen to represent the conditions in a blast-loaded structure. The static test results are compared with 12 shear strength prediction methods. Differences between the mechanism of shear failure in slabs and beams are examined. (Author).

Expedient Upgrading of Existing Structures for Fallout Protection
Expedient Upgrading of Existing Structures for Fallout Protection

Author: William L. Huff

Publisher:

Published: 1978

Total Pages: 106

ISBN-13:

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This study was conducted in support of the Defense Civil Preparedness Agency's (DCPA) Crisis Relocation Planning (CRP) program in which existing structures will be upgraded to provide fallout shelters for a relocated population. A demonstration test was conducted in which a residential dwelling was upgraded by placing soil against the walls and on the roof of the structure. The shelter was large enough to house 80 people. Upgrading was accomplished partially by hand labor and machinery. The test showed that a conventional structure could be upgraded and that the shelter occupants using tools and materials found in most homes could if necessary upgrade their shelter during the expected 2- or 3-day period of crisis relocation preceding a nuclear attack.